Home

BackToCAD Print2CAD 2013 2U OCR

1. Zoom to window size Zoom window Delete a highlighted area Snap point of the line Marking a line with line type e BEG PintzcaD Kaz0 Sf E Edit Viey Windows Hel x A 59 1 a 436 p 365 150 0 150 20 26 w TTT I I Br T s Ai Hittin oo ass To x d l we z Nr Lay ent hee g AN een N TI a al 2 PON ERS eee oe eae a a Id g ul IN NEE a 447 350 350 Ir 350 2 16 06 a Kantate Mew Marking the line type area Print2CAD OCR 2013 139 Q lt N w c DL OCR 2013 24 Calibration of Coordinates Print2CAD s OCR techniques also allow the accurate calibration of the coordinates of the converted drawing 24 1 Basics of the Calibration Problem The coordinates of PDF HPGL DWF TIFF and JPEG files often have a significant accuracy error This error is mostly created by exporting entities in a raster of 72 dpi dots per inch Print2CAD features settings to allow the user to calibrate the coordinates of the con verted drawing This calibration happe
2. V Save Converted File to the Following Directory C Seminar PDF Target Directory Important The activation method depends upon how and where you purchased the program Please follow the activation instructions you receive from our purchasing system If you purchased the USB hardlock version of the program then you do not have to activate it Once you click the Activation button in the presence of the USB hard lock the notice OK USB Code Meter found will appear Print2CAD OCR 2013 46 5 8 Load and Save Program Settings When ending the application the program saves the current program settings automati cally The same options will then be loaded when starting the program again This option can be turned off in the Configuration Tab ofthe Main Menu Q lt S N oO OCR 2013 You can save and load all program settings by clicking the button Save Settings a file with extension p4c will be created and Load Settings Print2CAD TM OCR 2013 Start Configuration SS aA n Name Size Path Analysis Vectorization Optimization gt Convert PDF to DWG DXF Convert HPGL to DWG DXF Convert DWF to DWG DXF Convert TIFF JPEG to DWG DXF 5 Convert PDF to TIFF JPEG Convert DWG DXF to PDF DWG DXF to PDF Settings El Save Converted File to Source Directory
3. Andreas Ch Kazmierczak Print2CAD __ 2013 0CR Manual mau A 4 M Sc Eng Andreas Ch Kazmierczak is the founder and developer of Print2CAD Software He has been develo ping software since 1982 He gained his knowledge of software development over the course of his university career followed by post grad training Andreas attended the Technical University in Aachen Germany where he earned his Master Degree in Engi neering During his studies at the University of Aa chen he gained foundational knowledge of numerical mathematics 3D geometry and efficient programming techniques He worked on doctor as an scientific assis tant in the Department ofHydrology and Statistics where he created successful programs in the computer languages FORTRAN C and Basic He gave lectures and training sessions on artifical intelligence and statistics methods in hydrology His academic career has enabled him to successfully invent conversion programs and fostered his creativity in this area After many years of learning and training Andreas Kazmierczak s software is now known and used worldwide Andreas Kazmierczak holds many patents in data security and exchange methods In March 1993 Andreas Kazmierczak founded the company Kazmierczak Inc specia lizing in commercial software for building and the exchange of data between different CAD Computer Aided Design systems In 1997 Andreas Kazmierczak founded the Li
4. Please choose the fles you wich to convert and the drectory in which to save them Note You can select multiple fs eT Lee if necessary to verify your selections FZ Save Converted File to Source Director E save Converted File to the Following D I a os Scale of Sdected Fle Conversion Finished ted fies are saved in C Seiner PDF directory settings 104c are saved and you can use these setings for future Nain Menu Print2CAD OCR 2013 29 4 1 Selection of the conversion method and the target formats In the first step of our Wizard the questions should be answered regarding the conversion method and the DWG DXF target format Our Wizard supports conversions from PDF into DWG DXF from HPGL2 into DWG DXF from DWF to DWG DXF and from TIFF JPEG PNG GIF into DWG DXF In the case of other formats you are directed to the main screen program ase choose the conversion type and target format Conversion Type Target Format RealDWG or DXF Convert PDF to BYVG DXF DWG 2004 2006 Convert HPGL HPGL 2 HP RTL to DWG DXF Convert DWF to DWG DXF 5 L Convert TIFF JPEG PNG GIFF to DWG DXF Convert PDF to TIFF JPEG PNG GIFF Convert DWG DXF to PDF Convert with Following Settings Load Settings Continue gt Legend 1 Video clip introduction via
5. by Autodesk Inc Kazmierczak R Technology Group Kazmierczak R Software GmbH BackToCAD Technologies LLC Stuttgart Germany Atlanta Georgia USA ag www dxf net www print2cad info Language Selection available in multiple languages Unit selection for resulting DWG or DXF Last settings will be saved upon exiting the program Path for temporary files Using the Prefix Print2CAD for converted files Ci Bobo Print2CAD OCR 2013 97 Q lt g i o OCR 2013 13 1 Choosing The Program Language The Software Print2CAD is available in English Spanish Italian French and German 13 2 Unit Of The Converted DWG Or DXF File This option allows the user to select the unit for measurement in their converted DWG or DXF file The standard unit of PDF files is mm 13 3 Keeping Settings After Ending The Program When exiting the program the last settings are saved and automatically loaded when the program is restarted 13 4 Using Prefix Print2CAD For Converted Files The user can choose to use the prefix Print2CAD with their converted files Important Please be careful When turning off the prefix of converted files the target files will be overwritten without warning 13 5 Path For Temporary Files Print2CAD uses the Windows temporary directory for its own temporary files However Print2CAD offers a possibility to change this directory Just enter your
6. BAUVORHABEN Print2CAD OCR 2013 130 NDA WN 18 7 e Recognized Text i 18 79 Fis 79 2 sus2 91 52 m 3 17 28 17 28 4 p14 91 49 5 0 5 10 65 as List of recognized words and numbers Words recognized with OCR Bitmap OCR base with the text of the PDF DWF or HPGL file Correction of a word Save the word correction Deleting a word Load last correction list if you convert the same file again Print2CAD OCR 2013 131 x N c A OCR 2013 22 2 5 Text Recognition Quality The quality of the text recognition is amongst other things influenced by the following factors Quality of the specified text areas depending on the user Extent and quality ofthe prototype database given in the software Extent and quality of the dictionaries given in the software Quality of the manual correction of the words depending on the user Chromaticity contrast layout and font of the original file Resolution and quality of the image file depending on RAM Whereas a pure pattern recognition with Print2CAD achieves a correctness in the range of 90 every tenth figure gets recognized incorrectly a good manual review achieves a correctness of up to 99 Important While text allows a higher error ratio numbers e g dimension numbers require a thorough and repeated proofreading Espe
7. DWG This is checked and performed internally and behind the scenes However this results in the file going through a 300 DPI plot interface which if any element or coordinate is not directly on any one of those 300 dots then the coordinate will be moved to the closest dot thereby losing accuracy in the final drawing This is a permission situation and it may be necessary to calibrate the coordinates see Section 24 16 2 Permission to Extract Content If the permission to Extract Content is enabled in the PDF then a direct coordinate ex traction can occur resulting in the best accuracy of coordinate placement in the final DWG 16 3 Encrypted PDF Converting of encrypted PDFs is not supported Print2CAD OCR 2013 101 Q lt N i oO OCR 2013 17 PDF to Raster Conversion r Print2CAD TM OCR 2013 Start Configuration Name Size Path Convert PDF to DWG DXF Convert HPGL to DWG DXF Convert DWF to DWG DXF Convert TIFF JPEG to DWG DXF Convert PDF to TIFF JPEG Convert DWG DXF to PDF DWG DXF to PDF Settings Save Converted File to Source Directory V Save Converted File to the Following Directory C Seminar PDF Target Directory View PDF Analysis Vectorization Optimization File Type Pages for Conversion Resolution dpi Anti Alias
8. OCR 2013 This option is ideal for colorful pictures PDF Figure Example of a pixel image conversion into the DWG entity Solid Print2CAD OCR 2013 89 11 Thresholds for Black and White Raster Extracting In this menu you will find options that apply to all vectorization methods save Raster Picturesfo Target Directory Cl Save Raster Pictures fh Selected Directory Path 0 255 Threshold for Color Black Q MORIRE i Threshold for Color Black Threshold for Color White Red 150 0 255 opt 150 Red 210 0 255 opt 210 Green 150 0 255 opt 150 Green 210 0 255 opt 210 Blue 150 0 255 opt 150 Blue 210 0 255 opt 210 re C er 1 Extracting PDF Raster Images to the Hard Disk and embedding them as Element Image 2 Threshold for colors Black and White Print2CAD OCR 2013 90 11 1 Extracting Pixel Images to the Hard Disk This function allows pixel images to be extracted to the hard disk Print2CAD takes these raster images and embeddes them or refers to them as element Image in aDWG or DXF file Q lt oO S o OCR 2013 Print2CAD OCR 2013 91 11 2 Threshold for Colors Black and White It may be necessary of the user to define what value of brightness is white and what value of darkness is black so that only bright pixels of raster images get allocated to the color white
9. Figure Vectorization of the outlines of pixel areas and traces Z Bild3 pdf Adobe Rea Window Help 59 06 x 59 06 in 4 File Edit View Document Tools Bild3 pdf Adobe Rea lE File Edit View Document Tools Window Help gt 59 06 x 59 06 in 4 Figure PDF file suitable for a vectorization along the outlines Print2CAD OCR 2013 78 9 3 Improvement of the Vectorization Process 9 3 1 Recognition of Horizontal and Vertical Lines Q lt N i DL OCR 2013 The horizontal and vertical lines are recognized Figure Raster image with horizontal and vertical pixel traces 9 3 2 Recognition of Inclined Lines Recognition of n 45 degree inclined pixel traces as n 45 degree inclined lines horizontal Wty LL Figure Recognition of 45 degree inclined lines Print2CAD OCR 2013 79 9 3 3 Circle and Arc Recognition Detection of circles and arcs occurs when a closed polyline fits the parameters required of an arc or circle 9 4 Improving Pixel Images Before the Vectorization PDFs with an embedded raster picture have to be improved before executing the vecto rization process This step is often necessary to ensure the quality of the converted file Figure Perforated pixel traces created by incorrect scanning Print2CAD OCR 2013 80 9 4 1 Filling Small Holes in the Pixel Traces This setting fill
10. I ICR 129 Illustrator 11 Improving 80 Inclination 136 IntelliCAD 12 ITU T 109 J JFIF 104 JPEG 10 14 28 30 101 103 104 106 109 116 133 140 JPG 44 Q lt N w i oO OCR 2013 Print2CAD OCR 2013 147 K Kazmierczak 30 32 34 37 39 40 L Layer 53 118 layers 34 Layer Structure 53 Layouts 118 LCD 111 Line Type Areas 134 Line Type Recognition 133 134 Line Types 136 line weight 125 Line Width 120 List of Coordinates 142 LZW 108 M Microsoft 104 Model Space 118 N Normalization 121 O OCR 35 38 42 65 73 112 122 124 131 OCR Mode 122 Open Design Alliance 12 Optimization 42 OS 2 104 Outline 77 Outlines 78 Output 69 Print2CAD OCR 2013 148 P a OR p4c 33 39 40 41 47 Sg Palette 84 Paper Format 120 Pattern 128 Pattern Length 134 Pattern Matching 129 PDF 10 11 14 22 24 25 26 27 28 30 31 32 35 38 42 43 44 48 49 50 51 54 55 56 58 60 62 63 64 65 69 70 71 75 77 78 80 86 87 90 98 99 101 102 113 114 116 120 131 133 140 PDF Reader 65 Photoshop 11 pixel 85 Pixel 75 77 96 128 Pixel Areas 78 PNG 14 30 44 105 Polylines 95 Polyline Vertexes 53 PostScript 11 14 106 Print2CAD 10 27 28 31 33 43 44 49 54 55 56 59 61 65 68 69 70 91 97 98 99 100 116 130 133 140 Print2CAD OCR 2013 100 Purge 53 62 PVGview 35 36 38 R RAM 28 63 raste
11. Optimization of DWG or DXF File Optical Character Recognition OCR Starting the Conversion Starting the DWG DXF Viewer Saving the Selected Program Settings Wizard for Optimum Settings Activation of the Software San Men DI S Print2CAD OCR 2013 42 in Print2CAD TM OCR 2013 Start Configuration SSO ahi Size Path Q lt S N oO OCR 2013 Analysis Name Vectorization Sooo Convert PDF to DWG DXF N Convert HPGL to DWG DXF Convert DWF to DWG DXF Convert TIFF JPEG to DWG DXF Convert PDF to TIFF JPEG Convert DWG DXF to PDF DWG DXF to PDF Settings Optimization Save Converted File to Source Directory V Save Converted File to the Following Directory C Seminar PDF Target Dir View DWG a a a a 5 1 File Selection The program Print2CAD can convert multiple files in one run All selected files will remain in their original condition after the conversion You can choose a target directory for the converted files If no target directory is selected the output files will be saved in the same directory as the source files Multi page PDF files will convert into separate files for each page of the original file Print2CAD OCR 2013 43 5 2 Output Files The following output files can be created when converting CAD files DXF or DWG Raster files BMP JPG PNG TIFF
12. Print2CAD OCR 2013 69 8 3 Sort Text Onto Separate Layer When activating this function all native text gets sorted onto a predetermined layer Ifthere are no real text but only polylines hatches or raster images the letters will not be recognized as text 8 4 Scale Factors for Blank Space Width Text in PDF files is often placed as single letters In this case the spaces are not available When Print2CAD is transforming letters to text blank spaces get recognized with the C n 22 help of a substitute space width equating the letter a Should the space detection does not work properly increase or reduce the substitute space factor according to the below graphic by trial and error Eventuality Factor to set Section 24 1 0 Section24 gt 1 0 Sect i on 24 lt 1 0 Figure Scale Factor for Blank Space 8 5 Scale Factors for Text Width and Height If Print2CAD can t find the fonts used in the PDF in the Windows system Print CAD will select a similar font In doing so the text width may change A workaround for this is the use of scale factors for the text width and height The text will be scaled by the given factor and placed left aligned in the CAD drawing Print2CAD OCR 2013 70 8 6 Replace All Fonts With a SHX ot TTF Font Enabling this option all text styles get the same selected SHX or TTF font assigned DWG DXF Embedded Windows fonts default fonts Figure Fonts in PDF and in DWG or DXF
13. mm Height 210 00 fram 0 00 mm Right 0 00 fmm 0 00 mm Bottom 9 99 mm i PDF embed fonts Geometry optimization enabled SHX or TTF fonts print as geometry Zoom to the drawing limits PDF label Treatment of the layout and the model range Select Paper Size Adopt layers in the PDF Text widths scale Line width set to 0 0 Choice of PDF type Selection from its own directory with DWG DXF fonts Path en Print2CAD OCR 2013 117 Q lt oO gt o OCR 2013 19 4 TTF Fonts as Geometry The text with TTF fonts Windows fonts are recreated into simple geometry lines polylines 19 5 Zoom To Extensions If this option is inactive the last displayed section of the drawing is given out as a PDF When activating this option the drawing is zoomed to extensions before being converted into PDF 19 6 Generate PDF Layer The layer assignement of the DWG or DXF is adopted in the PDF file This option is available only for PDF version 1 4 and higher 19 7 Output Disabled Layers By activating this option disabled layers will also be displayed in the PDF 19 8 Convert Model Space Only the model space of the DWG or DXF will be output 19 9 Convert Current Layout Only the current layout last displayed of the DWG or DXF will be output 19 10 Convert All Layouts All layouts of the DWG or DXF will be output as a PDF with seperate pages Print2CAD OCR 2013 118 19 11 Conv
14. 1 Name of the analyzed file 2 Statistical values of the analyzed PDF file 3 Display of the separated element types of the PDF file Print2CAD OCR 2013 115 19 DWG DXF to PDF Conversion With the help of Print2CAD DWG or DXF files can be converted into PDF files DWG or DXF files can be converted directly into PDF with high quality PDF elements like text circles curves lines with line types and layers Raster images are only displayed if they are inserted in DWG as a BMP JPEG and TIFF files are not supported 19 1 PDF Header The user can enter a description of the PDF file which will later be displayed in the document properties 19 2 Embedding Fonts When using this option fonts are embedded into the PDF file AutoCAD SHX fonts will be displayed with alternative TTF fonts 19 3 Geometry Optimization To speed up the display of the screen layout this option will activate a simple optimi zation of the geometry Print2CAD OCR 2013 116 vsonaupund eS p mo N PDF Hea Title Author PDF Properti s Layout O T Embedded Fonts Paper Form Weight Margin Left Top Print2CAD Standard Directory C Geometry Qptimizatlo Z SHX Fonts Geontry l Convert Current Layout EI TIF Fonts as Geofetry F Convert All Layout V Zoom To Extensiohs E Convert All Layouts and Model gfac V Generate PDF Layer Landscape Portrait 297 00
15. Factor for Virtual Blank Space Create Text as Hatches Sort All Text Onto Separate Layer Scale Factor for Text Width Scale Factor for Text Height Replace All Fonts With a TTF Font Replace All Fonts With an SHX Font DSO ee Oa Print2CAD OCR 2013 64 8 1 Types of Text in PDF Files The text in PDF files can be placed as strings or individual characters How can you find out if your PDF file contains real text The best method is to analyse the PDF file with the analysis function of Print2CAD and see if there are any text entities indicated Another method is to open the PDF file in a PDF Reader and zoom the text to maximum view lt N Ee A OCR 2013 If the letters still have smooth edges displaying an arc not a polyline your PDF file most likely features real text If the edges of the letters are not smooth Print2CAD will not convert the text to real text without activating the OCR function The reason for this is a mathematical contradiction between the vectorization procedure and the OCR procedure Optical Character Recognition The two procedures can not be combined without creating severe errors real text smooth edge Figure Real PDF text with smooth edge Print2CAD OCR 2013 65 When vectorizing OCR function not active a polyline gets drawn along the middle of a pixel trace or the outline of a pixel area and iteratively smoothed Then the polyline gets recognized as a circle elli
16. OCR 2013 36 4 4 Details on the contents and quality In the fourth step our Wizard requests details on the contents and quality ofthe drawing Depending on the answers to these questions suitable settings are generated for the conversion Please pre view your file and select the app te help the Wizard better identify the different elements in the fie AS Lines Circles and Arcs properties Text and other Entities gt GE View Lines Quality no Text Hatch properties Text and other Entities only Text View Hatch Quality no Text Raster pixel image Text and other Entities gt oedomina properties 3 only Text predominantly hatch areas predominantly curves View Raster Quality no Text seak Commme gt Legend 1 Video clip introduction via Kazmierczak Online University 2 Notes on the conversion step 3 Settings regarding the quality of the paths lines arcs and circles 4 Settings regarding the quality of the cross hatching 5 Settings regarding the quality of the raster bit mapped images Print2CAD OCR 2013 37 Q lt N i oO OCR 2013 During the analysis ofthe drawing the paths lines arcs and circles the cross hatching and the raster images are saved in various PDF files The native text elements are ignored when doing this Press the View selected file button and view
17. Q lt S N oa OCR 2013 12 2 Enforce Smoothing Motion This setting caused the polylines created during vectorization to be smoothed or rendered less wavy and or jagged This is not a fix all but it improves the conversion 12 3 Max gap jump in pixels The maximum gap in pixel traces that is filled in can be adjusted Optimally 3 to 7 pixels Figure A gap jump in a pixel trace Print2CAD OCR 2013 95 12 4 Tolerance in Pixels This function allows you to control the tolerance in pixels to determine the center of the pixel traces 12 5 Conjugation Tolerance in Pixels This function allows you to control the tolerance in pixels to determine the center of arc like pixel traces 12 6 Minimum Pixel Length All pixels with a length less than or equal to the specified number get purged 12 7 Arc Tolerance in Pixels This function allows you to control the maximum deviation of a pixel arc or circle from the calculated arc or circle 12 8 Angel Sensitivity in Pixels This function allows you to control when a pixel trace merges into another pixel trace like an angle Print2CAD OCR 2013 96 13 Configuration Automatic franslation By Google Translator R Italian Spanish Path Powered by oy 4 RealDWG 7 w ge e 3 Path lt i Z Use Print2CAD Pref for Converted Files Contains N Autodesk R RealDWG
18. RAW GIF PostScript files EPS PDF files PDF 5 3 Target Directory for Converted Files A target directory for the converted files should be specified If a target directory is not selected the output files are created in the same directory as the source files The converted files will have the prefix Print2CAD This option can be turned off in the configuration Note In this case the original files will be overwritten without warning It is therefore best to leave the prefix on until the original data has been copied to another directory or renamed 5 4 Conversion of Directories You may select a directory with source files All files from this source directory are au tomatically converted into the chosen format and saved to a target directory 5 5 Version of the Target File Print2CAD converts into DWG version 14 2000 to 2013 and DXF files version 12 2000 to 2013 compatible DWG is a native AutoCAD format DXF is is a native AutoCAD data exchange format Most CAD systems understand DWG version 2004 The DXF version 12 is understood by many CAD systems however the quality of the DXF data is not sufficient Print2CAD OCR 2013 44 5 6 Wizard With the help ofthe Wizard the optimum settings for certain file types can be selected Q lt oO N m o OCR 2013 To aide with selection of settings the user selects the file type that best matches to his source file which when selected loads the optimum
19. V Save Converted File to the Following Directory C Seminar PDF Target Directory View DWG n DWG por pmo Settings saved as p4c file Figure Save program settings as P4C File Print2CAD OCR 2013 47 6 Optimization Pages and Coordinates 0 0039370 Inch 0 007870 Inch di d di z 0 0118110 Inch Handling of Bright Entities V Do Not Convert Very Bright or White PDF Entities Maximum Brightness of Entities 210 0 255 Opt 210 Le Cx Selection of PDF pages for conversion Scale coordinates with a given factor Transformation of coordinates in direction X and Y Do not convert very bright or white PDF entities Rotate coordinates to a given degree Rotate coordinates to a degree defined by the user Maximum brightness of entities N eS Print2CAD OCR 2013 48 6 1 Select of PDF pages The user can select which pages to convert with PDF files that have multiple pages or simply choose to convert all pages with one execution The selected pages should be separated by using a semicolon e g 1 4 12 34 To convert several pages in a row from to you can use a hyphen e g 12 18 Q lt N i oO OCR 2013 Optimization of Vector a Recognition Purge Layer Colors Pag
20. and computing a grayscale or grayscale digital image is an image in which the value of each pixel is a single sample that is it carries only intensity infor mation Images of this sort also known as black and white are composed exclusively of shades of gray varying from black at the weakest intensity to white at the strongest Grayscale images are distinct from one bit black and white images which in the context of computer imaging are images with only the two colors black and white also called bilevel or binary images Grayscale images have many shades of gray in between Grayscale images are also called monochromatic denoting the absence of any chromatic variation Grayscale images are often the result of measuring the intensity of light at each pixel in a single band of the electromagnetic spectrum e g infrared visible light ultraviolet etc and in such cases they are monochromatic proper when only a given frequency is captured But also they can be synthesized from a full color image see the section about converting to grayscale R G B additive mixture see gray scale table C M Y subtractive mixture Source Wikipedia subject Grayscale Color Space License Agreement http creativecommons org licenses by sa 3 0 Print2CAD OCR 2013 110 17 4 2 RGB Color Space An RGB color space is any additive color space based on the RGB color model A particular RGB color space is defined by the three chromat
21. electronic files to computerize a record keeping system in an office or to publish the text on a website OCR makes it possible to edit the text search for a word or phrase store it more compactly display or print a copy free of scanning artifacts and apply techniques such as machine translation text to speech and text mining to it OCR is a field of research in pattern recognition artificial intelligence and computer vision Quote taken from www wikipedia org definition of term OCR License conditions http creativecommons org licenses by sa 3 0 Print2CAD OCR 2013 124 22 2 Procedure The initial point is an image file raster graphic that will be generated by Print2CAD from the file being converted Q lt N DL OCR 2013 This image file has the name file name_KazOcr tif It is automatically generated in the directory of the drawing being converted When using the OCR method with text separated in lines a clear line weight is needed This OCR line weight can be specified in the OCR text recognition interface It is usually set to 0 4mm If the texts are displayed blurry in the OCR viewer set a lower value 42008 42202 d 0 6 mm d 0 2 mm Another helpful tool of the OCR text recognition is the separation of the texts A lot of PDFs feature texts as hatches If this is the case the separation can help to improve the text recognition by automatically discarding of dis
22. height ranges of text and assigning common text heights to these ranges Existing text heights can be determined with the integrated viewer DeepView and its Analysis function or by clicking the button View and thus opening the Properties The new text height should always have the smallest height of the specified range to make the text look smaller instead of bigger after the conversion Doing so improves the optical impression e g the text does not exceed the frame Convert original Text Hight Normalize Text Hight Manual Normalization of Text Hight Height Interval New Height for Chosen Text New Layer for Chosen Text New Color for Chosen Text SAY Se Se NS Print2CAD OCR 2013 121 Q lt N i oO OCR 2013 21 OCR Mode Text Line Type and Coordinates Recognition Print2CAD can recognize text split into multiple lines polylines hatches and raster pixels using OCR methods Print2CAD s OCR techniques allow the detection of dashed and dotted lines Print2CAD s OCR techniques also allows the accurate calibration of the coordinates of the converted drawing OCR is an abbreviation for Optical Character Recognition OCR also means symbol and pattern recognition Before you use OCR Methods you have to activate the OCR Mode In this mode you can convert only one file and one page at a
23. is saved to seven files per the elementary colors these files then get vectorized one after the other and afterwards assembled into one common DWG or DXF file Red Pixel Pixel Image Yellow Pixel Eu Green Pixel gt Pixel Image Blue Pixel Image Cyan Pixel Image Black Pixel Image Ai 9 6 Interconnecting the Vectorization Elements to a Block All lines circles and arcs are created by the vectorization and combined into a block This block can then be moved or scaled as a unit in a CAD system When using AutoCAD such a block can be disassembled with the command Explode Please keep in mind that AutoCAD converts polylines into splines and ellipses when having diverse block scale factors In this case this function should not be activated Print2CAD OCR 2013 84 9 7 Activating the Smoothing of Lines Ascanned drawing can cause lines to wave after the vectorization Selecting the settings Activating Smoothing Iterations of Lines the wavy lines are smoothed in iterations Q lt N oO OCR 2013 Ee Figure Vectorizing and smoothing of a pixel trace Print2CAD OCR 2013 85 10 Converting into Editable Raster Pictures Use this menu if your PDF contains pasted photos or if you want to edit raster images in DWG or DXF a1 ipfSlack and White with Threshold for Black Handle Raster Images in RGB or Index Colors see Color Palette Selection U
24. linguistical and statistical means According to this evaluation the text will be output or ifrequired will be further processed with modified parameters and another layout and pattern recognition 22 2 3 4 Error Correction on Word Level Handwritten letters that can t be recognized separately will be recognized by comparing global characteristics with dictionaries The accurateness Intelligent Word Recognition IWR decreases with the growing size of the integrated dictionaries Create List of OCR Text Areas E Indude Raster Images V Indude Hatches Modify Append View Delete list E Indude Paths ath Lineweigh 0 No x1 Y1 x2 Y2 x3 Y3 Type 1 592 4548 1965 4548 1965 2394 Text 2 3516 2699 4378 2699 4878 2107 Text Print2CAD OCR 2013 129 22 2 4 Manual Correction of the Recognized Texts Print2CAD offers a special method allowing the user to manually correct the text areas which were recognized incorrectly There is a possibility the computer cannot differ between B and 8 or number 0 and the letter O Therefore as a last step of the text recognition an interaction between the user and the software is required Example The text BAUVORHABEN German Word for Building Project is illegibly displayed ina PDF The OCR method of Print2CAD recognizes the text nuvuwnu Textinhalt nuvuwnu The user corrects it to BAUVORHABEN Textinhalt
25. press operator press manufacturer and press run ink is typically applied in the order of the abbreviation The K in CMYK stands for key since in four color printing cyan magenta and yellow printing plates are carefully keyed or aligned with the key ofthe black key plate Some sources suggest that the K in CMYK comes from the last letter in black and was chosen because B already means blue However this explanation though plausible and useful as a mnemonic is incorrect The CMYK model works by partially or entirely masking colors on a lighter usually white background The ink reduces the light that would otherwise be reflected Such a model is called subtractive because inks subtract brightness from white In additive color models such as RGB white is the additive combination of all primary colored lights while black is the absence of light In the CMYK model it is the opposite white is the natural color of the paper or other background while black results from a full combination of colored inks To save money on ink and to produce deeper black tones unsaturated and dark colors are produced by using black ink instead of the combination of cyan magenta and yellow Source Wikipedia subject CYMK Color Space License Agreement http creativecommons org licenses by sa 3 0 17 5 OCR Definition Optical character recognition usually abbreviated to OCR is the mechanical or elec tronic tran
26. settings r splines native texts 1 i Drawing with native PDF s elements lines 2 Super Quality Drawing with native PDF s elements lines Bezier splines texts as polylines 3 Super Quality Drawing with native PDF s elements hatches with Bezier splines border 4 Super Quality Drawing with native PDF s elements lines as hatches solid native texts 5 Good Quality Drawing with good raster picture black white sharp good filled pixel areas 6 Good Quality Drawing with native PDF s elements lines Bezier splines texts as lines 7 Good Quality Drawing with good raster picture black white shooth well filled pixel areas 8 Middle Quality Drawing with raster picture black white sharp edges thin pixel trains 9 Middle Quality Drawing with raster picture black white no sharp edges thin pixel trains an Middle M mid Diemer en mith runter mich sem blond habitan nharn ndman thim missal benimm i Very well applicable for the conversion very good quality of the coordinates Print2CAD OCR 2013 45 5 7 Activation of the Program depending on Purchasing Method z Print2CAD TM OCR 2013 Start Configuration En AA Analysis Size Path Vectorization Optimization Name Convert PDF to DWG DXF Convert HPGL to DWG DXF Convert DWF to DWG DXF Convert TIFF JPEG to DWG DXF Convert PDF to TIFF JPEG E Save Converted File to Source Directory
27. the Smoothing of Lines 85 10 Converting into Editable Raster Pictures 86 10 1 Common Problems 87 10 2 Converting Raster Images as Horizontal Lines 88 10 3 Converting Raster Images as entity Solid 89 11 Thresholds for Black and White Raster Extracting 90 11 1 Extracting Pixel Images to the Hard Disk 91 11 2 Threshold for Colors Black and White 92 Print2CAD OCR 2013 5 12 13 14 15 16 17 Vectorization Expert Settings 12 1 Smoothing of Polylines 12 2 Enforce Smoothing Motion 12 3 Max gap jump in pixels 12 4 Tolerance in Pixels 12 5 Conjugation Tolerance in Pixels 12 6 Minimum Pixel Length 12 7 Arc Tolerance in Pixels 12 8 Angel Sensitivity in Pixels Configuration 13 1 Choosing The Program Language 13 2 Unit Of The Converted DWG Or DXF File 13 3 Keeping Settings After Ending The Program 13 4 Using Prefix Print2CAD For Converted Files 13 5 Path For Temporary Files Wizard Batch Run with Command Line Syntax of the command line Example for Print2CAD PDF Rights 16 1 Print Permission 16 2 Permission to Extract Content 16 3 Encrypted PDF PDF to Raster Conversion 17 1 Raster Target Format 17 1 1 TIFF 17 1 2 JPEG 17 1 3 BMP 17 1 4 PNG 17 1 5 GIF 17 1 6 RAW 17 1 7 EPS Print2CAD OCR 2013 6 100 100 100 101 101 101 101 102 103 103 104 104 105 105 106 106 17 2 Raster Image Color Depth 107 Q 2 17 3 Raster Image Compression 108 9 a 17 3 1 LZW Compressi
28. the files Then answer the questions on the contents and quality It is important to decide which property predominates Answer the question only horizontal text ifthere really is only horizontal text without other symbols or elements lines circles etc If you answer this question incorrectly then OCR Optical Character Recognition is carried out on the wrong elements which can lead to very poor results OCR on texts can be carried out more precisely outside the Assistant in the main screen when OCR mode has been activated Precise delineation of the text areas is performed in this way Print2CAD OCR 2013 38 4 5 Settings generated for the conversion In the fifth step our Wizard generates various alternative settings for the conversions on the basis of the details on the quality contents and scale of the drawing Start the conversion with all the suggested settings and choose the best setting on the basis of the conversion quality The settings are saved in the target directory and have the ending p4c If you wish to deactivate a particular setting just click on the corresponding checkbox best suits your needs amp Generated conversion settings _ settings 5 V Settings 2 _ settings 6 Description Settings 7 Description _ Settings 4 LlSettings 8 Description Legend 1 Video clip introduction via Kazmierczak Online Univ
29. the time The concept of a transparency group in PDF specification is independent of existing notions of group or layer in applications such as Adobe Illustrator Those groupings reflect logical relationships among objects that are meaningful when editing those objects but they are not part of the imaging model Source Wikipedia under the subject PDF License Agreement http creativecommons org licenses by sa 3 0 deed de Print2CAD OCR 2013 11 Q lt S N oO OCR 2013 1 3 What is DWG a DWG drawing is a file format used for storing two and three di mensional design data and metadata It is a native binary format for AutoCAD and other Autodesk Products Almost all of CAD Systems are able to import DWG files DWG is the native and proprietary file format for AutoCAD and a trademark of Autodesk Inc The bak drawing backup dws drawing standards dwt drawing template and sv temporary automatic save files are also DWG files Sample of binary DWG File AC1021 2 2 e 38L E oy XA O nfH 120j Utd 8b w0 1 lt gt we lt gt JOoho oH XE UA O w fvl px ow Xf 0 NDnc EHx 412 EUt4 b w t lt gt w lt gt E 4GP leBam FO OOT V v x0 Ix lt gt l l yf Print2CAD OCR 2013 12
30. will look yellow Dim the red light some and the wall will become more of a yellow green Dim the green light instead and the wall will become more or ange Bringing up the blue light a bit will cause the orange to become less saturated and more whitish In all each setting of the three dimmer switches will produce a different result either in color or in brightness or both Source Wikipedia subject RGB color space Print2CAD OCR 2013 55 Q lt S N oO OCR 2013 7 4 Assign Line Weight to Entities The program Print2CAD allows the user to assign a PDF line weight to all DWG or DXF elements Contrary to DWG elements having compulsory line weights PDF elements can have any user defined line weight The following line weights mm are permitted in DWG 0 13 Imm 0 15 mn 0 18 mn 0 20 mn 0 25 mn 0 30 fm 0 35 mn 0 40 mn 0 50 fm 0 53 mn 0 0 Im 0 70 mm 0 80 Im 0 90 mm 1 00 fm 1 06 mm 120 mm 1 40 mm 58 mm Print2CAD OCR 2013 56 Important The PDF line weight may have any user defined value for example 0 27mm or 1 675 mm Important Line weight is only available in DWG or DXF version 2004 and higher If necessary change the target version to 2004 or higher Important Line weights can also be defined as a hatch in PDF files We gave this line weight the name Line Weight Fake To test your PDF drawing please follow the steps below Turn off the
31. 0 88 Copyright c 1995 1996 Guy Eric Schalnat Group 42 Inc Libtiff Copyright c 1988 1997 Sam Leffler Copyright c 1991 1997 Silicon Graphics Inc see libtiff_license txt SGI Standard Template Library Copyright c 1994 Hewlett Packard Company Copy right c 1996 1997 Silicon Graphics Computer Systems Inc Siehe sgistl_license txt Zlib Copyright C 1995 2002 Jean loup Gailly and Mark Adler Teigha for dwg files 2003 2012 by Open Design Alliance All rights reserved DWG is the native and proprietary file format for AutoCAD and a trademark of Au todesk Inc CxImage c 07 Aug 2001 lt ing davide pizzolato libero it gt CxImage version 5 71 25 Apr 2003 Print2CAD OCR 2013 18 Print2CAD OCR 2013 19 m lt S a OCR 2013 Print2CAD OCR 2013 20 2 Installation The installation is valid for all Windows 7 XP and Vista 32 and 64 versions The below or description ofthe program concerns the installation CD ROM drive D and the target hard disk C For other drives the installation should be carried out similarly Download and burn on CD the installation program Restart your machine then insert the CD ROM in the drive Navigate to your CD ROM drive e g Explorer Start the installation by double clicking on installation program Close the info win dow with Next Answer the question of the directory where the program will be installed Default is set to C Progr
32. 1 4 What is DXF AutoCAD DXF Drawing Interchange Format or Drawing Exchange Format isa CAD data file format developed by Autodesk for enabling data interoperability between Au toCAD and other programs Q lt S N oO OCR 2013 DXF was originally introduced in December 1982 as part of AutoCAD 1 0 and was intend ed to provide an exact representation of the data in the AutoCAD native file format DWG Versions of AutoCAD from Release 10 October 1988 and up support both ASCII and binary forms of DXF Earlier versions support only ASCII Sample of DXF File 0 SECTION 2 HEADER 9 ACADVER 1 AC1015 9 ACADMAINTVER 70 6 9 DWGCODEPAGE 3 Print2CAD OCR 2013 13 1 5 System Requirements Input PDF all Versions Raster and Vector TIFF JPEG GIF PNG HPGL HPGL 2 DWF 2D Output DWG all versions as RealDWG fully compatible with AutoCAD AutoCAD LT and all other CAD systems DXF all versions Version 12 2000 2013 compatible for all CAD systems TIFF JPEG PNG GIF BMP RAW PDF Patent Pendings German Patents Pending 10 2006 015 957 8 10 2007 003 485 9 and 10 2007 046 116 1 System Requirements 32bit Win 8 Win 7 Windows Vista Enterprise Business Ultimate Home Premium SP1 Windows XP Professional Home Edition SP2 or above 64bit Win 8 Win 7 Windows Vista Enterprise Business Ultimate Home Premium SP1 Windows XP Professional x64 Editio
33. 24 Calibration of Coordinates 24 1 Basics of the Calibration Problem 24 2 Activation of the Coordinate Calibration Index Print2CAD OCR 2013 8 122 123 124 125 126 128 128 128 129 129 129 130 132 133 133 134 134 136 140 140 142 145 Print2CAD OCR 2013 9 m lt S a OCR 2013 1 Introduction 1 1 What is Print2CAD Print2CAD is an application that converts PDF files into aDWG or DXF file that can be imported and edited into any CAD system Print2CAD also converts PDF into raster formats TIFF JPEG etc Print2CAD also converts DWG or DXF files into PDFs Print2CAD is a stand alone program that works independently with all CAD systems In other words you do not need a CAD program to use Print2CAD Print2CAD is based on the original Adobe PDF libraries and converts files directly into DWG DXF or raster files The resulting files then have excellent accuracy and quality Print2CAD also supports the newest version of PDF Print2CAD converts files into DWG version 14 2000 2011 or DXF version 12 2000 2011 All vectors lines circles arcs surfaces splines text and pixel images are trans ferred into DWG or DXF The pixel images can be converted into vectors embedded or stored in separate files Special functions generate circles and arcs PDF layer structure is supported or if not available in the file this can be created on the basis of color or line widths PDF characters
34. Adobe Rea File Edit View Document Tools Figure PDF file suitable for a vectorization along the center of the pixel traces Print2CAD OCR 2013 75 The setting Find the Center of the Pixel Traces provides poor results for filled areas in raster images In this case a line is drawn through the center of the pixel area as shown below Figure Incorrect vectorization of a pixel area in DEE u Figure Correct vectorization of a pixel trace Print2CAD OCR 2013 76 9 2 2 Find the Center of Pixel Traces and the Outline of Pixel Areas With this option the pixel areas are converted into pixel outlines as a first step Usually a maximum of 3 pixels remain as the pixel outline The thickness of the outline can be specified under Expert Settings After doing so lines get drawn along the center of the pixel traces and smoothed automatically Q lt N oO OCR 2013 r Bild2 pdf Adobe Rea File Edit View Document Tools File Edit View Document Tools Window Help 46 69 x 33 19 in Figure PDF file suitable for a vectorization with contourization QUMA 20 0 QUMA 20 0 Figure Contourization of a pixel area Print2CAD OCR 2013 77 9 2 3 Find the Outlines of the Pixel Areas When selecting this option the outlines of the pixel traces and areas will be converted along the boundary line and smoothed automatically
35. CR 2013 50 6 3 Rotation of Coordinates The user can specify the rotation angle for their converted files Q lt N oO OCR 2013 When converting from PDF to DWG or DXF the arrangement of the coordinates of the PDF paths are used and any potential display rotation of the PDF representation is ignored Due to this reason the converted data may be displayed in a different rotation angle in the DWG or DXF than a PDF reader Figure Rotation of Coordinates Print2CAD OCR 2013 51 Factors selected by the user are added to every coordinate PDF files often include invisible white elements placed on a white background It is pos sible to delete these elements during the conversion to decrease file size and conversion time The limiting magnitude of color bightness from 1 to 255 can be determined E SST ms Verdeckte Fl che pdf Eile Edit View Document Tools Window Help x X oO _ 8 2 g 19 ik L gt 5 m 2na E 16 54 x 11 69 in igh _Anschlussblatt 0 LAPAO1_DWG Fertig des DWG Ferti Modell 4 Figure Purging of bright elements on bright background 7 Recognition Purge Layer Colors Optimi of Vector fon Purge Layef Colors PDF Text _ Normalize J amp t H
36. F or JPEG for storage printing or further manipulation which often encodes the image in a device dependent color space These images are often described as RAW image files based on the erroneous belief that they represent a single file format In fact there are dozens if not hundreds of raw image formats in use by different models of digital equipment like cameras or film scanners Source Wikipedia subject RAW License Agreement http creativecommons org licenses by sa 3 0 17 1 7 EPS Encapsulated PostScript or EPS is a DSC conforming PostScript document with additional restrictions which can be used as a graphics file format In other words EPS files are more or less self contained reasonably predictable PostScript documents that describe an image or drawing and could be placed within another PostScript document At minimum an EPS file contains aDSC comment describing the rectangle containing the image described by the EPS file Applications can use this information to lay out the page even ifthey are unable to directly render the PostScript inside EPS together with DSC s Open Structuring Conventions form the basis of early versions of the Adobe Illustrator Artwork file format Source Wikipedia subject EPS License Agreement http creativecommons org licenses by sa 3 0 Print2CAD OCR 2013 106 17 2 Raster Image Color Depth PDF to Raster Conversion File Type Pages
37. Kazmierczak Online University 2 Notes on the conversion step 3 Selection of the conversion method 4 Selection of the target format Print2CAD OCR 2013 30 The program supports the following format versions PDF all Adobe compatible 2D versions as of June 2012 HPGL HP GL 2 and HP RTL DWF all 2D versions as of June 2012 TIFF JPEG GIFF and PNG all versions as of June 2012 DWG versions 14 to 2013 compatible as RealDWG from Autodesk DXF versions 14 to 2013 compatible as RealDWG from Autodesk With PDF formats it is essential to make a distinction between PDFs with native PDF elements such as paths cross hatching text etc and those PDFs with an inserted raster image of a drawing that needs to be vectorized during the conversion with all the disa dvantages involved in a conversion from raster to vector With DWG and DXF formats as target formats of the conversion it is essential to note that Print2CAD supports RealDWG as the end format which ensures 100 compatibility with AutoCAD programs Print2CAD OCR 2013 31 Q lt S N i oO OCR 2013 4 2 Selection of the files and the target directory The Wizard converts any desired number of files in one run The converted files are saved in the target directory which is selected prior to conversion in the area below the file display area If no target directory was selected the converted files are saved in the same directory as that of the source file
38. Paper Farallon Replica and even Adobe s own PostScript format ps in those early years the PDF file was mainly popular in desktop publishing workflow In 1995 AT amp T Labs commenced work on another electronic document standard targeted at libraries and archives for pre serving their books and documents DjVu This standard has evolved into the djv djvu format which has had growing success and penetration in the online world for eBooks catalogs and image sharing pry The original imaging model of PDF was like PostScript s opaque each object drawn on the page completely replaced anything previously marked in the same location In PDF 1 4 the imaging model was extended to allow transparency When transparency is used new objects interact with previously marked objects to produce blending effects The addition of transparency to PDF was done by means of new extensions that were designed to be ignored in products written to the PDF 1 3 and earlier specifications As a result files that use a small amount of transparency might view acceptably in older viewers but files making extensive use of transparency could view completely wrongly in an older viewer without warning The transparency extensions are based on the key concepts of transparency groups blend ing modes shape and alpha The model is closely aligned with the features of Adobe Illustrator version 9 The blend modes were based on those used by Adobe Photoshop at
39. Print2CAD OCR 2013 40 4 7 Reusing optimal settings The saved settings p4c files can be reused in the main screen Do this by starting the program in the main menu and load the settings with the Load settings function in the program Q lt S N w oO OCR 2013 Print2CAD Conversion Wizard Analysis Name Size Path Vectorization Convert PDF to DWG DXF Convert HPGL to DWG DXF Convert DWF to DWG DXF Convert TIFF JPEG to DWG DXF Convert PDF to TIFF JPEG Convert DWG DXF to PDF DWG DXF to PDF Settings Optimization E Save Converted File to Source Directory V Save Converted File to the Following Directory C Seminar PDF Target Directory View DWG Print2CAD OCR 2013 41 5 Main Menu Print2CAD TM OCR 2013 Start Configuration Name Size Path Analysis Vectorization Convert PDF to DWG DXF Convert HPGL to DWG DXF Convert DWF to DWG DXF Convert TIFF JPEG to DWG DXF Convert PDF to TIFF JPEG Convert DWG DXF to PDF DWG DXF to PDF Settings Optimization E Save Converted File to Source Directory F Save Converted File to the Following Directory Assen on ng Yad Starting the PDF Viewer PDF File Analysis Settings Vectorization of Raster Pictures Settings
40. Print2CAD OCR 2013 71 Q lt N w i oO OCR 2013 9 Vectorization of Raster Pictures 2 3 4 tgrization in Color ith Threshold for Black and Wifite ectorization in Black afld White With Threshold for Black V Vectorization with Original Resolution Fill Small Holes in Pixelffraces Double Resolution Enhanced Results Fill all Holes in Pixel Faces Activate Smoothing Iterations of Polylines Cleanup of Free ffixels Close Open Pix l Traces Horizontal and Vertical Lines Recognition Recognition of Lines at 45 Degrees Indination Thicken Pixel Traces Cirdes and Arcs Recognition Thin the Pixel Traces Selection of Vectorization Options Smoothing of the polylines after the vectorization Generation of Horizontal Vertical and Inclined 45 Degree Lines Combining Vectorization Elements to a Block Selection of the Color Palette of the Vectorization Possibilities to Improve the Raster Image Prior to the Vectorization Se eee Print2CAD OCR 2013 72 9 1 Basics of Vectorization The program can convert scanned engineering and site plans with the help of OCR or vectorization to DWG or DXF format It is important to know that vectorization and OCR Optical Character Recognition are two completely different procedures that convert raster
41. When vectorizing in black and white the user defined threshold for what is black assigns all such pixels the color black All remaining pixels are assigned the color white R Color1 l R G Color2 l R Color 4 G 0 Black White 255 Figure Diagram of the transformation of bright pixels to the color white or dark pixels to the color black with the help of thresholds Print2CAD OCR 2013 92 Qg OR gt EG R l l I we Greyl 5 l l l l l I R l I Grey 2 S l l l l I Grey 3 S BEE I l l R I Grey4 l l l I 0 Black White 255 Figure Diagram of the conversion of light gray or white pixels in the color of pixels in the color black or dark grey using thresholds Color is gray when R G B Print2CAD OCR 2013 93 12 Vectorization Expert Settings This menu is used when you want to refine the vectorization of raster images A good understanding of vectorization methods is necessary here To reset the optimimum set tings please press the button Reset to optimum 1 Contouring of Pixel Areas 2 Vectorization Parameters 3 Reset to Optimal Values Emergency Button Print2CAD OCR 2013 94 12 1 Smoothing of Polylines The polylines must be smoothed out after vectorization The less smooth the line prior to vectorization the less smooth the final converted line and in fact it may be wavy or jagged depending upon the quality of the original file
42. age For example the 1058x1058 Wikipedia logo which occupies about 271 KB in the lossless PNG format takes about 3358 KB as a 24 bit BMP file Uncompressed formats are generally unsuitable for trans ferring images on the Internet or other slow or capacity limited media Source Wikipedia subject BMP License Agreement http creativecommons org licenses by sa 3 0 17 1 4 PNG Portable Network Graphics PNG is a bitmap image format that employs lossless data compression Creation of PNG is to improve upon and replace GIF Graphics Interchange Format as an image file format not requiring a patent license Pronunciation is p y ping or pee en gee The PNG acronym is optionally recursive unofficially standing for PNG s Not GIF PNG supports palette based palettes of 24 bit RGB or 32 bit RGBA colors grayscale grayscale with alpha RGB or RGBA images PNG used for trans ferring images on the Internet not for print graphics and so does not support none RGB color spaces such as CMYK Source Wikipedia subject PNG License Agreement http creativecommons org licenses by sa 3 0 17 1 5 GIF The Graphics Interchange Format GIF is a bitmap image format that was introduced by CompuServe in 1987 and has since come into widespread usage on the World Wide Web due to its wide support and portability The format supports up to 8 bits per pixel thus allowing a single image to reference a palet
43. alues of the colors used in a PDF into the resulting DWG or DXF elements Important The color Black in a PDF is converted into the color White in RGB The color White in a PDF is converted into the color White in RGB It is possible you are working on a white background with white elements if your converted file doesn t show any detail on the screen White on white will neither plot nor print Our suggestion for a solution is simply activate the option Assign 10 Index Colors before converting your file Definition of RGB color space An RGB color space is any additive color space based on the RGB color model A par ticular RGB color space is defined by the three chromaticities of the red green and blue additive primaries and can produce any chromaticity that is the triangle defined by those primary colors The complete specification of an RGB color space also requires a white point chromaticity and a gamma correction curve RGB is an acronym for Red Green Blue An RGB color space can be easily understood by thinking of it as all possible colors that can be made from three colourants for red green and blue Imagine for ex ample shining three lights together onto a white wall one red light one green light and one blue light each with dimmer switches If only the red light is on the wall will look red If only the green light is on the wall will look green If the red and green lights are on together the wall
44. am Files Print2CAD 2013 Installation on a network directory is not recommended because the program can use a large amount of network bandwidth and resources Install the program on a local hard drive Wait until the install is finished The installation program will decompress the pro gram files and copy them into the program directory Finish the installation and restart your computer Activate the program using your License ID and password Print2CAD OCR 2013 21 Q lt S N oO OCR 2013 3 Conversion of Different PDF Formats Invented by Adobe systems in 1993 the portable document format PDF is a data format for documents which can be used 5 on many different platforms In the last few years the PDF format has had unrivaled success and is not only for text documents but can also be implemented for blueprints from CAD software The ground breaking idea behind the success is the scalability of the document The scalability of PDF is possible because PDF is vector based and not pixel based This allows you to enlarge a blueprint and still keep the original clarity of the drawing when printing The layer technology allows one to print or omit any layers or groups of layers The native PDF text format allows a search of a document with keywords In short PDF is incredible for the use of CAD Unfortunately the possibilities of the PDF exchange are often not used A lot of files that are called PDF ar
45. any and all disputes arising from or related to this contract Only substantive German law shall be applicable to this contract The Print2CAD software may not be made available to third parties who have connections to a data conversion service provider an applications service provider or similar company nor may it be used in a company for the purpose of offering services to third parties in the area of data conversion The rights granted to you by this license shall not imply that any rights are granted to third parties Print2CAD OCR 2013 17 Q lt S N oO OCR 2013 8 3 Copyrights Copyright 2006 2013 Kazmierczak Software GmbH Germany All rights reserved Contains Autodesk RealDWG by Autodesk Inc Copyright 1998 2012 Autodesk Inc All rights reserved PVGOUTLIB Copyright c Soft Tolls GmbH All rights reserved IMAGE POWER JPEG 2000 Copyright c 2001 2003 Michael David Adams All rights reserved See jasper_license txt OpenSSL Copyright C 1995 1998 Eric Young eay cryptsoft com All rights reserved See openssl_license txt FreeType Copyright 1996 2000 by David Turner Robert Wilhelm and Werner Lemberg http www freetype org Icclib Copyright c 1997 2002 Graeme W Gill The Independent JPEG Group s JPEG software Copyright C 1991 1998 Thomas G Lane Libpng Copyright c 1998 2002 Glenn Randers Pehrson Version 0 96 Copyright c 1996 1997 Andreas Dilger Version
46. are put together to create new texts PDF properties such as line widths and line types are also converted into CAD properties Print2CAD converts PDF colors into CAD indexed colors or full RGB colors Print2CAD also supports TTF fonts With multi page PDF documents you can specify which pages are to be converted 1 2 What is a PDF Portable Document Format PDF is a file format created in 1993 by Adobe Systems for document exchange Adobe PDF is used for representing two dimensional documents in a manner independent of the application software hardware and operating system Each Adobe PDF file en capsulates a complete description of a fixed layout 2D document that includes the fonts images and 2D vector graphics which compose the documents Lately 3D drawings can be embedded into PDF documents with Acrobat 3D using U3D or PRC and various other data formats Print2CAD OCR 2013 10 5 PDF s adoption in the early days of the format s history was slow r Adobe Acrobat Adobe s suite for reading and creating PDFs 4 was not freely available early versions of PDF had no support for external hyperlinks reducing its usefulness on the Internet the additional size of the PDF document compared to plain text meant significantly longer download times over the slower modems common at the time and rendering the files was slow on less powerful machines Additionally there were competing formats such as Envoy Common Ground Digital
47. cially numbers containing 3 and 8 should be checked to ensure that 3 and 8 have not been interchanged The same applies to 5 and 6 as well as I and 7 Important A thorough selection of the text through text areas text and numbers seperated vastly improves the quality of the text recognition eT Fle Eat View Windows Help 21x es io ka i Results will be inaccurate EEE Oo iB ee L il a eo yee Ez Print2CAD OCR 2013 132 23 Line Type Recognition With the help of Print2CAD you can recognize fragmented lines Print2CAD recognizes line types dashed and dash dot at any angle 23 1 Basics One of the problems of a line type conversion from PDF HPGL TIFF and or JPEG to DWG or DXF is that lines are everywhere The possibility to define a line with line types in PDF or HPGL files exist but it is rarely used because the line types appear inaccurate in the zoom factor In these cases a static copy of the line is created using small single lines Print2CAD 2013 has the capability to recognize similar activities and repetitive entities This is useful in these types of conversions With recognition there can still be some errors In order to minimize the number of errors the user can mark the line type areas using
48. d compression can often be achieved with an adaptive entropy encoder Such a coder estimates the probability distribution for the value of the next symbol based on the observed frequencies of values so far A standard entropy encoding such as Huffman coding or arithmetic coding then uses shorter codes for values with higher probabilities Source Wikipedia subject LZW Compression License Agreement http creativecommons org licenses by sa 3 0 Print2CAD OCR 2013 108 17 3 2 G3 G4 Compression Group 3 and 4 faxes are digital formats and take advantage of digital compression methods to greatly reduce transmission times Group 3 faxes conform to the ITU T Recommendations T 30 and T 4 Group 3 faxes take between six and fifteen seconds to transmit a single page not including the initial time for the fax machines to handshake and synchronize Group 4 faxes conform to the ITU T Recommendations T 563 T 503 T 521 T 6 T 62 T 70 T 72 T 411 to T 417 They are designed to operate over 64 kbit s digital ISDN circuits Their resolution is determined by the T 6 recommendation which is a superset ofthe T 4 recommendation Fax Over IP FOIP can transmit and receive pre digitized documents at near realtime speeds Scanned documents are limited to the amount of time the user takes to load the document in a scanner and for the device to process a digital file The resolution can vary from as little as 150 DPI to 9600 DPI or more This ty
49. data into other formats Vectorization calculates the middle of a pixel trace at the edge of the pixel area or polygon and iteratively smooths it gt gt Figure Vectorization raster image is recognized as an ellipse In the OCR process a pixel image is either recognized based on shape similarity as a symbol or is discarded Figure OCR techniques raster image is recognized as number 0 Print2CAD OCR 2013 73 Qa lt Ss N oO OCR 2013 It is due to this difference of operation that the two actions OCR and Vectorization cannot be combined and is why the OCR mode is accessed using a tool where the user tells the program what and where the text is The result of the vectorization depends entirely on the quality of the original raster file If the file is of a poor quality the resulting vectorization will likewise be poor Figure Example of a raster image vectorization with poor quality Left Scanned file before vectorization Right Vectorized DWG file Print2CAD OCR 2013 74 9 2 Choosing the vectorization process 9 2 1 Find the Center of the Pixel Traces Q lt N i oO OCR 2013 With the help of polylines raster images can be vectorized along the center of pixel traces After setting the polylines the recognition of circles or splines follows This method is suitable for most construction plans OrOr Figure Vectorization of a circle T Bild1 pat
50. e basis of the analysis of the first file and all the other files are converted with these settings 2 All the files must be of the same type and have similar contents Sub divide your files into groups with the same contents e g files with primarily text primarily design drawings primarily filled cross hatching and areas etc and convert the relevant group separately with the corresponding settings 3 Never convert in the same group files that had been created in different ways for example files produced by scanners together with files produced by CAD sys tems Print2CAD OCR 2013 33 Q lt S N oO OCR 2013 4 3 Details on the scale colors and layers In the third step our Wizard requests details on the scale color and layers of the dra wing Depending on the answers to these questions suitable settings are generated for the conversion Please select from the options belo EN if necessary to verify your selections over Selected file Black and White File View Selected File Grey Scale File Color File Scale of Selected File ayer of Selected Drawing No Scale Information Found Y Layer Recognition Based on Colo Scale Information Found _ Convert Exi ing Layer Structure Tale Number of Existing Layers Geo ns Legend Video clip introduction via Kazmierczak Online University Notes on the conversion step View of select
51. e conversion method and the target formats 30 4 2 Selection of the files and the target directory 32 4 3 Details on the scale colors and layers 34 4 3 1 Details on the color of the drawing 35 4 3 2 Details on the scale of the drawing 35 4 3 3 Details on the layer structure 36 4 4 Details on the contents and quality 37 4 5 Settings generated for the conversion 39 4 6 Handling the results of the conversion 40 4 7 Reusing optimal settings 41 Print2CAD OCR 2013 3 5 Main Menu 5 1 File Selection 5 2 Output Files 5 3 Target Directory for Converted Files 5 4 Conversion of Directories 5 5 Version of the Target File 5 6 Wizard 5 7 Activation of the Program depending on Purchasing Method 5 8 Load and Save Program Settings 6 Optimization Pages and Coordinates 6 1 Select of PDF pages 6 2 Scaling of Coordinates 6 3 Rotation of Coordinates 6 4 Transformation of Coordinates 6 5 Purge Bright Elements on Bright Background 7 Recognition Purge Layer Colors 7 1 Recognition of the Layer Structure 7 1 1 Assign the PDF Layer Structure to DWG or DXF if available 7 1 2 Sort Elements on a Separate Layer According to Entity Color 7 1 3 Sort Elements on Seperate Layers According to Entity Line Weight 7 2 Assign Uniform Color to All Elements 7 3 Color Palette of the DWG or DXF Files 7 4 Assign Line Weight to Entities 7 5 Hatch Conversion 7 5 1 Delete all Hatches 7 5 2 Sort Hatches onto the Layer 7 5 3 Convert Boundary of Hatc
52. e from PDF to the flat layer structure of DWG or DXF 7 1 2 Sort Elements on a Separate Layer According to Entity Color Print2CAD offers the possibility to create a layer structure based on the colors of PDF elements If the recognition function is activated all elements will be sorted by color into separate layers The layers receive the name Color Number or Color RGB Under certain circumstances this function may create a too many layers so we recommend to change the colors to 10 index colors This feature can be combined with the option Sort Elements onto Separate Layers Ac cording To Entity Line Weight 7 1 3 Sort Elements on Seperate Layers According to Entity Line Weight Print2CAD offers the possibility to create a layer structure based on the line weight of PDF elements If the recognition function is activated all elements will be sorted by line weight into separate layers The layers receive the name Width Number This feature can be combined with the option Sort Elements onto Seperate Layers According to Entity Color Important Line width is only available in DWG or DXF file version 2004 and higher Therefore if necessary change the target version to 2004 or higher Print2CAD OCR 2013 54 7 2 Assign Uniform Color to All Elements Print2CAD allows the user to assign a uniform color to all converted elements 7 3 Color Palette of the DWG or DXF Files Print2CAD allows the user to assign the RGB v
53. e really not a true PDF they are only a raster or pixel picture with a PDF frame Print2CAD OCR 2013 22 File Edit en Document MAE File Edit View Document Took Window Help Window Help Print2CAD OCR 2013 11 69 x 8 26 in lt Raster pdf Adobe Re Eh x File Edit View Document Tools Window Help File Edit View Document Tools Window Help 24 56 x 46 91 in Figure A PDF file with no native elements It contains only a raster picture Print2CAD OCR 2013 23 3 1 Vector Based Data Made from CAD Systems Vector based PDF files are the real PDF data format The native PDF entities such as polylines texts native hatches are used This kind of PDF file is created directly from a CAD application without using a plotter interface In other words it is exported into PDF not Printed To PDF This kind of PDF is excellent for converting the data into DXF and DWG The coordinates are exact enough to be used for the purpose of CAD Vektor2 pdf Adobe R Lee same Sa 7 Vektor2 pdf Adobe R W o e File Edit View Document Tools File Edit View Document Tools Window Help Window Help 11 69 x8 26 in Figure A vector based directly generated PDF file r elel _ 8 Ba NEN Befehl Figure A DWG file created from a vector based PDF file Print2CAD OCR 2013 24 3 2 Vector Based Through a Plotter Interface Exported PDF File This type
54. ed File Details on the color of the drawing Details on the scale of the drawing Details on the layer structure Os OY ee ION Print2CAD OCR 2013 34 4 3 1 Details on the color ofthe drawing Unfortunately our converter cannot rely on the color details given in the input files es pecially in the case of PDF files Very often black white files are marked as full color files which gives poor results in conversion Here the user must examine the drawing and decide which color palette should be used Press the View selected file button and view the file in the internal viewer Then decide whether the drawing is primarily black and white grey scaled or colored Here it is a matter of which color palette is important or which one predominates If for example only a logo is in color and the rest is in black and white then you can specify that the drawing is to be black and white and not colored 4 3 2 Details on the scale of the drawing Unfortunately the details on the scale of the drawing are not given either in PDF or in HPGL DWF or TIFF etc Our Wizard requires your input on the scale The coordinates ofthe drawing are scaled on the basis of these details Ifno details are given on the scale then these coordinates are output in plot or print units as appropriate The details on the scale of the drawing are used in various ways Method 1 Press the View selected file button and view the file in our internal vi
55. ed image compression defining the image s geometry For example a TIFF file is a container holding compressed lossy JPEG and lossless PackBits compressed images Source Wikipedia subject TIFF License Agreement http creativecommons org licenses by sa 3 0 Print2CAD OCR 2013 103 Q lt N A OCR 2013 17 1 2 JPEG In computing JPEG pronounced dzer1peg jay peg is a commonly used method of lossy compression for photographic images The degree of compression can be adjusted allowing a selectable tradeoff between storage size and image quality JPEG typically achieves 10 1 compression with little perceptible loss in image quality JPEG compression is used in a number of image file formats JPEG is the most common image format used by digital cameras and other photographic image capture devices along with JPEG JFIF it is the most common format for storing and transmitting photographic images on the World Wide Web These format variations are often not distinguished and are simply called JPEG The name JPEG stands for Joint Photographic Experts Group the name of the committee that created the JPEG standard and also other standards It is one of two sub groups of ISO IEC Joint Technical Committee 1 Subcommittee 29 Working Group 1 ISO IEC JTC 1 SC 29 WG 1 titled as Coding of still pictures The group was organized in 1986 issuing the first JPEG standard in 1992 which was approv
56. ed in September 1992 as ITU T Recommendation T 81 and in 1994 as ISO IEC 10918 1 The JPEG standard specifies the codec which defines how an image is compressed into a stream of bytes and decompressed back into an image but not the file format used to contain that stream The Exif and JFIF standards define the commonly used formats for interchange of JPEG compressed images On the other hand JPEG is not as well suited for line drawings and other textual or iconic graphics where the sharp contrasts between adjacent pixels cause noticeable artifacts Such images are better saved in a lossless graphics format such as TIFF GIF PNG or a raw image format Source Wikipedia subject JPEG License Agreement http creativecommons org licenses by sa 3 0 17 1 3 BMP The BMP file format sometimes called bitmap or DIB file format for device indepen dent bitmap is an image file format used to store bitmap digital images especially on Microsoft Windows and OS 2 operating systems Many older graphical user interfaces used bitmaps in their built in graphics subsystems i e the Microsoft Windows and OS 2 platform s GDI subsystem where the specific format used is the Windows and OS 2 bitmap file format usually named with the file Print2CAD OCR 2013 104 extension of BMP or DIB Uncompressed bitmap files such as BMP are typically larger than compressed with any of various methods image file formats for the same im
57. ed to be exact with the line in the drawing The selection is sufficiently accurate if the red line covers the dashed lines completely Max Pattern Length Print2CAD OCR 2013 136 print2cad exemplepot Adobe Reader EE Datei Bearbeiten Anzeige Dokument Werkzeuge Fenster Hilfe Q lt N i gt DL OCR 2013 Figure A PDF file with dashed and dash dot line types Print2CAD OCR 2013 137 OCR Text Recognition Line Type Recognition E No OCR Recognition of Linetypes V Manual OCR Recognition of Linetypes at any Angle Create a New List of Line Type Areas Maximum Pattern Length 9 02500 inch CI 4 File Edit View Windows Help No 1 1042 2 2297 3 2273 i Prm2cAD Kazer t ox 35 14 125 126 50 0 15 9 365 Piso 0 15 8 260 26 126 Print2CAD OCR 2013 138 Dawe Due
58. eights M Entities Oni ate Layers ding to PDF Layers if vailable 7 Entities Separate According to the sg al Entiti to Separate s According to the Line Weight F Purge Distance Py Vertexes Data jon Max fAngle Alterngfon 20 0 tg4res 0 0000394 Inch F Delete Sh Data Reducti 0 003937 _ Inch V Generate Cirdes and Tolerance 5 000000 of Radius Assign RGB Assign 256 Colors ln TT 70 7 11 Assign Main 10 Index Colors m E Assign uniform color to all entis s 7 Assign Line Weight to Bf ties Scale Factor 10 al Hatch Layer name Cx Recognition of the Layer Structure Delete Short Lines Data Reduction Generate Circles and Arcs Color Palette of the DWG or DXF Files Assign Line Weight to Entities Hatch Conversion SAP ey S Purge Short Distance Polyline Vertexes Data Reduction Print2CAD OCR 2013 53 Q lt g i o OCR 2013 7 1 Recognition of the Layer Structure Print2CAD offers various possibilities to assign a layer structure to the resulting DWG or DXF file 7 1 1 Assign the PDF Layer Structure to DWG or DXF if available When creating a PDF file a PDF layer structure can be assigned Unfortunately this feature is rarely used The layer structure in PDF has a tree like structure In contrast the layer structure in DWG or DXF is flat Print2CAD offers the possibility to convert the tree like structur
59. ential damages of any nature including without limitation lost business profits or liability or injury to third persons whether foreseeable or not regardless of whether Licensee or its suppliers have been advised of the possibility of such damages You are not entitled to loan rent nor to use it as the basis for software programs of your own Kazmierczak Software GmbH Germany expressly forbids the use of Print2CAD software in applications or systems in which as far as it is possible to judge malfunc tions of this software can be expected to cause physical damage or injury resulting in death You may only use the program in an environment of this kind at your own risk Kazmierczak Software GmbH shall not assume any liability whatsoever for damages or losses due to such prohibited use A guarantee shall only be granted for faults claimed within six 6 months of the purchase of this Print2CAD licence Obvious defects in the software must be specified within four 4 weeks of their discovery If the software is defective Kaz mierczak Software GmbH shall be entitled at its own discretion to either supply a replacement or return the purchase money You are strongly advised to test new software thoroughly in an uncritical environment before putting it to actual use You shall bear the entire risk of being able to use the program for your intended purpose The District Court of Stuttgart Germany shall have exclusive jurisdiction over
60. eparated Zoom to size of the window Zoom window Deleting an area or back to last action Horizontal text areas Vertical text areas SO ae Ee Ye eee Baseline of text area Print2CAD OCR 2013 127 Q lt N i oO OCR 2013 22 2 2 Adjusting the Outlined Areas The outlined text areas need to be cleansed of waste lines This happens based on the knowledge that most lines overlap the outlined text areas and are connected to other lines in the same area When adjusting the text areas all pixel traces will be deleted which will also cut the borders of the text areas This process happens automatically during the conversion The graphics below can visually explain this procedure 22 2 3 Recognition of Pattern 22 2 3 1 Correcting Errors at the Pixel Level The proximity ofrough pixels to adjacent pixels can be corrected by deleting single pixels or adding missing pixels By doing so the recall ratio is raised when matching patterns It is however highly dependent on the contrast of the file Print2CAD OCR 2013 128 22 2 3 2 Pattern Matching Mapping The pixel patterns of the text area are compared with patterns in the data base and then m lt N E rough digitals are created E OCR 2013 22 2 3 3 Error Correction on Plane of Projection The rough digitals are compared with dictionaries Intelligent Character Recognition ICR and evaluated in regards to their probable correctness by
61. ersity 2 Notes on the conversion step 3 Information on the generated settings 4 Activation or deactivation of the relevant settings 5 Start of the conversion with the activated settings Print2CAD OCR 2013 39 Q lt N i oO OCR 2013 4 6 Handling the results of the conversion In the last step the Wizard converts all the selected files using the selected settings The files are saved in the target directory and are given the ending settings number dwg or settings number dxf as appropriate The settings for the relevant conversion are saved under the name settings number p4c The settings can be reused in the main screen The converted DWG or DXF files can be viewed using the built in DWG DXF viewer Note also the information on the converted files Now view the converted files They will be named PFint2CAD your file name Settings x The x will be the se triGs number from the previous menu Now choose which file provides the best conversion Conversion Finished View DWG DXF The converted files are saved in C Seminar PDF directory The conversion settings p4c are saved and you can use these settings for future conversions in the Main Menu Legend 1 Video clip introduction via Kazmierczak Online University 2 Notes on the conversion step 3 Integrated Viewer for DWG or DXF files 4 Notes on the converted files
62. ert All Layouts and Model Space All layouts and the model space of the DWG or DXF will be output as a PDF with seperate pages Q lt N i oO OCR 2013 Figure Example a model space of DWG or DXF file 19 12 Scale Text Width By activating this function all text widths are scaled by the given factor Figure Example a layout of DWG or DXF file Print2CAD OCR 2013 119 19 13 Set Line Width to 0 0 With this function all line widths are set to the value 0 0 19 14 PDF Version This allows the selection of what version of PDF to be output 19 15 Paper Format Set the dimensions of the PDF sheets here Figure Print margins of a PDF file 19 16 Font Directory The software Print2CAD includes original AutoCAD 2013 fonts These fonts are saved in the program directory Print2CAD 2013 Fonts If you are using your own fonts in a DWG or DXF drawing you can use these fonts SHX or TTF files by either copying them in the directory Fonts or putting the fonts in the same directory as the DXF or DWG The user may override the standard directory by choosing his own directory with fonts If this is the case Print2CAD will not search for fonts in the standard directory Fonts anymore but in the chosen directory Print2CAD OCR 2013 120 20 Normalization of Text Hights With the aid of Print2CAD text heights can be normalized in the converted DWG or DXF file This is done by specifying the
63. es Coordinates Optimization PDF Text Normalize Text Heig C Convert All Pages in One Run 4 Convert Only the Selected Pages For Exafnple 2 4 5 7 1 n Coordinates Free Rotation Degree 0 000000 Example 1 4 8 10 12 Print2CAD will convert pages 1 4 8 9 10 and 12 For PDF to raster conversion the settings shown in the above interface will have no effect To select specific pages of a PDF to convert into a raster file please go to the PDF to Raster menu As shown below Ta 7 PDF in Raster Konvertierung E Print2CAD OCR 2013 49 6 2 Scaling of Coordinates Coordinates in PDF files are usually in a resolution of 72dpi 72dpi means that one inch 25 4 mm equals 72 pixels A PDF file can have the accuracy of 25 4 72 0 35 mm or 1 72 inch A 1200 dpi resolution would make a PDF file with 18 5 72 1200 1 1 mm or 1 24 inch accuracy These types of high resolution PDF files are rare Unfortunately the scale of a PDF drawing can only be retrieved from the header of a construction plan Find the scale in the header and input it as a scaling factor for the coordinates e g the scale per the header is 1 50 and therefore the the scaling factor is 50 72 dpi 72 point one Inch Figure PDF Coordinates with resolution of 72dpi Benchmark size ofthe Eu plan Figure Retrieving the scale and plan size from the PDF Print2CAD O
64. etween the sections Figure Parameters Ifa section is less than the parameter d then the next point is deleted if the angle be tween the sections is smaller than Alpha Assigning the angle Alpha helps to not truncate polyline details like corners for ex ample the lower left corner of figure 2 in graphic below Print2CAD OCR 2013 62 7 8 Delete Short Lines Data Reduction Some PDF files contain paths with many small lines This happens mostly when dotted lines have been generated in PDF files as single lines These single lines can easily be converted to PDF as the paths do not have many parameters or properties After the conversion in DWG or DXF every line will be a full CAD line and may feature many additional parameters and properties This data may strain the capacities of a CAD system and RAM The minimum allowed line length can be set with the parameter d Ifa line is smaller than parameter d the line gets deleted Important Dotted lines or hatches may be deleted completely and therefore may not be avail able in the created DWG or DXF file Print2CAD OCR 2013 63 Q lt S N oO OCR 2013 8 Conversion of native PDF texts ih the Following TTF Font Arial Arial ttf v Replace All Fonts With Following SHX Font isocp shx X Create Text as Seperate Strings Scale
65. ewer Look in the table header of the drawing for the scale details and input the details that you have found into the wizard If the details given in the header are correct then the coordinates will be scaled correctly Method 2 Press the View selected file button and view the file in our internal viewer Activate the measuring function in the viewer and measure a dimensioned section in the drawing Correspondingly input the values that were determined into the wizard For example if a measured section of 15 8 m 15 800 mm results in a measured section of 311 2 then the scaling factor is 311 2 15800 Method 3 If you determine after the conversion that the coordinates show a considerable precision error then it is necessary to carry out a calibration operation using calibration points The calibration cannot be carried out in our Wizard Instead you have to start the program in the main menu and start up the OCR mode Print2CAD OCR 2013 35 DO lt S N oa OCR 2013 4 3 3 Details on the layer structure Press the View selected file button and view the file in our internal viewer You can see a listing of the layers on the left hand side of the viewer Check whether this layer struc ture is actually used by switching the individual layers on and off Then decide whether to use the existing layer structure or instead to create a new structure on the basis of the colors and types of elements Print2CAD
66. for Conversion Resolution dpi Anti Aliasing Method Compression Method Crop to Drawing Border Color depth or bit depth is a computer graphics term describing the number of bits used to represent the color ofa single pixel in a bitmap image or video frame buffer This concept is also known as bits per pixel bpp particularly when specified along with the number of bits used Higher color depth gives a broader range of distinct colors Color depth is only one aspect of color representation expressing how finely levels of color could be expressed formally gamut depth the other aspect is how broad a range of colors could be expressed The RGB color model as used below cannot express many colors notably saturated colors such as yellow Thus the issue of color representation is not simply a sufficient color depth but also broad enough gamut Source Wikipedia subject Color Depth License Agreement http creativecommons org licenses by sa 3 0 Print2CAD OCR 2013 107 Q lt S N oO OCR 2013 17 3 Raster Image Compression Image compression is the application of data compression on digital images In effect the objective is to reduce redundancy of the image data in order to be able to store or transmit data in an efficient form A chart showing the relative quality of various jpg settings and also compares saving a file as a jpg normally and using a save for web techni
67. h 7 6 Generate Circles and Arcs 7 7 Purge Short Distance Polyline Vertexes 7 8 Delete Short Lines Data Reduction 8 Conversion of native PDF texts 8 1 Types of Text in PDF Files 8 2 Output Text as Text Strings 8 3 Sort Text Onto Separate Layer 8 4 Scale Factors for Blank Space Width 8 5 Scale Factors for Text Width and Height 8 6 Replace All Fonts With a SHX ot TTF Font Print2CAD OCR 2013 4 42 43 44 44 44 44 45 46 47 48 49 50 51 52 52 53 54 54 54 54 9 Vectorization of Raster Pictures 72 Q gt 9 1 Basics of Vectorization 73 9 a 9 2 Choosing the vectorization process 75 ic 9 2 1 Find the Center of the Pixel Traces 75 O 9 2 2 Find the Center of Pixel Traces and the Outline of Pixel Areas 77 9 2 3 Find the Outlines of the Pixel Areas 78 9 3 Improvement of the Vectorization Process 79 9 3 1 Recognition of Horizontal and Vertical Lines 79 9 3 2 Recognition of Inclined Lines 79 9 3 3 Circle and Arc Recognition 80 9 4 Improving Pixel Images Before the Vectorization 80 9 4 1 Filling Small Holes in the Pixel Traces 81 9 4 2 Filling All Holes in the Pixel Traces 81 9 4 3 Thinning Out the Pixel Lines 81 9 4 4 Making the Pixel Traces Thicker 81 9 4 5 Removal of Free Pixels 82 9 4 6 Closing Slightly Opened Pixel Traces 83 9 5 Color Palette of the Vectorization 84 9 5 1 Black and White Vectorization 84 9 5 2 Color Vectorization 84 9 6 Interconnecting the Vectorization Elements to a Block 84 9 7 Activating
68. icities of the red green and blue additive primaries and can produce any chromaticity that is the triangle defined by those primary colors The complete specification of an RGB color space also requires a white point chromaticity and a gamma correction curve RGB is an acronym for Red Green Blue An RGB color space can be easily understood by thinking of it as all possible colors that can be made from three colourants for red green and blue Imagine for example shining three lights together onto a white wall one red light one green light and one blue light each with dimmer switches If only the red light is on the wall will look red If only the green light is on the wall will look green If the red and green lights are on together the wall will look yellow Dim the red light some and the wall will become more of a yellow green Dim the green light instead and the wall will become more orange Bringing up the blue light a bit will cause the orange to become less saturated and more whitish In all each setting of the three dimmer switches will produce a different result either in color or in brightness or both An LCD display can be thought of as a grid of thousands of little red green and blue light bulbs each with their own dimmer switch The gamut of the display will depend on the three colors used for the red green and blue lights A wide gamut display will have very saturated pure light colors and thus be able
69. ing Method Compression Method Y Crop to Drawing Border Print2CAD OCR 2013 102 17 1 Raster Target Format PDF to Raster Conversion File Type Pages for Conversion Resolution dpi Anti Aliasing Method Compression Method V Crop to Drawing Border Kr 17 1 1 TIFF Tagged Image File Format abbreviated TIFF is a file format for storing images pop ular among Apple Macintosh owners graphic artists the publishing industry and both amateur and professional photographers in general As of 2009 it is under the control of Adobe Systems Originally created by the company Aldus for use with what was then called desktop publishing the TIFF format is widely supported by image manipula tion applications by publishing and page layout applications by scanning faxing word processing optical character recognition and other applications Adobe Systems which acquired Aldus now holds the copyright to the TIFF specification TIFF has not had a major update since 1992 several Aldus Adobe technical notes have been published with minor extensions to the format and several specifications have been based on the TIFF 6 0 including TIFF EP ISO 12234 2 and TIFF IT ISO 12639 TIFF is a flexible adaptable file format for handling images and data within a single file by including the header tags size definition image data arrangement appli
70. large or reduce the line weights in the PDF Set the factor to 0 10 as shown in our example above and the results of the the line weights will be 0 18 0 25 and 0 35mm after the conversion r Bild1 pdf Adobe Rea alEhE Eile Edit View Document Tools Window Help x PDF Graphic Free line weights in the PDF and the selected line weights in the DWG file 7 5 Hatch Conversion When working with PDF there is not much difference between paths and hatches PDF hatches are defined as paths with the annotation filled This increases the load speed of the PDF file However DWG or DXF files may open very slowly when featuring numerous hatches A real hatch in a DWG or DXF file features many additional attributes and qualities Therefore a hatch may be a heavy burden for the load speed of a CAD drawing Print2CAD OCR 2013 58 Although AutoCAD is able to handle the impressive amount of about 10 000 hatches it slows down the program However many other CAD systems are not able to handle such a large amount of hatches Print2CAD has a maximum amount of 1000 hatches set for the conversion If a PDF features more than 1000 hatches only the boundaries of the remaining hatches will be converted 7 5 1 Delete all Hatches When these features are selected the hatches are not converted and only the boundary of the hatches are represented as polylines If the PDF file was created
71. libration of the Coordinates l Automatic Calibration of the Coordinates Scale of the Drawing v V Manual Calibration of Coordinates Tolerance of the X Y Coordinates No 1 2 x Y 781 3907 5351 1077 r Bij Print2CAD KazOcritif Ji File Edit View Windows Help E v F M 150 0159 a EF 3x 365 10 0 150 zu 26 126 RR bie REN Li RE gt RE RE Print2CAD OCR 2013 143 Q lt N i oO OCR 2013 i Prhezcan Kazocr ft Fi f lel Bai Filet View windows Helo 5 U 59 w 0 15 9 150 10 15 ee ee own Activation of the input coordinates of the calibration Zoom up to the limits of the drawing Zoom window Delete a field or back of the last action X Value Calibrating Point Y Value Calibrating Point D SEE eS Print2CAD OCR 2013 144 Index 22 OR N ea 5 oO A Acrobat 11 Adjusting 128 Adobe 10 22 31 103 Adobe Reader 57 Ana
72. line weight view in the Adobe Reader under View Line Weights If the lines do not appear with line weight 0 0 then no real line weights exist but rather hatches displaying line weight When converting it can be difficult to find the appropriate line weight in DWG or DXF Document Tools GoTo Zoom Page Display BildLpdf Adobe Rea Eu Rotate View Bild1 pdf Adobe Rea Ehe File Edit View Document Tools Reading Mode H e Edit View Document Tools Window Help Full Screen Mode indow Help Menu Bar PDF Toolbars Lo Navigation Panels Tracker Automatically Scroll Shift Ctrl H Read Out Loud hatch line weight 8 29 x 11 69 in 4 8 29 x 11 69 in Figure Native Line Weight and Line Weight Fake In this case the next smallest line weight will be chosen from the table of permitted DWG line weights For Example This means that a PDF with line weight 2 7mm will be converted into a DWG with a line weight of 2 5mm Another difficulty is if multiple PDF lengths exist in the same area For example A PDF features the line weights 1 82 2 56 3 56mm Print2CAD OCR 2013 57 Q lt S N oO OCR 2013 The converted DWG will only feature one line weight which in this case would be 2 11mm which is an ISO standard line weight Our suggestion for this would be to use the scaling factor for line weights By using this factor the user can en
73. lity Drawing with good raster picture black white sharp good filled pixel areas 6 Good Quality Drawing with native PDF s elements lines Bezier splines texts as lines 7 Good Quality Drawing with good raster picture black white shooth well filled pixel areas 8 Middle Quality Drawing with raster picture black white sharp edges thin pixel trains 9 Middle Quality Drawing with raster picture black white no sharp edges thin pixel trains an Middle Aalis Demssimm mith rantar mich sen blonde habitan nharn ndnnn thin misal te iene Dash Very well applicable for the conversion very good quality of the coordinates Print2CAD OCR 2013 99 15 Batch Run with Command Line Print2CAD can be started and controlled with the help of a command line However it is important to write the program fetch in quotation marks as the path may have space characters Syntax of the command line a Path and name of the settings file with an extension p4c b Path and name of the file selected for conversion c Output path ofthe converted file Example for Print2CAD c Programs Print2CAD 2013 KAZMprint2cad32 exe a f test p4c b f test pdf c f Print2CAD OCR 2013 100 16 PDF Rights 16 1 Print Permission Ifthe file does not have permission to extract which is set by whoever created the PDF then the conversion process will require the file to be printed to
74. lysis 114 Apple Macintosh 103 Areas 77 ASCII 68 AT amp T Labs 11 AutoCAD 12 13 31 59 84 116 Autodesk 12 B bit depth 107 Bitmap 131 Blank Space Width 70 BMP 44 104 116 Breakdown Detection 126 C CAD 10 12 22 24 25 26 33 44 58 62 63 69 70 84 Caddie 12 Calibration 140 142 Calibration of Coordinates 140 CMYK 105 112 Color 84 Color Depth 107 colors 34 Colors 53 Compression 108 109 Configuration 97 Contouring 94 Contourization 77 Print2CAD OCR 2013 145 conversion 30 39 Conversion 28 58 64 102 116 Converting 86 88 coordinates 48 Coordinates 50 51 52 Correction 129 Current Layout 118 D DIB 104 dpi 25 50 DPI 109 DSC 106 DWF 14 30 35 131 140 dwg 40 DWG 10 12 14 24 25 26 27 28 30 40 42 44 51 53 54 55 56 58 62 63 68 69 71 73 84 86 89 91 97 98 101 116 133 140 dxf 40 DXF 10 13 14 24 25 26 27 30 40 42 44 51 53 54 55 56 58 62 6 3 68 69 71 73 84 86 91 97 98 101 116 133 DXGF 40 E Editable 86 embedded 68 Embedding 90 116 EPS 44 106 Extracting 90 91 F FOIP 109 font 70 fonts 68 Fonts 64 116 Free Pixels 82 Print2CAD OCR 2013 146 G G3 109 G4 109 GDI 104 GIF 14 30 44 105 H Handwritten 129 hatch 125 Horizontal Lines 88 HPGL 14 28 31 35 131 133 140 HPGL 2 14 HPGL2 30 HP RTL 31 Human Intellect 28 Human Intellect Assistant 32 34 39 40 Hybrid 27
75. n SP2 or above System Requirements Hardware 32bit Win 8 Win 7 Windows Vista Intel Pentium 4 or AMD Athlon Dual Core 3 0 GHz or above with SSE2 Technology Windows XP Intel Pentium 4 or AMD Athlon Dual Core 1 6 GHz or above with SSE2 Technology 64bit Win 8 Win 7 AMD Athlon 64 or Opteron with SSE2 Technoloy Intel Pentium 4 or Xeon with Intel EM64T Support amp SSE2 Technology RAM Win 7 Win Vista 2 GB RAM Windows XP 2 GB RAM Print2CAD OCR 2013 14 1 6 License Agreement Q On Developers nd Kazmierczak Software GmbH BackToCAD Technologies LLC 5 S Sandb hlstr 12 400 Galleria Pkwy Suite 1500 D 70794 Filderstadt Atlanta GA 30339 Germany USA Internet www dxf de www backtocad com Powered by RealDWwG Autodesk DWG is the native and proprietary file format for AutoCAD and a trademark of Autodesk 1 Waiver of Responsibility Please be informed that Kazmierczak Software GmbH and BackToCAD Technologies LLC provides PDF HPGL TIFF or JPEG to DWG or DXF conversion technology with Print2CAD Converter for personal use only not for copyrighted materials you are not the owner of Kaz mierczak Software GmbH and BackToCAD Technologies LLC waives any responsibilty for possible copyright infringements Print2CAD OCR 2013 15 2 You Agree to the Following Terms and Restrictions 1 The transfer module of Print2CAD software may be installed and used on one computer only It ma
76. nder Optimization V Ignore White Color with Threshold for White Converting PDF photos and PDF pixel traces as horizontal lines Converting PDF photos and PDF pixel traces as entities Solid Convert into black and white Convert using the whole color palette eS Print2CAD OCR 2013 86 10 1 Common Problems A pixel image PDF file that does not have lines or areas cannot be vectorized In such cases the pixel image should either be extracted to the hard disk or converted as hori zontal lines or solids Q lt N i oa OCR 2013 _Seitel pdf Ado VE File Edit View Docu File Edit View Document Tools Window Help Window Help we HE ae 36 00 x24 00 in 36 00 x 24 00 in Figure PDF with inserted photo Print2CAD OCR 2013 87 10 2 Converting Raster Images as Horizontal Lines In this setting pixels are combined to form horizontal lines This option is ideal for large pixel files with colorful images e g photos or logos PDF qian tee mm Figure Example conversion of a pixel image into horizontal lines Print2CAD OCR 2013 88 10 3 Converting Raster Images as entity Solid In this setting all pixel images are vectorized and embedded into the drawing as an entity Solid filled square All solids having close to the same color will be connected to create one solid Q lt N oO
77. ns in the horizontal and vertical directions The calibration of coordinates is based on pattern recognition methods When calibrating the coordinates a special feature is used that keeps the horizontal and vertical lines the same after the calibration PDF Path transformation into 72 dpi raster Figure Accuracy error dX and dY in a PDF file created by the 72 dpi resolution Print2CAD OCR 2013 140 Tolerance Line 1 Tolerance Figure Calibration of coordinates with the help of a Y X calibration point Calibration point Tolerance Figure Calibration of coordinates using the Y coordinate Print2CAD OCR 2013 141 OCR 2013 Q lt N oa 24 2 Activation ofthe Coordinate Calibration pe Recognition alibfation of the G6ordinates tomatic Calibray6n of the Coordinates Scale of the Dy wing 5 j Manual Calibration of Coordinatg Tolerance of the X Y Coordinates 0 0001969 Coordinate Calibration Automatic Calibration of Coordinates Based on Drawing Scale Manual Calibration of Coordinates Create New List of Coordinates Tolerance of the Coordinate Calibration List of Calibration Coordinates a OY ae eS View or Change Existing List of Coordinates Print2CAD OCR 2013 142 r Text Recognition OCR Text Recognition Line Type Recognition Coordinate Calibration No Ca
78. ny purpose End Licensees may not utilize any equipment device software or other means designed to circumvent or remove any form of copy protection used by Licensee or its licensors in connection with the Software Application or use the Software Application together with any authorization code serial number or other copy protection device not supplied by Licensee or its licensors End Licensees may not use or export the Software Applica tion outside of the country of purchase for any reason End Licensees acknowledge that the Software Application is the confidential information of Licensee and its suppliers and End Licensees agree that under no circumstances may End Licensees disclose the Software Application to any third party Title to and ownership of the intellectual property rights associated with the Software Application and any copies remain with Licensee and its suppliers End Licensees are hereby notified that Autodesk Development S a r l Rue du Puits Godet 6 CH 2005 Neuchatel Switzerland Autodesk is a third party beneficiary to this Agreement to the extent that this Agreement contains provisions which relate to End Licensee s use of the Software Application Such provisions are made expressly for the benefit of Autodesk and are enforceable by Autodesk in addition to Licensee Print2CAD OCR 2013 16 10 11 12 In no event shall Licensee or its suppliers be liable in any way for indirect special or consequ
79. of PDF is exported from a CAD programusing a plotter interface This type of PDF has only lines and hatches often with a resolution of 75 dpi Whereas in the original CAD drawing coordinates can be placed in any location plotters and printers use DPI or Dots Per Inch Thus there is a limit to the locations a coordinate can be placed When aDWG is Printed To PDF the coordinates are snapped to closest dot in the set Dots Per Inch This clearly distorts not only the scale of the entire drawing but of the elements within the drawing as well This kind of PDF is still useful for conversion The coordinates may be misaligned but often can still be used Ea 626 470A pdf Adobe Reader oo See File Edit View Document Tools Window Help x i lt i i Find r a ol 7 626 370A pdf Adobe Reader sehe Eile Edit View Document Tools Window ER Figure Vector based PDF exported through a plotter printer interface Print2CAD OCR 2013 25 Q lt S N w i oO OCR 2013 3 3 Raster Based PDF Files A raster based PDF is one containing only pixels This type of PDF data does not include any native PDF elements like lines hatches or text The quality ofthe conversion is thus based on the resolution of the scan These raster pictures have to be vectorized during a conversion to DWG or DXF This kind of PDF is not exceptable for converting the data into DXF and DWG The coordina
80. on 108 17 3 2 G3 G4 Compression 109 ke 17 3 3 JPEG Compression 109 17 4 Color Type 110 17 4 1 Grayscale Color Space 110 17 4 2 RGB Color Space 111 17 4 3 RGBA Color Space 111 17 4 4 CMYK Color Space 112 17 5 OCR Definition 112 17 6 Conversion of selected PDF Pages 113 18 Analysis of a PDF File 114 19 DWG DXF to PDF Conversion 116 19 1 PDF Header 116 19 2 Embedding Fonts 116 19 3 Geometry Optimization 116 19 4 TTF Fonts as Geometry 118 19 5 Zoom To Extensions 118 19 6 Generate PDF Layer 118 19 7 Output Disabled Layers 118 19 8 Convert Model Space 118 19 9 Convert Current Layout 118 19 10 Convert All Layouts 118 19 11 Convert All Layouts and Model Space 119 19 12 Scale Text Width 119 19 13 Set Line Width to 0 0 120 19 14 PDF Version 120 19 15 Paper Format 120 19 16 Font Directory 120 20 Normalization of Text Hights 121 Print2CAD OCR 2013 7 21 OCR Mode Text Line Type and Coordinates Recognition 22 OCR Text Recognition 22 1 General 22 2 Procedure 22 2 1 Breakdown Detection 22 2 2 Adjusting the Outlined Areas 22 2 3 Recognition of Pattern 22 2 3 1 Correcting Errors at the Pixel Level 22 2 3 2 Pattern Matching Mapping 22 2 3 3 Error Correction on Plane of Projection 22 2 3 4 Error Correction on Word Level 22 2 4 Manual Correction of the Recognized Texts 22 2 5 Text Recognition Quality 23 Line Type Recognition 23 1 Basics 23 2 Methods and Parameter 23 2 1 Activation 23 2 2 Parameter for Detecting Line Types
81. ons Consulting Inc in Danzig Poland In 2008 Andreas Kazmierczak develop Print2Cad Software In 2009 Andreas Kazmierczak founded the company BackToCAD Technologies LLC located in Atlanta Georgia His software has been used by over 30 000 clients and over 1 000 000 users Andreas Kazmierczak is currently amember ofthe Association of Consulting Engineers The Association of Consulting Engineers VBI is the leading professional organization of independent consulting and planning engineers in Germany The VBI has the highest requirements for professional qualifications independent consultant status and integrity of its members Andreas Kazmierczak is constantly seeking advancements in CAD software to ensure the best possible upgrades Print2CAD OCR 2013 2 Contents 2 2 OR Sg 1 Introduction 10 8 1 1 What is Print2CAD 10 Ea 1 2 What is a PDF 10 1 3 What is DWG 12 1 4 What is DXF 13 1 5 System Requirements 14 System Requirements 14 System Requirements Hardware 14 1 6 License Agreement 15 1 Waiver of Responsibility 15 2 You Agree to the Following Terms and Restrictions 16 3 Copyrights 18 2 Installation 21 3 Conversion of Different PDF Formats 22 3 1 Vector Based Data Made from CAD Systems 24 3 2 Vector Based Through a Plotter Interface Exported PDF File 25 3 3 Raster Based PDF Files 26 3 4 Hybrid Vector and Raster Based PDF Files 27 4 Conversion with the Help of our Wizard 28 4 1 Selection of th
82. own path for temporary files The program Print2CAD will write files in this directory Please note that the directory for temporary filess require free hard drive space with at least 10 times the size of the largest PDF file The directory needs to be easily accessible and should not be set up on a network con nection for example a directory on a server All temporary files in this folder will be deleted after an error free program execution Print2CAD OCR 2013 98 14 Wizard With the help of the wizard the optimal settings for a specific file can be carried out x oO N c m Q OCR 2013 For this purpose an image can be selected that best fits the converted file Not all PDF files include native PDF elements such as lines and circles Many PDF files consist only of an inserted raster files Again the quality of the image determines the quality of the converted file Assistent p y Please choose your case or the similar case Super Quality Drawing with native PDF s elements lines Bezier splines native texts a o 1 Super Quality Drawing with native PDF s elements lines Bezier splines native texts m 2 Super Quality Drawing with native PDF s elements lines Bezier splines texts as polylines 3 Super Quality Drawing with native PDF s elements hatches with Bezier splines border 4 Super Quality Drawing with native PDF s elements lines as hatches solid native texts 5 Good Qua
83. pe of faxing is not like the e mail to fax service that still uses fax modems Group 3 fax machines transfer one or a few printed or handwritten pages per minute in black and white bitonal at a resolution of 204x98 normal or 204x196 fine dots per square inch The transfer rate is 14 4 kbit s or higher for modems and some fax machines but fax machines support speeds beginning with 2400 bit s and typically operate at 9600 bit s The transferred image formats are called ITU T formerly CCITT fax group 3 or 4 Source Wikipedia subject G4 Compression License Agreement http creativecommons org licenses by sa 3 0 17 3 3 JPEG Compression The JPEG compression algorithm is at its best on photographs and paintings of realistic scenes with smooth variations of tone and color For web usage where the bandwidth used by an image is important JPEG is very popular JPEG Exif is also the most common format saved by digital cameras Source Wikipedia subject JPG Compression License Agreement http creativecommons org licenses by sa 3 0 Print2CAD OCR 2013 109 Q lt N oO OCR 2013 J PDF to Raster Conversion File Type TIFF Pages for Conversion Resolution dpi 300 v Anti Aliasing Method No Anti Aliasing Z Compression Method No Compression X V Crop to Drawing Border 17 4 Color Type 17 4 1 Grayscale Color Space In photography
84. per the ASCII table PDF files often use Identity H fonts with no rule regarding character encoding As we are not allowed to extract fonts from a PDF to a Windows system Print2CAD looks for similar fonts in the Windows system and defines these as substitute fonts for the DWG or DXF file getting created DWG DXF Embedded Windows fonts default fonts Figure PDF fonts and DWG DXF fonts Print2CAD OCR 2013 68 8 2 Output Text as Text Strings In PDF files text is usually defined as separate characters or groups of characters with their own insertion points With the help of special internal methods Print2CAD merges characters into strings and places these strings as text in the DWG or DXF drawing Q lt S N oO OCR 2013 PDF Text ARs Samp Tin Sn Na N te H rawing 24 Drawing 24 Figure PDF characters and character groups so called Text Runs and CAD text Print2CAD does not reconstruct text that was fragmented into lines arcs or hatches Such text is converted faithfully back into lines or hatches in the CAD drawing The same applies to text which is embedded as raster images in PDF These are not displayed as text Only real or native PDF text and characters are converted to DWG or DXF text Tole F Echter Text doc Kompat E Real text Raster file with scanned text It is a raster file Figure Real Native PDF text and text as a raster picture
85. pse or spline gt gt Figure Vectorization procedure generation of an ellipse Using the OCR procedure a pixel image gets recognized or discarded as a symbol based on its shape Figure OCR procedure generation of a character 0 Print2CAD OCR 2013 66 Raster pdf Adobe Re File Edit View Document Window Help 46 91 x 24 56 in Window Help 46 91 x 24 56 in Figure No real PDF text raster picture File Edit View Document Tools S Text Kein Text Polygon r Text Kein Text Polygon File Edit View Document Tools Window Help 496 14 u a GZL 1 8 26 x11 69 in 4 m Eile Window Help 8 26 x11 69 in 4 Figure No real PDF text text as polylines Edit View Document Tools i Vektor2 pdf Adobe R Uses File Edit View Document Tools Window Help x eid 11 69 x 8 26 in Vektor2 pdf Adobe R el Window Help 11 69 x 8 26 in File Edit View Document Tools Figure No real PDF text text as hatches Print2CAD OCR 2013 67 m lt N A OCR 2013 Another problem is created by PDF fonts as they are usually embedded in the PDF file In DWG or DXF the fonts have to be taken from the system Since the fonts are embed ded in PDF the characters are no longer coded for example
86. que Image compression can be lossy or lossless Lossless compression is preferred for archival purposes and often med ical imaging technical drawings clip art or comics This is because lossy compression methods especially when used at low bit rates introduce compression artifacts Lossy methods are especially suitable for natural images such as photos in applications where minor sometimes imperceptible loss of fidelity is acceptable to achieve a substantial reduction in bit rate The lossy compression that produces imperceptible differences can be called visually lossless Source Wikipedia subject Image Compression License Agreement http creativecommons org licenses by sa 3 0 17 3 1 LZW Compression Lempel Ziv Welch LZW is a universal lossless data compression algorithm created by Abraham Lempel Jacob Ziv and Terry Welch It was published by Welch in 1984 as an improved implementation of the LZ78 algorithm published by Lempel and Ziv in 1978 The algorithm is designed to be fast to implement but is not usually optimal because it performs only limited analysis of the data The simple scheme described above focuses on the LZW algorithm itself Many appli cations apply further encoding to the sequence of output symbols Some package the coded stream as printable characters using some form of Binary to text encoding this will increase the encoded length and decrease the compression frequency Conversely increase
87. r 26 31 Raster 27 86 Raster Image Prior 72 Raster Images 88 89 RAW 44 106 RealDWG 31 REALDWG 12 Recognition 53 79 Recognized Text 130 Removal 82 RGB 54 55 105 107 111 112 RGBA 105 111 Print2CAD OCR 2013 149 S scale 34 Scale 119 Scale Factors 70 Separate Layer 70 SHX 64 71 116 Smoothing 85 95 Sort 70 T target 30 target directory 32 Text Hights 121 text recognition 125 Text Recognition 123 132 Threshold 90 92 TIFF 10 14 28 30 35 44 101 103 106 116 133 140 Tolerance 96 Traces 77 Transformation 52 TrustedDWG 12 TTF 64 71 116 U uman Intellect Assistant 37 USB 46 vV Vector 27 vectorization 75 90 Vectorization 42 72 73 78 79 80 84 94 vectorized 26 31 87 vectorizing 66 92 Vectorizing 85 Print2CAD OCR 2013 150 W Windows 28 68 70 104 Wizard 45 Z Zoom 118 144 Print2CAD OCR 2013 151 Q lt g i o OCR 2013
88. s A separate file is created for each page of multi page PDF files e Step 2 of 5 Please choose the files you wish to convert a sg wo to save them Note You can select multipi files Source Name Size Path print2cad example 1 pdf 0 90 MB C Seminar PDI ioi S Remove Save Converted File to Source Directory l Save Converted File to the Following Directory Choose Path emei soni Lumen Legend 1 Video clip introduction via Kazmierczak Online University 2 Notes on the conversion step 3 List of selected files 4 File selection 5 Deleting a marked file from the list 6 Viewing the marked file with the aid of the built in DeepView viewer 7 Selecting the location to save the converted files Print2CAD OCR 2013 32 Depending on which type of conversion had been chosen only the appropriate file types are permitted in the selection The converted files have by default the prefix Print2CAD This prefix can be disabled in the configuration but in that case any existing files that have the same name and same extension will be overwritten without any warning Multiple converted files and the associated settings are saved in the target directory The settings file will be designated by the extension p4c Please note the following points 1 The first file in the list is the most important because the settings of the Assistant are generated on th
89. s the small holes in the pixel traces Q lt N oO OCR 2013 9 4 2 Filling All Holes in the Pixel Traces This setting allows all holes in the pixel traces to be filled 9 4 3 Thinning Out the Pixel Lines This setting removes one layer of pixels from the outer edge of the pixel trace 9 4 4 Making the Pixel Traces Thicker This setting will add a layer of pixels to the outer edge of the pixel trace Print2CAD OCR 2013 81 9 4 5 Removal of Free Pixels Often older scanned drawings will have free pixels Selecting this feature will ensure the removal of these unwanted pixels for a cleaner converted file Figure Dirt in a raster image by free pixels Figure Removal of free pixels Print2CAD OCR 2013 82 9 4 6 Closing Slightly Opened Pixel Traces Often older scanned drawings will contain open pixel traces This setting will prompt the program to close these open spaces Under For Experts Only the user is allowed to select the distance between pixels Q lt S N oO OCR 2013 Figure Removal of slightly broken lines in a raster image Print2CAD OCR 2013 83 9 5 Color Palette of the Vectorization 9 5 1 Black and White Vectorization Vectorization is executed in black and white and does not support any bright pixel colors e g cyan 9 5 2 Color Vectorization The vectorization is executed in seven primary colors index colors First the pixel image
90. slation of scanned images of handwritten typewritten or printed text into machine encoded text It is widely used to convert books and documents into electronic files to computerize a record keeping system in an office or to publish the text on a website OCR makes it possible to edit the text search for a word or phrase store it more compactly display or print a copy free of scanning artifacts and apply techniques such as machine translation text to speech and text mining to it OCR is a field of research in pattern recognition artificial intelligence and computer vision Source Wikipedia subject OCR License conditions http creativecommons org licenses by sa 3 0 Print2CAD OCR 2013 112 17 6 Conversion of selected PDF Pages For multi page PDF documents you can determine that only certain pages are converted to a raster file The page numbers must be specified and separated by a comma eg 1 4 12 34 Page ranges are indicated with a hyphen eg 12 18 lt N c A OCR 2013 Example 1 4 8 10 12 It issues the pages 1 4 8 9 10 and 12 Print2CAD OCR 2013 113 18 Analysis of a PDF File 1 List of files to be analyzed 1 2 Number of PDF page to be analyzed 2 3 Start Analysis 3 Print2CAD OCR 2013 114 Print2CAD OCR 2013 PDF Native Entities Path PDF Native Entities Hatch PDF Native Entities Text PDF Native Entities Image
91. te of up to 256 distinct colors The colors can be chosen from the 24 bit RGB color space It also supports animations and allows a separate palette of 256 colors for each frame The color limitation makes the GIF format unsuitable for reproducing color pho tographs and other images with continuous color but it is well suited for simpler images such as graphics or logos with solid areas of color GIF images are compressed using the Lempel Ziv Welch LZW lossless data compression technique to reduce the file size without degrading the visual quality This compression Print2CAD OCR 2013 105 Q lt N oO OCR 2013 technique was patented in 1985 Controversy over the licensing agreement between the patent holder Unisys and CompuServe in 1994 spurred the development of the Portable Network Graphics PNG standard since then all the relevant patents have expired Source Wikipedia GIF License Agreement http creativecommons org licenses by sa 3 0 17 1 6 RAW A camera raw image file contain minimally processed data from the image sensor of either a digital camera image or motion picture film scanner Raw files named because they are not yetprocessed and are not ready to be printed or edited with a bitmap graphics editor Normally the image processed by a raw converter in a wide gamut internal color space where precise adjustments made before conversion to a positive file format such as TIF
92. tes are of very bad quality and are not enough to be used for the purpose of CAD File Edit View Document Tools File Edit View Window Help Window Help 24 56 x 46 91 in SE Raster pdf Adobe Re Eh Eile Edit View Document Tools Window Help 24 56 x 46 91 in m Rasterbild vom Scanner als TIFF Figure A PDF with raster pictures Print2CAD OCR 2013 26 3 4 Hybrid Vector and Raster Based PDF Files This is a combination of vector and raster formats with all the pros and cons in one Q lt oO S o OCR 2013 The hybrid PDF is the real PDF file that contains the lines texts and hatches within This data also contains raster pictures In this case you have to decide how you handle the PDF raster pictures Print2CAD offers you a lot of possibilities to vectorize raster pictures This kind of PDF is very exceptable for converting the data into DXF and DWG The native PDF data will convert properly 21 90 x 30 82 in Figure A hybrid PDF file Print2CAD OCR 2013 27 4 Conversion with the Help of our Wizard Print2CAD 2013 has a Wizard that is unique throughout the world The idea behind the Assistant is that the user views the original drawing in the form of PDF HPGL DWG TIFF or JPEG with the aid of a built in viewer assesses the quality and the contents of the drawing with the aid of his own human understanding and then answers the questions posed b
93. the internal editor before executing the conversion Print2CAD OCR 2013 133 Q lt N i oO OCR 2013 23 2 Methods and Parameter 23 2 1 Activation Maximum Pattern Length 0 02500 Inch Y Begin 3457 2096 3445 Deactivation of Line Type Recognition Manual Line Type Recognition Starting the Internal Editor Maximum Pattern Length ofthe Line Recognition Correction of the Line Type Areas List of Line Type Areas Deleting the List Print2CAD OCR 2013 134 eate a New Ust of Une Type Areas Maximum Pattern Length 9 02500 Inch Modify Append View Delete list prnt2cad exomplepat Adobe Reader Datei Bearbeiten Anzeige Dokument Werkzeuge Hilfe ea Gie 1 1 iOO mm ith by max Musterlange u Datei Bearbeiten Anzeige Dokument Werkzeuge Fenster Hilfe oe IE rnio om 71 m Print2CAD OCR 2013 135 Q lt N i oa OCR 2013 23 2 2 Parameter for Detecting Line Types Print2CAD requires the user to identify the line types with inclination by using the internal editor This fairly quick process will reduce the error rate significantly To familiarize yourself with the details procedure please watch our training videos located on our website The beginning and ending of the highlight does not necessarily ne
94. time Print2caDTM OCR 2043 R mode can only con yert one file or one page of a file per run DWG 2000 2002 Z Convert PDF to DWG DXF Target Format Convert HPGL to DWG DXF Convert DWF to DWG DXF 5 Convert TIFF JPEG to DWG DXF ert PDF to TIFF JPEG Convert DWG DXF to PDF Save Converted File to Source Directory V Save Converted File to the Following Directory C Seminar PDF 1 OCR mode enable 2 Select file for OCR detections 3 OCR recognition text line type and coordinate detections Print2CAD OCR 2013 122 22 OCR Text Recognition Print2CAD can recognize text split into multiple lines polylines hatches and raster pixels using the OCR method Q lt oO S he o OCR 2013 Indude Raster Images Indude Hatches Indude Paths Path Lineweight x3 1965 Deactivation of text recognition Activate manual text recognition Indicate text areas List of text areas Preselection of text Linewidth of texts fragmented in lines SI V e W D Language of the text recognition Print2CAD OCR 2013 123 22 1 General Optical character recognition abbreviation is OCR is the mechanical or electronic trans lation of scanned images of handwritten typewritten or printed text into machine encoded text It is widely used to convert books and documents into
95. to display very saturated deep colors Source Wikipedia subject RGB Color Space License Agreement http creativecommons org licenses by sa 3 0 17 4 3 RGBA Color Space RGBA stands for Red Green Blue Alpha While it is sometimes described as a color space it is actually simply a use of the RGB color model with extra information The alpha channel is normally used as an opacity channel If a pixel has a value of 0 in its alpha channel it is fully transparent and thus invisible whereas a value of 100 in the alpha channel gives a fully opaque pixel traditional digital images Values between 0 and 100 make it possible for pixels to show through a background like a glass translucency an effect not possible with simple binary transparent or opaque transparency It allows easy image compositing Alpha channel values can be expressed as a percentage integer or real number between 0 and 1 like RGB parameters Source Wikipedia subject RGBA Color Space License Agreement http creativecommons org licenses by sa 3 0 Print2CAD OCR 2013 111 Q lt N oa OCR 2013 17 4 4 CMYK Color Space The CMYK color model process color four color is a subtractive color model used in color printing and is also used to describe the printing process itself CMYK refers to the four inks used in some color printing cyan magenta yellow and key black Though it varies by print house
96. tracting lines etc 17 28 91 49 I 16 65 91 54 N id D D n amp T 17 28 91 49 18 79 91 52 16 65 91 54 14 84 91 60 14 84 91 60 Separation off Separation on Print2CAD OCR 2013 125 22 2 1 Breakdown Detection The image file is divided into relevant fields text captions This allocation is performed by the user using a special editor The division is necessary because a computer program can not with sufficient certainty sort out of a drawing file the text lines circles arcs and separate the text from the rest of the drawing Text Recognition _ OCR Text Recognition Line Type Recognition Coordinate Calibration E No OCR Recognition of Text u Me F Manual OCR Recognition of Text Language indude Raster Images Engish v Fl Indude Hatches Eline Pats Path Lineweight 04 No x y Y2 x3 Y3 Type 592 pen z 5 Ki Print2CAD_KazOcr tif er ey tel a__ 1m Iii File Edit View Windows Help Print2CAD OCR 2013 126 Kr t2CAD_KazOgitif Ki Fik Edit View Windows Helg Kazmidlezakt Gz i Numbef Area L ER Line ype Co grdinates E E Zbom All Zoom Zoom In a Zoom Out 14 Erase I OJ Back Selecting the text areas text and numbers s
97. us formula For this you must use your intuition and ex perience to determine what the best parameter may be for the specific file To generate arcs from polylines is again a very difficult task but not impossible The radius of arcs is subject to an internal limitation because otherwise straight lines could be converted into arcs with a large radius The angle alpha ofthe generated arcs are limited to at least 20 degrees The convexity of arc W is also subject to restrictions If a polyline is not converted into an arc then it simply did not meet our internal minimum requirements DO lt S N oa OCR 2013 Important When a conversion generates arcs upside down then the radius deviation R in was set too high Figure Internal Arc Parameters in Print2CAD Print2CAD OCR 2013 61 7 7 Purge Short Distance Polyline Vertexes PDF files can contain paths with many points vertexes Even a large amount of path data can easily be processed in PDF because paths do not have many parameters and properties After the conversion in DWG or DXF every path segment becomes a full CAD line or polyline These single CAD elements may include many additional parameters and properties Therefore it is advantageous to purge the polyline points during the conversion This can be achieved by setting the following parameters d the minimum allowed segment of the polyline needs to be determined Alpha a maximum angle b
98. using an HPGL interface the hatching boundaries may have loops These loops are interpreted differently in DWG or DXF than in HPGL They are pos sibly left empty In such cases delete all hatches and only output the hatching boundaries 7 5 2 Sort Hatches onto the Layer When this feature is selected the hatches are sorted onto the given layer 7 5 3 Convert Boundary of Hatch This function outputs all hatch boundaries as polylines Print2CAD OCR 2013 59 Q lt N i oO OCR 2013 7 6 Generate Circles and Arcs Many PDF files contain circles and arcs that have been converted into polylines These polylines tend to be imprecise making it difficult to detect them as a circle or arc Although the recognition of a polyline as a circle or arc appears to be easy when one looks at a PDF a person can immediately recognize the circle or arc software has to work a little harder to do this 11 69 x 16 54 in Figure Circle in Polyline Segments Print2CAD OCR 2013 60 ei Many internal parameters were set but there is no need to disclose all of my secrets The recognition process works well in providing true circles Ifthis is notthe case with your file then it was because ofthe lack ofpolylines but rather the presence ofa chain of line segments The user can set one parameter which is the deviation of the polyline vertexes from the radius of the circle The parameter is set in of the radi
99. y not be installed on multiple computers used by different people simultaneously End Licensees agree not to alter reverse engineer or disassemble the Software Application End Licensees will not copy the Licensed Software except i as necessary to read the Software Application from the media into the memory of a computer solely for the purpose of executing it on a single machine whether a stand alone computer or a workstation component of a multi terminal system or ii to create an archival copy End Licensees agree that any such copies of the Software Application shall contain the same proprietary notices which appear on and in the Software Application End Licensees may not install access or otherwise copy or use the Software Appli cation except as expressly authorized by this Agreement End Licensees may not distribute rent loan lease sell sublicense or otherwise transfer all or any portion of the Software Application or any rights granted in this Agreement to any other person without the prior written consent ofLicensee End Licensees may not install or access or allow the installation or access of the Software Application over the Internet for the purposes of making the Software Application available to third par ties including without limitation use in connection with a Web hosting or similar services End Licensees may not modify translate adapt arrange or create derivative works based on the Software Application for a
100. y the program regarding the contents and quality of the input file Gucci B a mm Only a human being is in a position given the state of the art of the technology that is generally available today personal computer Windows operating systems 4 GB RAM etc to appraise the contents of a drawing without errors in a fraction of second He can then decide whether the drawing is a layout plan or a machine construction drawing whether there is only text in selected areas or whether there are other elements as well and whether the drawing is primarily with curves or straight lines A normal PC would require several months of computing time to make an equally valid assessment and would certainly fail due to overheating Print2CAD OCR 2013 28 As a result of the evaluation provided by the user based on his ability to make judgments and his intellect the program is in a position to make a number of optimal settings for the converted file The program creates between 2 and 8 maximum sets of settings to use when converting the file After the conversion the user looks at the drawings with aDWG DXF viewer and chooses the drawing with the best quality The settings for the selected drawing are saved and can be reused for further conversions of files of a similar type Q lt S N i lt oO OCR 2013 ee Step2 POF to TIFF JPEG PNG GIF Convert DWG DXF to POF

BackToCAD Print2CAD 2013 2U OCR

Contents

Download Pdf Manuals

Related Search

Related Contents