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| ==ConvertPixelBuffer.cxx== | | {{warning|1=The media wiki content on this page is no longer maintained.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. |
| <source lang="cpp">
| | }} |
| #include "itkRGBPixel.h"
| |
| #include "itkRGBAPixel.h"
| |
| #include "itkImage.h"
| |
| #include "itkDefaultConvertPixelTraits.h"
| |
| #include "itkConvertPixelBuffer.h"
| |
| #include "itkImageRandomConstIteratorWithIndex.h"
| |
| | |
| int main(int argc, char* argv[])
| |
| {
| |
| const int xDimension = 200;
| |
| const int yDimension = 100;
| |
| | |
| typedef unsigned char ComponentType;
| |
| typedef itk::RGBPixel<ComponentType> RGBPixelType;
| |
| typedef itk::RGBAPixel<ComponentType> RGBAPixelType;
| |
| typedef itk::Image< RGBPixelType, 2 > RGBImageType;
| |
| typedef itk::Image< RGBAPixelType, 2 > RGBAImageType;
| |
| typedef itk::DefaultConvertPixelTraits< RGBPixelType >
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| TraitsType;
| |
| typedef itk::ConvertPixelBuffer< ComponentType, RGBPixelType, TraitsType >
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| RGBAConverterType;
| |
| | |
| RGBImageType::Pointer rgbImg = RGBImageType::New();
| |
| RGBAImageType::Pointer rgbaImg = RGBAImageType::New();
| |
| | |
| // Create the two images
| |
| // RGBAImage
| |
| RGBAImageType::IndexType rgbaStart;
| |
| rgbaStart[0] = 0;
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| rgbaStart[1] = 0;
| |
| | |
| RGBAImageType::SizeType rgbaSize;
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| rgbaSize[0] = xDimension;
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| rgbaSize[1] = yDimension;
| |
| | |
| itk::ImageRegion<2> rgbaRegion(rgbaStart,rgbaSize);
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| rgbaImg->SetRegions(rgbaRegion);
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| rgbaImg->Allocate();
| |
| | |
| RGBAPixelType rgbaDefault;
| |
| rgbaDefault[0] = 127;
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| rgbaDefault[1] = 100;
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| rgbaDefault[2] = 230;
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| rgbaDefault[3] = 255;
| |
| rgbaImg->FillBuffer(rgbaDefault);
| |
| | |
| // RGBImage
| |
| RGBImageType::IndexType rgbStart = rgbaStart;
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| RGBImageType::SizeType rgbSize = rgbaSize;
| |
| itk::ImageRegion<2> rgbRegion = rgbaRegion;
| |
| rgbImg->SetRegions(rgbRegion);
| |
| rgbImg->Allocate();
| |
| | |
| size_t numberOfPixels =
| |
| rgbImg->GetLargestPossibleRegion().GetNumberOfPixels();
| |
| | |
| // Convert a raw buffer to a buffer of pixel types
| |
| RGBAConverterType::Convert(
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| static_cast<ComponentType *>(rgbaImg->GetPixelContainer()->GetBufferPointer()->GetDataPointer()),
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| rgbaImg->GetNumberOfComponentsPerPixel(),
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| (rgbImg->GetPixelContainer()->GetBufferPointer()),
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| numberOfPixels);
| |
| | |
| // Check a few random values
| |
| itk::ImageRandomConstIteratorWithIndex<RGBImageType>
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| rgbIterator(rgbImg, rgbImg->GetLargestPossibleRegion());
| |
| rgbIterator.SetNumberOfSamples(numberOfPixels / 10);
| |
| rgbIterator.GoToBegin();
| |
| | |
| while(!rgbIterator.IsAtEnd())
| |
| {
| |
| if (rgbImg->GetPixel(rgbIterator.GetIndex())[0] !=
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| rgbaImg->GetPixel(rgbIterator.GetIndex())[0] ||
| |
| | |
| rgbImg->GetPixel(rgbIterator.GetIndex())[1] !=
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| rgbaImg->GetPixel(rgbIterator.GetIndex())[1] ||
| |
| | |
| rgbImg->GetPixel(rgbIterator.GetIndex())[2] !=
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| rgbaImg->GetPixel(rgbIterator.GetIndex())[2])
| |
| {
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| std::cout << "Copy failed for index " << rgbIterator.GetIndex()
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| << " got " << rgbImg->GetPixel(rgbIterator.GetIndex())
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| << " but expected " << rgbaImg->GetPixel(rgbIterator.GetIndex())
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| << std::endl;
| |
| }
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| ++rgbIterator;
| |
| }
| |
| return EXIT_SUCCESS;
| |
| }
| |
| </source>
| |
| | |
| {{ITKCMakeLists|{{SUBPAGENAME}}}}
| |
