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| ==GradientMagnitudeImageFilter.cxx== | | {{warning|1=The media wiki content on this page is no longer maintained.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 <string>
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|
| |
|
| #include "itkImage.h"
| | [https://itk.org/ITKExamples[ITK Sphinx Examples]] |
| #include "itkImageFileReader.h"
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| #include "itkImageFileWriter.h"
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| #include "itkRescaleIntensityImageFilter.h"
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| #include "itkGradientMagnitudeImageFilter.h"
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| | |
| int main(int argc, char * argv[])
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| {
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| // Verify command line arguments
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| if( argc < 3 )
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| {
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| std::cerr << "Usage: " << std::endl;
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| std::cerr << argv[0] << " inputImageFile outputImageFile " << std::endl;
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| return EXIT_FAILURE;
| |
| }
| |
| | |
| // Parse command line arguments
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| std::string inputFilename = argv[1];
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| std::string outputFilename = argv[2];
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| | |
| // Setup types
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| typedef float inputPixelType;
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| typedef float outputPixelType;
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| | |
| typedef itk::Image< inputPixelType, 2 > inputImageType;
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| typedef itk::Image< outputPixelType, 2 > outputImageType;
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| | |
| typedef itk::ImageFileReader< inputImageType > readerType;
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| | |
| typedef itk::GradientMagnitudeImageFilter<
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| inputImageType, outputImageType > filterType;
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| | |
| // Create and setup a reader
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| readerType::Pointer reader = readerType::New();
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| reader->SetFileName( inputFilename.c_str() );
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| | |
| // Create and setup a gradient filter
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| filterType::Pointer gradientFilter = filterType::New();
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| gradientFilter->SetInput( reader->GetOutput() );
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| gradientFilter->Update();
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| | |
| // To write the gradient image file, we must rescale the gradient values
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| // to a reasonable range
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| typedef unsigned char writePixelType;
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| typedef itk::Image< writePixelType, 2 > writeImageType;
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| typedef itk::RescaleIntensityImageFilter<
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| outputImageType, writeImageType > rescaleFilterType;
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| | |
| rescaleFilterType::Pointer rescaler = rescaleFilterType::New();
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| rescaler->SetOutputMinimum( 0 );
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| rescaler->SetOutputMaximum( 255 );
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| rescaler->SetInput( gradientFilter->GetOutput() );
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| | |
| // Create and setup a writer
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| typedef itk::ImageFileWriter< writeImageType > writerType;
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| writerType::Pointer writer = writerType::New();
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| writer->SetFileName( outputFilename.c_str() );
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| writer->SetInput( rescaler->GetOutput() );
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| writer->Update();
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| | |
| return 0;
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| }
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| </source>
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| | |
| ==CMakeLists.txt==
| |
| <source lang="cmake">
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| cmake_minimum_required(VERSION 2.6)
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| | |
| PROJECT(GradientMagnitudeImageFilter)
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| | |
| FIND_PACKAGE(ITK REQUIRED)
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| INCLUDE(${ITK_USE_FILE})
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| | |
| ADD_EXECUTABLE(GradientMagnitudeImageFilter GradientMagnitudeImageFilter.cxx)
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| TARGET_LINK_LIBRARIES(Gradient ITKNumerics ITKIO ITKAlgorithms)
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| | |
| </source>
| |
