ITK/Examples/EdgesAndGradients/RecursiveGaussianImageFilter
This example demonstrates how to compute the derivative of an image in a specified axis-aligned direction. The original image and its x gradient are displayed on the screen.
RecursiveGaussianImageFilter.cxx
<source lang="cpp">
- include "itkImage.h"
- include "itkImageFileReader.h"
- include "itkImageFileWriter.h"
- include "itkRescaleIntensityImageFilter.h"
- include "itkRecursiveGaussianImageFilter.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;
typedef itk::ImageFileReader< UnsignedCharImageType > readerType;
typedef itk::RecursiveGaussianImageFilter<
UnsignedCharImageType, FloatImageType > filterType;
// Create and setup a reader readerType::Pointer reader = readerType::New(); reader->SetFileName( inputFilename.c_str() );
// Create and setup a gaussian filter filterType::Pointer gaussianFilter = filterType::New(); gaussianFilter->SetInput( reader->GetOutput() ); gaussianFilter->SetDirection(0); // "x" axis gaussianFilter->SetSecondOrder();
QuickView viewer; viewer.AddImage<UnsignedCharImageType>(reader->GetOutput()); viewer.AddImage<FloatImageType>(gaussianFilter->GetOutput()); viewer.Visualize();
return EXIT_SUCCESS;
} </source>
CMakeLists.txt
<source lang="cmake"> cmake_minimum_required(VERSION 2.6)
PROJECT(RecursiveGaussianImageFilter)
include_directories(/home/doriad/src/ITK/Wrapping/WrapITK/ExternalProjects/ItkVtkGlue/src/)
FIND_PACKAGE(VTK REQUIRED) INCLUDE(${VTK_USE_FILE})
FIND_PACKAGE(ITK REQUIRED) INCLUDE(${ITK_USE_FILE})
ADD_EXECUTABLE(RecursiveGaussianImageFilter RecursiveGaussianImageFilter.cxx) TARGET_LINK_LIBRARIES(RecursiveGaussianImageFilter vtkHybrid ITKBasicFilters ITKIO ITKCommon)
</source>