ITK  4.13.0
Insight Segmentation and Registration Toolkit
WikiExamples/EdgesAndGradients/DerivativeImageFilter.cxx
#include "itkImage.h"
#include "QuickView.h"
int main(int argc, char * argv[])
{
// Verify command line arguments
if( argc < 2 )
{
std::cerr << "Usage: " << std::endl;
std::cerr << argv[0] << " inputImageFile" << std::endl;
return EXIT_FAILURE;
}
// Parse command line arguments
std::string inputFilename = argv[1];
// Setup types
typedef itk::Image< float, 2 > FloatImageType;
typedef itk::Image< unsigned char, 2 > UnsignedCharImageType;
UnsignedCharImageType, FloatImageType > filterType;
// Create and setup a reader
readerType::Pointer reader = readerType::New();
reader->SetFileName( inputFilename.c_str() );
// Create and setup a derivative filter
filterType::Pointer derivativeFilter = filterType::New();
derivativeFilter->SetInput( reader->GetOutput() );
derivativeFilter->SetDirection(0); // "x" axis
QuickView viewer;
viewer.AddImage<UnsignedCharImageType>(reader->GetOutput());
viewer.AddImage<FloatImageType>(derivativeFilter->GetOutput());
viewer.Visualize();
return EXIT_SUCCESS;
}