OCR User Manual
Contents
1. Suggested Configuration Applications where there is prior knowledge over the position of the ROI containing the string to be recognized through OCR Small shifts and rotations of the ROI for less than 2 are generally tolerated OCR with absolute ROI Applications where the position of the ROI can change in the horizontal and or vertical directions but in a limited amount A single large ROI should not be used in this case as it is faster to define a ROI that covers only the first character and from this determine the position for the ROI containing the entire string Rotations of less than 2 are generally tolerated OCR with localization through a character or a logo glyph Applications where a 1D code is present It is assumed that the string to be recognized and the code have no relative rotation Shiftings or rotation will be tolerated as long as both the string and the code remain inside the acquired image Note This application requires that distances DeltaX and DeltaY between the centre of the code and the centre of the ROI where the OCR is performed are invariant OCR with localization through a 1D code Applications where a 2D code is present It is assumed that the string to be recognized and the code have no relative rotation Shiftings or rotation will be tolerated as long as both the string and codes remain inside the acquired image Note This application requires that distances DeltaX and2. DATALOGIC User s Manual SDATALOGIC Datalogic Automation S r l Via Lavino 265 40050 Monte S Pietro Bologna Italy OCR User s Manual Ed 09 2011 2011 Datalogic Automation S r l ALL RIGHTS RESERVED Protected to the fullest extent under U S and international laws Copying or altering of this document is prohibited without express written consent from Datalogic Automation S r l Datalogic and the Datalogic logo are registered trademarks of Datalogic S p A in many countries including the U S A and the E U Matrix 210 Matrix 410 ID NET VisiSet and X PRESS are trademarks of Datalogic Automation S r l All other brand and product names mentioned herein are for identification purposes only and may be trademarks or registered trademarks of their respective owners Datalogic shall not be liable for technical or editorial errors or omissions contained herein nor for incidental or consequential damages resulting from the use of this material 13 09 11 CONTENTS REFERENCES ico ceccuuersvecnuners ect ia ia iv Reference Documentation iaa di iv DEVICES AMA SUPPOME ice sede TTEA E acca ae iv CHOOSING A CONFIGURATION ceccceceeeeeeeneeeeeeeeeeeeeeeeeeesnaseeeeeesseaeseseseeesuseeeesaseneaeseseeesessneeesessenenenees 1 Application TYPE ree ainat hesapta epea pda 1 Choosing a Proper Matrix Model for OCR ccccccceececceceeeeeeeeeeeaeeeeeeeeecaeaeeeeeeeseseeaeeeeeeesesencaeaeeeeeeeeenaees 2
3. DeltaY between the centre of the code and the centre of the ROI where the OCR is performed are invariant OCR with localization through a 2D code Typical OCV Applications such as performing OCR and matching the expected string OCR with absolute ROI Any supported configuration Applications where the position of the ROI can change in the horizontal or vertical directions but over a limited range and where vertical or horizontal bar line stripe is present they will serve used for edge detection Less than 2 rotations are tolerated OCR located through one edge change in the horizontal or vertical directions but over a limited range and where vertical or horizontal bars lines stripes are present they will serve used for edge detection Less than 2 rotations are tolerated OCR located through two edges E gt OCR USER S MANUAL 1 2 CHOOSING A PROPER MATRIX MODEL FOR OCR Choosing the correct Matrix reader model to be used in OCR applications largely depends on the size of the printed character and the desired FOV for the application The OCR algorithm is optimized for an average character height in the range 33 35 pixels with a minimum height of 28 pixels These requirements should be taken into consideration when choosing the Matrix reader model especially when Matrix 210 is involved 752x480 214 UHD 1 165x105 1150 25 4 4 30 mm 1150 5 2 752x480 40 mm 211
4. Misread a situation where the OCR result is different from what a human reads but the OCR did not know it and believed its output to be correct OCR Optical Character Recognition the process of automatically recognizing a sequence of characters numbers OCV Optical Character Verification similar to OCR but in this case there is a priori knowledge on the expected result Focus is more on the verification process rather than on the identification process Reader the device used to capture images the Matrix Reader ROI object an object performing OCR on its assigned region of interest Inside a single image there can be one or more Reader ROI objects each one of them will output the result of its recognition if capable or successful ROI Region Of Interest a bounded region to which an OCR operation refers Score characters recognized character sequences are assigned a score as an indication of the confidence level the OCR engine has over what it has yelded Training the process where the OCR engine is taught to recognize strings by feeding it with sample data and corresponding human readable strings 13 www automation datalogic com
5. S MANUAL 2 4 OCR AND EDGE SYMBOLOGIES The output of the Optical Char Recognition feature is associated with two symbologies inside the Matrix OCR OCV Symbology for all the output related to the configured readers EDGE Symbology for all the output related to the configured EDGE ROT s 2 5 OCR REFERENCE IMAGE The OCR feature uses one or more reference images for setup which is transferred within the DLR file and stored in the Matrix FLASH memory it is also used to initialize all the VisiSet OCR parameters using the DLR file configuration All the following OCR aspects configuration is entirely performed using DLReader and do not require modifications to the current VisiSet configuration Absolute ROI Localization by Blob Localization by Edge In the above cases it is not necessary to upload an image to the reader and decode it in order to initialize the OCR functionality The only exception to this is the Localization by Code configuration that requires the User to configure one or more VisiSet OCR parameters and perform an upload of an image and perform a decoding over the image in order to properly initialize all the OCR features There are two command buttons specific to the OCR that are shown only when the reader has a valid OCR License and the OCR Feature is set to Enabled Upload OCR Ref Image this is shown only if a valid DLR file is present inside the M
6. and it is possible to load it inside DLReader Using DLReader the Font can be upgraded as needed then the usual application configuration steps take place 3 4 2 Disabling OCR Localization by Code VisiSet To remove the reader ROI objects Localization by Code 1 Open the parameter window 2 Set the OCR parameter Localization by Code to the value Disabled 3 Save parameters to Temporary memory and close the window 4 Trigger a read VisiSet button c Decode Last Image so that all data structures for OCR can get correctly initialized 5 Make sure that the value of the Configuration parameter returns to Absolute ROI 3 5 OCR LOCALIZED BY EDGE 3 5 1 One Edge Present 1 Create as many EDGE ROI objects as there are edges to be recognized 2 Create as many READER objects as there are LABELS to be read The Edge ROI object must be created before the Reader object s that it has to locate DLReader Create 1 EDGE ROI object and assign it a name for example edge_loc Create 1 READER object to read the LABEL It must be the smallest rectangle that contains the string The level of acceptance must be in the range 60 80 In the link field select the edge_loc option Run Font training Save the DLR file to the local file system ONDA Pw VisiSet After loading the DLR file configuration Font and reference image in Matrix reader the application is now ready and initialized 9 Make sure t
7. initialized 10 Make sure that the value of the Configuration parameter turns to Located by Edge 11 Save the parameters in permanent memory close the window 12 If the Matrix reader is reset the OCR configuration will persist if previously saved 13 In the case of a Matrix reader SW upgrade without explicitly Sending the Default Configuration parameters the OCR settings persist If the information has not been saved in permanent memory it is sufficient to re upload the reference image and run a sequence of operations on it as described above 11 O OCR USER S MANUAL 4 TROUBLESHOOTING 4 1 CHANGE IN IMAGE DIMENSIONS IMAGE CROP The DLR file created with DLReader internally stores the ROI position in absolute coordinates according to the image that has been used during the configuration phase If AFTER having setup the OCR application you need to crop the processed image using values resulting from the Calibration tab of the Parameter Setup you will have to re set the information for OCR ROI objects H Parameter Setup File Device Mode Fes a Send Defaults Permanent Interactive 2D Codes 1D Codes Postal Codes Image Processing Miscellaneous Data Collection Match Code Symbol Verification Communication Reading System Layout Ethernet CBX Gateway Display Diagnostics OCR Operating Modes i Digitall O LEDs And Keypad IMAGE ACOUISTTONSETTING J Self Tuning Disabled Internal
8. ESHOOTING n se eean eaa cre dali 12 Change in Image Dimensions IMAGE CROP ooccincoccconononinononcnononononononnncnnno non cnnnn cnn rro nn cnn rra nn 12 INDEX Goo oS a a a ci 13 REFERENCES REFERENCE DOCUMENTATION This manual is designed to give a general overview to using the OCR feature with Datalogic Matrix Family readers It covers application types general and specific setup procedures and configuration steps For further details refer to the supplementary documentation provided on Mini DVD e VisiSet M OCR Help On Line e OCR Software Configuration Parameters Guiide pdf version of Help e DLReader User s Manual e Matrix Host Mode Programming SERVICE AND SUPPORT Datalogic provides several services as well as technical support through its website Log on to www automation datalogic com and click on the links indicated for further information e PRODUCTS Search through the links to arrive at your product page which describes specific Info Features Applications Models Accessories and Downloads including the VisiSet utility program which allows device configuration using a PC It provides RS232 and Ethernet interface configuration e SERVICE Overview Warranty Extensions and Maintenance Agreements Sales Network Listing of Subsidiaries Repair Centers Partners Helpdesk Material Return Authorization CHOOSING A CONFIGURATION D 1 CHOOSING A CONFIGURATION 1 1 APPLICATION TYPES Application Type
9. Lighting Mode Very High Power Strobed Exposure Time x10us 35 650 Gain Increasing 1 Image Polarity Inversion Disabled TResen driest Top jo TResenorieesttat o This can easily be done as follows 1 Load the cropped image inside DLReader 2 load in DLReader the configuration previously created file DLR menu entry restore reader data 3 move the reader ROI object doing the OCR to the new location 4 save a new DLR file for the cropped image Follow the usual steps for the OCR configuration 12 INDEX Blob a group of dark pixels forming a connected path over a light background Crop obtaining a smaller image frame from a larger one Edge ROI object an object performing Edge detection on its assigned region of interest Inside a single image there can be one or more Edge ROI objects each one of them will locate an edge in the image if capable or successful Font s the set of data associated with the training of the OCR engine over a set of known strings The training process produces Font data which is used during recognition for the decision making process FOV Field Of Vision the area covered by the reader s visual span Localization Locator identification of the location of a code text glyph inside an acquired image frame Match String an expression giving priori knowledge about the type of output the OCR engine can expect from a reader ROI object e g only numerical digits
10. NEAR 545 35 x 22 545 25 4 21 45 752x480 65 mm 212 MEDIUM 380 50 x 32 380 25 4 14 96 752x480 105mm_ 213FAR 238 80 x 50 238 25 4 9 37 Note that the OCR string requires a quite zone of at least 10 pixels in all sides BROKEN XYUOPHONE 1 OCR FEATURE gt 2 OCR FEATURE The configuration of the OCR feature on the Matrix reader involves two software tools e DLReader for configuration of the inspection font training and saving of the OCR data files the entire OCR parameter set is available and therefore the complete potential of the library e VisiSet allows for normal configuration of the Matrix reader but also introduces the OCR menu this menu is where you can start the OCR configuration tool DLReader and then download the configuration file for the inspection to the Matrix reader thus activating the OCR function The OCR function inside Matrix products is subject to a licensing mechanism The OCR function is therefore disabled by default To show the OCR menu and the OCR command menu in VisiSet the application must be run with the command line switch ocr All the OCR parameters and commands are described in the OCR Help On Line and the relative Software Parameter Configuration Guide To achieve this a new shortcut can be created on the PC desktop to launch Visiset exe then it can be modified as shown in the image To create a new shortcut right click on the Visiset sho
11. OCRIFEATURE E EE E a 3 DlReader Tol A A tia 4 Installing DLReader nocie eainiie iia iee e idae iee die e A 4 Licensing the OCR Features cular 4 OCR Applications Configuration StepS oooconncccnnoccccnnnoccnonononcnnnono conan nc nn nono cnn nan NEEE nan nn r nan rra EAEE rre 5 OCR and Edge Symbologies sissies iias nac a eii 6 OCR Reference Mage ica A ns 6 CONFIGURING AN OCR APPLICATION cococonccocccconnccccccinnnccnncrnrrnrrrnr nna 7 General OCR Configuration Steps 0 cccccceececeeececeee cece ee eeceeaeee cece ee seaaaeaeeeeeeeseceaaaeeeeeeeseseneaeeeeeeeeeeeeaees 7 Creating an OCR ConfiguratiON oooccccononccononocnnononcncnanoncnn nono nono non cnn nano nn rr nana rre 7 Deleting an OCR Configuration e r aces ceee eee r r cess ra Ea E A Er a aara EE aaa E EEEa 7 Check amp Modify the OCR Configuration ooooooccconococcnnnoccnonononanonononcnnno conc nono cnn nan n cnn naar ren nnn rra nn rre rca 8 OCR With an Absolute RO l ae aer n ra aer aa corno a e nn crnrrrnrnrrrrrrrnrrnrnrnrnr 8 OCR Localized by a Character LOgo ssi sisie epin aeta Ea eee e Ea a a i ea ea di pendanaan 8 OCR Localized by a 1D 2D Codes siisii iiie iei addii iiie da iaee e aiaeei 9 FontUpdateS iio 9 Disabling OCR Localization by Code iiaii eiei iaei aa eade ieia ea ia Eda ie aiiai 10 OGR Localized Dy mo 0 EE E E A E E E E A ES 10 One Edge Present isc evi eile ate ee a dha ey E A TE ede 10 Two Edges Presentacion ri a a edveess oi ened eins 11 TROUBL
12. ase of a Matrix reader SW upgrade without explicitly Sending the Default Configuration parameters the OCR settings persist If the information has not been saved in permanent memory and a restart occurs it is sufficient to upload the OCR Reference Image and run a first reading on it to properly initialize all the data structures related to the OCR and localization functions 3 4 OCR LOCALIZED BY A 1D 2D CODE DLReader 1 Create as many reader ROI objects as there are strings to be read 2 Run Font training 3 Save the file DLR to the file system VisiSet After loading the DLR file configuration Font and reference image on the Matrix reader the application is ready but still in Absolute ROI To configure the code location some other action should be performed 4 Open the parameters window using the Device gt Get configuration from Temporary Memory command from the main menu Do not enter the Calibration Tool wizard 5 Check the 1D 2D Postal Codes tabs and make sure that ONLY the code type present on the reference image is enabled in VisiSet configuration 6 Set the OCR parameter Localization by Code to the value Enabled 7 Save the parameters in Temporary memory and close the dialog 8 Upload the reference image using the new button z Upload OCR Ref Image it will retrieve image information from the Matrix FLASH memory where it has been stored with the DLR file information 9 Run an initial readin
13. atrix s FLASH Rotate Last Image Z Upload OCR Ref Image lt Rotate Last Image Instead of using the Upload the Bitmap Image button the user can use the new button Z Upload OCR Reference Image to automatically load the reference image into the reader s system memory Once this has been done OCR identification can be run The Rotate Last Image button is meaningful only when a code is present it uses decoded code rotation info in order to rotate the image to obtain a code orientation of 0 degrees This can be very useful in two cases To create a reference image where code rotation O degrees This guarantees the success of the Localization by Code Action To train the OCR functionality on characters which were not recognized during the Training Phase because they were rotated CONFIGURING AN OCR APPLICATION D 3 CONFIGURING AN OCR APPLICATION 3 1 GENERAL OCR CONFIGURATION STEPS 3 1 1 Creating an OCR Configuration An OCR application with a Matrix reader can be configured using the following procedure VisiSet 1 Capture an image and save it to a PC test bmp 2 Launch DLReader the OCR Configuration GUI DLReader 3 OCR Configuration a Load the previously saved image test bmp Open command b Configure one or more reader ROIs boxing the strings to be read c Tune the OCR engine configuration if necessary d Train for the Fonts e Save the results to file test dlr containi
14. bration Matrix 410 1280x1024 Check also the image dimension Parameter SetUp gt Calibration Matrix 410 600 1600x1200 Check also the image dimension Parameter SetUp gt Calibration It also must be checked the compatibility of the DLR file with the set up of the Matrix reader where it is loaded Indeed a file created for a DLR Matrix 210 FAR model 213 may have a ROI which turns out to be too small for a Matrix 2107 MEDIUM Model 212 2 1 1 Installing DLReader DLReader comes inside a ZIP archive file that also contains some library files necessary to make it work The full content of the zip archive must be extracted to the VisiSet installation directory path typically C Program Files Datalogic VisiSet2 If the extraction PATH is not C Program Files Datalogic VisiSet2 DLREADER fails to launch from VisiSet Expert Windows Users can open the registry key HKCU Software Datalogic Visiset and look at the value of the FullPath key There is where the content of the DLReader package has to be extracted in order to make it work seamless with VisiSet AN Editing the windows registry could damage your Windows installation please proceed with editing the registry only if you know what you are doing CAUTION 2 2 LICENSING THE OCR FEATURE As mentioned before the OCR feature of the Matrix product is a licensed feature disabled by default this means that before the user is be able to use it a val
15. der First make sure you have some good quality samples for your OCR application make sure you place them under the Matrix reader and you set up the Matrix using VisiSet Calibration Setup Wizard to make it acquire images whose brightness and contrast match your application s true operating conditions Once you are satisfied with the result of the acquisition save this image or the images set needed for the application to the local file system and keep it them for future reference we will be referring to this image as The Reference Image s Of course it is possible to change the reference image for the application at any time but that will to go through the sequence of operations being described in this section 2 Configure the OCR engine using DLReader When you are satisfied with the quality of the acquired image you can run DLReader application via the Ocr gt Run DLReader menu entry in VisiSet The configuration procedure begins with the opening of The Reference Image and continues further with the setup of the OCR engine parameters This process is described in its entirety in the DLReader User s Manual and completes with the output from DLReader of a DLR configuration file 3 Upload the configuration to the Matrix reader Now let us go back to the VisiSet configuration application the produced DLR configuration file is uploaded to the Matrix reader via the Ocr gt Upload Configuration File menu entry Th
16. g VisiSet button c Decode Last Image to initialize any data structures related to the OCR 10 In VisiSet reopen the configuration using the Device gt Get configuration from Temporary Memory command from the main menu and verify that the value for the OCR Type Configuration parameter has changed to Localized by Code 11 At this point any position differences in samples will be accepted within the limits of the application as it has been configured 12 Save parameters in permanent memory and close the window 13 If the Matrix reader is reset the OCR configuration will persist if previously saved 14 In the case of a Matrix reader SW upgrade without explicitly Sending the Default Configuration parameters the OCR settings persist If the information has not been saved to permanent memory it is sufficient to upload again the reference image run the sequence of operations over it as described above 3 4 1 Font Updates The OCR training phase can require the addition to the Font of characters not yet recognized The DLReader tool accepts only horizontal or vertical strings so if the unrecognized chars belong to a case where the string is rotated an unrotate action must be performed before loading the image in the DLReader tool ED OCR USER S MANUAL In this case it is possible to unrotate the Image using the Rotate Last Image command it produces a new image where the string is orientated like the reference image
17. hat the value of the Configuration parameter turns to Located by Edge 10 Save the parameters in permanent memory close the window 11 If the Matrix reader is reset the OCR configuration will persist if it has been previously saved 12 In the case of a Matrix reader SW upgrade without explicitly Sending the Default Configuration parameters the OCR settings persist If the information has not been saved in permanent memory it is sufficient to re upload the reference image and run a sequence of operations on it as described above 10 CONFIGURING AN OCR APPLICATION lt 3 5 2 Two Edges Present 1 Create as many EDGE ROI objects as there are edges to be recognized 2 Create as many READER ROI objects as there are LABELS to be read The Edge ROls should always be created before the Reader ROI objects they have to locate DLReader 3 Create 1 EDGE ROI object and name it for example edge_loc1 4 Create 1 EDGE ROI object and assign it a name for example edge_loc2 In the link field select edge_loc1 5 Create 1 READER ROI object to read the LABEL It must be the smallest rectangle that contains the string 6 The level of acceptance must be in the range 60 80 7 Inthe link field select edge_loc2 8 Run Font training 9 Save the DLR file in a system file VisiSet After loading the DLR file configuration Font and reference image in Matrix reader the application is now ready and
18. id OCR unlocking license key has to be supplied to the reader The licensing mechanism is performed in two steps and requires VisiSet and the reader to be running 1 firsta Reader Registration Code has to be produced from the Matrix and saved to the local PC as a text file This can be done using VisiSet under the OCR Download Reader Registration Code menu 2 The saved file has to be shipped to a Datalogic subsidiary where it will be modified and returned to the user as a text file containing the Unlocking License Key NOTE Datalogic may require the payment of a licensing fee or the enrolment into a OCR licensing program please contact your local sales representative for additional information 3 Upon receiving the unlocking license key file it has to be uploaded to the Matrix reader via the OCR Upload License Key menu 4 On successful feature unlocking the reader will reset and the feature made available OCR FEATURE gt 2 3 OCR APPLICATIONS CONFIGURATION STEPS In order to design and run your first OCR application with a Matrix reader you will want to follow a sequence of steps involving the OCR engine configuration application DLReader the Matrix reader configuration application VisiSet and some playing with sample images Following is a list of activities to guide the user in the process of designing and running an OCR application 1 Start off with some samples and with the Matrix rea
19. is file is saved into a dedicated flash area of the Matrix reader and the upload and storage process follows a similar sequence as with matrix binary files similar sequence of messages are shown inside VisiSet s terminal screen and completes with the message Configuration Saved in Permanent Memory 4 Configure Matrix to work with the OCR symbology Once the configuration for the OCR has been successfully uploaded stored on the Matrix reader the configuration of OCR related parameters via VisiSet begin first by enabling the OCR functionality OCR tab OCR OCV Status gt enabled 5 Run the OCR application When all the steps above have been executed the Matrix reader is ready to run the OCR OCV application in the usual way triggering output etc If you wish to refine the settings you can either make some modifications to the Matrix configuration under the OCR tab OCR OCV section or if you need to start off a new Reference Image you will have to repeat the sequence of steps starting with 0 making sure that in 2 you load the NEW Reference Image and you modify the existing configuration by first loading it into DLReader Ocr gt Restore Reader Data A NB it might be necessary to acquire more than one sample image to exploit the complete Font used along the application In general with OCR it is true the assumption the more sample images the more training the better the result outcome E OCR USER
20. ng both the configuration and the trained Font VisiSet 4 Open the Parameter Setup dialog using the Get Configuration From Temporary Memory command of the Device Menu and enable the OCR function Status parameter of the OCR tab 5 Upload the configuration file and Font test dlr to the Matrix reader using the Upload the configuration file command of the OCR menu The loaded DLR file also contains the OCR Reference Image 6 When needed open the Parameter Setup dialog and modify the OCR configuration for example to enable the Localization by Code 7 Run an initial decoding to initialize the OCR parameters if required 8 Save the configuration to permanent memory using the Send button of the Parameter Setup dialog if you want the configuration to persist upon resets of the Matrix reader In cases where font training is needed over multiple images you will want to repeat steps 1 through 3 Tip Save all the images where the font has been trained under a different directory for each application together with the respective DLR generated file and the VisiSet configuration after the first capture 3 1 2 Deleting an OCR Configuration An OCR application can be deleted from a Matrix reader using the following procedure VisiSet 1 Delete the configuration and Font file test dlr on Matrix reader To delete the OCR configuration select Erase Configuration File from the VisiSet OCR menu 2 Open the Parameter Setu
21. p dialog and disable the OCR function Status parameter 3 Save the configuration to permanent memory EDP OCR USER S MANUAL 3 1 3 Check amp Modify the OCR Configuration The Quality Level the OCR Match String and the ROI position already configured by DLReader are also modifiable using the VisiSet Parameter Setup dialog They are visible enabling the OCR Advanced View parameter Note that the Quality Level initially reflects the value of the Image Fail parameter set in the DLReader configuration The enabling of the Show All OCR ROIs parameter causes the ROI to be drawn on the captured image so you will also be able to see them This parameter is very useful for troubleshooting especially to verify the ROI position in case of rotated ROIs OCR located by 1D 2D barcode Any changes to the VisiSet Parameter doesn t affect the dlr file 3 2 OCR WITH AN ABSOLUTE ROI DLReader 1 Create as many reader ROI objects as there are LABELS to be read 2 No level of acceptance should be set 0 3 Run Font training 4 Save the DLR file to the file system VisiSet After loading the DLR file on the Matrix reader configuration Font and reference image the OCR application is ready and initialized 5 Verify that the value for the OCR Type Configuration parameter becomes Absolute ROI If the Matrix is reset the OCR configuration will persist if previously saved to permanent memory 7 In the case of a Matrix reade
22. r SW upgrade without explicitly Sending the Default Configuration parameters the OCR settings persist 3 3 OCR LOCALIZED BY A CHARACTER LOGO DLReader 1 Create a Reader ROI object to locate the Character Logo assign a name to the created reader object for example blob_loc Set its level of acceptance to 0 NOTE for the localization ONLY the leftmost character in the defined reader ROI is considered 2 Create as many reader ROIs as there are LABELS to be read Their level of acceptance shouldn t be 0 In the link field select the value blob_loc for everyone of them Run Font training on every added reader After this any change in the position of the first Character Logo on the left side the reader ROI of blob_loc will result in a change in the position of the reader ROIs used for the recognition of the other strings 3 Save the DLR file to the file system CONFIGURING AN OCR APPLICATION D VisiSet After loading the DLR file configuration trained Font and reference image in Matrix reader the application is now ready and initialized 4 Verify that the value for the Configuration parameter becomes Located by Blob At this point any position differences in samples will be accepted within the limits of the application as it has been configured 5 Save to permanent memory 6 If the Matrix reader is reset the OCR configuration will persist if previously saved 7 In the c
23. rtcut icon in the Windows Start Menu then select Create Shortcut A new shortcut will be created in the same location as the current Visiset shortcut icon To customize the new shortcut as in the image right click the newly created icon and select Properties VisiSet OCR Properties a General Shortcut Compatibility Security a Visisef OCR Target type Application Target location VisiSet2 Target rogram Files Datalogic isiSet2 VisiSet exe ocr In the VisiSet application the OCR OCV function is treated as a symbology and can be used during reader configuration just like other symbologies for example as an option in Data Collection gt Code Filter Settings E OCR USER S MANUAL 2 1 DLREADER TOOL DLReader can be run from VisiSet menu toolbar under OCR gt Run DLReader The only way to configure an OCR application is by using this tool and follow the instructions contained in the DLReader manual 1 DLReader can load any bitmap image format resolution but the resulting DLR file relates to a specific format The same DLR file can also be loaded on multiple readers that support the same image format resolution eg two Matrix 210 s whereas it is NOT possible to use the same DLR file on readers that have different image formats such as a Matrix 210 and a Matrix 410 Type Img Dim Notes Matrix 210 752x480 Check also the image dimension Parameter SetUp gt Cali
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