Working With Raster Graphic Images In Origin Importing And Plotting
Contents
1. you are shifting the range of Z values that are mapped to the palette Adjusting the Brightness and Contrast of the Image Zl i3 mir fis ZZE 286 Zma 256 To plot the image into a graph window select Plot Image Plot The default X and Y axis range is determined by the coordinate range of the matrix which is the same as the image s X and Y pixel range Importing and Plotting Images e 145 Chapter 6 continued Working with Raster Graphic Images in Origin Plotting the Image into a Graph Graphi Adding New Color Palettes to Origin You can add new image palettes that are in Microsoft binary format or JASC ASCII format and that are 256 color To do this copy the file to the Origin Palettes subfolder The next time you start Origin these new palettes will display in the Image Palette submenu You can create new palettes using any external application that writes the palette out in the Microsoft PAL format This is the only format that 1s recognized by Origin Additionally Origin provides a palette editor project file located in the Origin subfolder SAMPLES PROGRAMMING PALETTE EDITOR PALEDIT OPJ Entering Image Data Directly into a Matrix In addition to importing images you can enter image data directly into a matrix In this case the values you enter are considered to be 8 bit or higher gray scale intensity values Before entering values in a matrix select Matrix Set Properties to correctly set the interna2. Chapter 6 continued Working with Raster Graphic Images in Origin Working with Raster Graphic Images in Origin Importing and Plotting Images Origin provides enhanced support for importing viewing and plotting raster graphic images To import a gray scale 8 bit color or higher resolution color image into the active matrix select File mport Image Alternatively drag the desired file from Windows Explorer and drop it into the matrix When you first import the image Origin displays a device independent bitmap DIB of the image in the matrix If you are only interested in a region of the image you can select a region of the DIB using the Rectangle sie Tool in region of interest mode on the Tools toolbar The region of interest mode is controlled from the Tools Region of Interest Tools menu command Selecting a Region of Interest fae Matrixi C Program Files OriginLab4Or Miel Ea Copy Create New You can also view the image data instead of the image To do this select View Data Mode Once you view the data in the matrix you cannot return to the original DIB view To convert the DIB to data Origin converts each pixel to an RGB value and then assigns the corresponding matrix cell an index number to a gray scale palette based on the RGB value of the pixel To convert back to image view select View Image View The matrix now displays the image by mapping each each cell s index value to a gray scale palette Yo
3. l data type If you view the image instead of the data you entered View Show Image Origin displays the image by converting each intensity value to an index number from a gray scale palette The gray scale palette is created based on the internal data type resolution of the matrix As with imported images you can change the palette by selecting Image Palette PaletteSelection Adding New Color Palettes to Origin e 146 Chapter 6 continued Working with Raster Graphic Images in Origin Image Processing Example Origin provides a basic image processing example that allows you to choose a filter and then apply the filter to the image The example uses Origin C code to perform the filter operations To review this example open IMAGE PROCESSING OPJ located in the Origin SAMPLES PROGRAMMING IMAGE PROCESSING subfolder Plotting an Image Histogram After importing a raster graphic image into a matrix Origin can create a histogram of the intensity values in the image To plot a histogram from the image in the matrix select Plot Histogram Example Image Histogram E Graphi Of x 40000 B 170000 1000 s0000 i d o p 40000 zoo0o ZO 75 30 35 40 45 SO 55 GO 85 FO 75 KM Axis Title Viewing the Images X and Y Projections Matrix images can also be plotted using a graph template that includes X and Y projections To plot to this template select Plot Profiles You can drag the lines to vie
4. u can also view the image using a built in or user supplied color palette Viewing the image using a specified color palette may clarify regions of the image To view the image using a color palette you must first convert the DIB to matrix data To do this select Image Convert to Gray Data You can also switch to View Data Mode and then back to View Image Mode Origin converts each pixel to an RGB value and then assigns the corresponding matrix cell an index number to a gray scale palette based on the RGB value of the pixel To display the image using a palette other than gray scale select Importing and Plotting Images e 144 Chapter 6 continued Working with Raster Graphic Images in Origin Image Palette PaletteSelection A number of built in palettes are provided For information on including your own palettes see Adding New Color Palettes to Origin on page 146 Viewing the Image Using a Built in Palette for Improved Clarity fag Matrixi C Program Files OriginLab Or Biel Ea When viewing the image from a palette Origin maps each cell s index value to a color in the selected palette Thus the image s full matrix Z value range is mapped to the palette You can adjust the brightness and the contrast of the image using the Tuning tool To open this tool select Image Tuning When you adjust the Contrast slider you are increasing or decreasing the Z value range that is mapped to the palette When you adjust the Brightness slider
5. w different X and Y projections You can also view the projections using an arbitrary line Image Processing Example e 147 Chapter 6 continued Working with Raster Graphic Images in Origin Viewing the Images X and Y Projections E Profiles1 Curror Tepa lt gt Cromed Lines gt Srolirar Line iki Fo A SS ch ch aS iS iS Si To export an image in the matrix to a raster graphic image file the internal data type of the matrix must be set to either short int or char The internal data type is set in the Matrix Properties dialog box To open this dialog box select Matrix Set Properties Exporting an Image To export an image to a file select File Export Image when the matrix is active Exporting an Image e 148
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