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| <div class="floatcenter">[[File:ITK_Examples_Baseline_ImageProcessing_TestRGBToLuminanceImageFilter.png]]</div>
| | {{warning|1=The media wiki content on this page is no longer maintained.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. |
| ==RGBToLuminanceImageFilter.cxx==
| | }} |
| <source lang="cpp">
| |
| #include "itkImage.h"
| |
| #include "itkImageFileReader.h"
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| #include "itkRGBToLuminanceImageFilter.h"
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|
| |
|
| #include "QuickView.h"
| | [https://itk.org/ITKExamples[ITK Sphinx Examples]] |
| | |
| typedef itk::Image<itk::RGBPixel<unsigned char>, 2> RGBImageType;
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| typedef itk::Image<unsigned char, 2> ScalarImageType;
| |
| | |
| static void CreateImage(RGBImageType* const image);
| |
| | |
| int main(int argc, char *argv[])
| |
| {
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| RGBImageType::Pointer image;
| |
| | |
| std::string imageName;
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| if(argc < 2)
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| {
| |
| //std::cerr << "Required: filename" << std::endl;
| |
| //return EXIT_FAILURE;
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| image = RGBImageType::New();
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| CreateImage(image);
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| imageName = "Generated image";
| |
| }
| |
| else
| |
| {
| |
| typedef itk::ImageFileReader<RGBImageType> ReaderType;
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| ReaderType::Pointer reader = ReaderType::New();
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| reader->SetFileName(argv[1]);
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| reader->Update();
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| image = reader->GetOutput();
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| imageName = argv[1];
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| }
| |
| | |
| typedef itk::RGBToLuminanceImageFilter<RGBImageType, ScalarImageType> LuminanceFilterType;
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| LuminanceFilterType::Pointer luminanceFilter = LuminanceFilterType::New();
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| luminanceFilter->SetInput(image);
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| luminanceFilter->Update();
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| | |
| QuickView viewer;
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| viewer.AddImage(
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| image.GetPointer(),
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| true,
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| imageName);
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| viewer.AddImage(
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| luminanceFilter->GetOutput(),
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| true,
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| "Luminance");
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| viewer.Visualize();
| |
| | |
| return EXIT_SUCCESS;
| |
| }
| |
| | |
| | |
| void CreateImage(RGBImageType* const image)
| |
| {
| |
| // Create an image with 2 connected components
| |
| itk::Index<2> corner = {{0,0}};
| |
| | |
| itk::Size<2> size;
| |
| unsigned int NumRows = 200;
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| unsigned int NumCols = 300;
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| size[0] = NumRows;
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| size[1] = NumCols;
| |
| | |
| itk::ImageRegion<2> region(corner, size);
| |
| | |
| image->SetRegions(region);
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| image->Allocate();
| |
| | |
| RGBImageType::PixelType pixel;
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| pixel.SetRed(200);
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| pixel.SetGreen(50);
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| pixel.SetBlue(50);
| |
| // Make a square
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| for(unsigned int r = 40; r < 100; r++)
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| {
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| for(unsigned int c = 40; c < 100; c++)
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| {
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| itk::Index<2> pixelIndex;
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| pixelIndex[0] = r;
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| pixelIndex[1] = c;
| |
| | |
| image->SetPixel(pixelIndex, pixel);
| |
| }
| |
| }
| |
| }
| |
| </source>
| |
| | |
| {{ITKCMakeLists|BinaryThinningImageFilter}}
| |
