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| This example demonstrates how to access a specified channel of a vector image as if it were a scalar image.
| | {{warning|1=The media wiki content on this page is no longer maintained.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. |
| | | }} |
| ==VectorIndexSelectionCastImageFilter.cxx==
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| <source lang="cpp">
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| #include "itkVectorImage.h"
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| #include "itkImageRegionIterator.h"
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| #include "itkMinimumMaximumImageCalculator.h"
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| #include "itkVectorIndexSelectionCastImageFilter.h"
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| | |
| typedef itk::VectorImage<float, 2> VectorImageType;
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| typedef itk::Image<float, 2> ScalarImageType;
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| void CreateImage(VectorImageType::Pointer image);
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| int main(int, char *[])
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| {
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| VectorImageType::Pointer image = VectorImageType::New();
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| CreateImage(image);
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| typedef itk::VectorIndexSelectionCastImageFilter<VectorImageType, ScalarImageType> IndexSelectionType;
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| IndexSelectionType::Pointer indexSelectionFilter = IndexSelectionType::New();
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| indexSelectionFilter->SetIndex(0);
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| indexSelectionFilter->SetInput(image);
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| typedef itk::MinimumMaximumImageCalculator <ScalarImageType> ImageCalculatorFilterType;
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| ImageCalculatorFilterType::Pointer imageCalculatorFilter = ImageCalculatorFilterType::New();
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| imageCalculatorFilter->SetImage(indexSelectionFilter->GetOutput());
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| imageCalculatorFilter->Compute();
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| return EXIT_SUCCESS;
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| }
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| void CreateImage(VectorImageType::Pointer image)
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| {
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| VectorImageType::IndexType start;
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| start.Fill(0);
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| VectorImageType::SizeType size;
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| size.Fill(2);
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| VectorImageType::RegionType region(start, size); | |
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| image->SetRegions(region);
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| image->SetNumberOfComponentsPerPixel(3);
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| image->Allocate();
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| typedef itk::VariableLengthVector<double> VariableVectorType;
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| VariableVectorType variableLengthVector;
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| variableLengthVector.SetSize(3);
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| variableLengthVector[0] = 1.1;
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| variableLengthVector[1] = 2.2;
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| variableLengthVector[2] = 3.3;
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| image->FillBuffer(variableLengthVector);
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| }
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| </source>
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| {{ITKCMakeLists|VectorIndexSelectionCastImageFilter}}
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