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| Checkerboards are a convenient way to compare two images. This example displays a black and white checkerboard. Optionally you can provide one or two rgb triples (scaled 0-255). Then this example is convenient for comparing paint colors. For a site that converts vendor paint names to rub, see: [http://www.color-swatches.com].
| | {{warning|1=The media wiki content on this page is no longer maintained. The examples presented on the https://itk.org/Wiki/* pages likely require ITK version 4.13 or earlier releases. In many cases, the examples on this page no longer conform to the best practices for modern ITK versions. |
| | }} |
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| <div class="floatcenter">[[File:ITK_Examples_Baseline_Inspection_TestCheckerBoardImageFilter.png]]</div>
| | [https://itk.org/ITKExamples[ITK Sphinx Examples]] |
| ==CheckerBoardImageFilter.cxx==
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| <source lang="cpp">
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| #include "itkImage.h"
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| #include "itkRGBPixel.h"
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| #include "itkCheckerBoardImageFilter.h"
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| #include "itkImageRegionIterator.h"
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| #include "QuickView.h"
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| typedef itk::RGBPixel<unsigned char> PixelType;
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| typedef itk::Image<PixelType, 2> ImageType;
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| static void CreateImage(ImageType::Pointer image, PixelType);
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| int main(int argc, char *argv[])
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| {
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| ImageType::Pointer image1 = ImageType::New();
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| PixelType pixel1;
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| pixel1.Fill(0);
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| if (argc > 3)
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| {
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| pixel1.SetRed(atoi(argv[1]));
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| pixel1.SetGreen(atoi(argv[2]));
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| pixel1.SetBlue(atoi(argv[3]));
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| }
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| CreateImage(image1, pixel1);
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| ImageType::Pointer image2 = ImageType::New();
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| PixelType pixel2;
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| pixel2.Fill(255);
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| if (argc > 6)
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| {
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| pixel2.SetRed(atoi(argv[4]));
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| pixel2.SetGreen(atoi(argv[5]));
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| pixel2.SetBlue(atoi(argv[6]));
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| }
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| CreateImage(image2, pixel2);
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|
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| typedef itk::CheckerBoardImageFilter< ImageType > CheckerBoardFilterType;
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| CheckerBoardFilterType::Pointer checkerBoardFilter = CheckerBoardFilterType::New();
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| checkerBoardFilter->SetInput1(image1);
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| checkerBoardFilter->SetInput2(image2);
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| checkerBoardFilter->Update();
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|
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| QuickView viewer;
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| viewer.AddImage<ImageType>(image1);
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| viewer.AddImage<ImageType>(image2);
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| viewer.AddImage<ImageType>(checkerBoardFilter->GetOutput());
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| viewer.Visualize();
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|
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| return EXIT_SUCCESS;
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| }
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| void CreateImage(ImageType::Pointer image, PixelType color)
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| {
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| // Create an image with all pixels set to 'color'
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|
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| ImageType::IndexType start;
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| start.Fill(0);
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|
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| ImageType::SizeType size;
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| size.Fill(100);
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| ImageType::RegionType region;
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| region.SetSize(size);
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| region.SetIndex(start);
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| image->SetRegions(region);
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| image->Allocate();
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|
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| itk::ImageRegionIterator<ImageType> imageIterator(image,region);
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| while(!imageIterator.IsAtEnd())
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| {
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| imageIterator.Set(color);
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| ++imageIterator;
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| }
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| }
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| </source>
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| {{ITKVTKCMakeLists|CheckBoardImageFilter|}}
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