Difference between revisions of "ITK/Examples/EdgesAndGradients/GradientMagnitudeImageFilter"
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Daviddoria (talk | contribs) (Created page with "==GradientMagnitudeImageFilter.cxx== <source lang="cpp"> #include <string> #include "itkImage.h" #include "itkImageFileReader.h" #include "itkImageFileWriter.h" #include "itkRes...") |
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==GradientMagnitudeImageFilter.cxx== | ==GradientMagnitudeImageFilter.cxx== | ||
<source lang="cpp"> | <source lang="cpp"> | ||
#include "itkImage.h" | #include "itkImage.h" | ||
#include "itkImageFileReader.h" | #include "itkImageFileReader.h" | ||
Line 8: | Line 6: | ||
#include "itkRescaleIntensityImageFilter.h" | #include "itkRescaleIntensityImageFilter.h" | ||
#include "itkGradientMagnitudeImageFilter.h" | #include "itkGradientMagnitudeImageFilter.h" | ||
#include <itkImageToVTKImageFilter.h> | |||
#include "vtkImageViewer.h" | |||
#include "vtkRenderWindowInteractor.h" | |||
#include "vtkSmartPointer.h" | |||
#include "vtkImageActor.h" | |||
#include "vtkInteractorStyleImage.h" | |||
#include "vtkRenderer.h" | |||
int main(int argc, char * argv[]) | int main(int argc, char * argv[]) | ||
{ | { | ||
// Verify command line arguments | // Verify command line arguments | ||
if( argc < | if( argc < 2 ) | ||
{ | { | ||
std::cerr << "Usage: " << std::endl; | std::cerr << "Usage: " << std::endl; | ||
std::cerr << argv[0] << " | std::cerr << argv[0] << "inputImageFile" << std::endl; | ||
return EXIT_FAILURE; | return EXIT_FAILURE; | ||
} | } | ||
Line 21: | Line 28: | ||
// Parse command line arguments | // Parse command line arguments | ||
std::string inputFilename = argv[1]; | std::string inputFilename = argv[1]; | ||
// Setup types | // Setup types | ||
typedef | typedef itk::Image< float, 2 > FloatImageType; | ||
typedef | typedef itk::Image< unsigned char, 2 > UnsignedCharImageType; | ||
typedef itk::ImageFileReader< UnsignedCharImageType > readerType; | |||
typedef itk::ImageFileReader< | |||
typedef itk::GradientMagnitudeImageFilter< | typedef itk::GradientMagnitudeImageFilter< | ||
UnsignedCharImageType, FloatImageType > filterType; | |||
// Create and setup a reader | // Create and setup a reader | ||
Line 46: | Line 49: | ||
// To write the gradient image file, we must rescale the gradient values | // To write the gradient image file, we must rescale the gradient values | ||
// to a reasonable range | // to a reasonable range | ||
typedef itk::RescaleIntensityImageFilter< | typedef itk::RescaleIntensityImageFilter< | ||
FloatImageType, UnsignedCharImageType > rescaleFilterType; | |||
rescaleFilterType::Pointer rescaler = rescaleFilterType::New(); | rescaleFilterType::Pointer rescaler = rescaleFilterType::New(); | ||
rescaler->SetOutputMinimum( | rescaler->SetOutputMinimum(0); | ||
rescaler->SetOutputMaximum( 255 ); | rescaler->SetOutputMaximum(255); | ||
rescaler->SetInput( gradientFilter->GetOutput() ); | rescaler->SetInput( gradientFilter->GetOutput() ); | ||
rescaler->Update(); | |||
typedef itk::ImageToVTKImageFilter<UnsignedCharImageType> ConnectorType; | |||
ConnectorType::Pointer originalConnector = ConnectorType::New(); | |||
originalConnector->SetInput(reader->GetOutput()); | |||
vtkSmartPointer<vtkImageActor> originalActor = | |||
vtkSmartPointer<vtkImageActor>::New(); | |||
originalActor->SetInput(originalConnector->GetOutput()); | |||
typedef itk::ImageToVTKImageFilter<UnsignedCharImageType> ConnectorType; | |||
ConnectorType::Pointer gradientMagnitudeConnector = ConnectorType::New(); | |||
gradientMagnitudeConnector->SetInput(rescaler->GetOutput()); | |||
vtkSmartPointer<vtkImageActor> gradientMagnitudeActor = | |||
vtkSmartPointer<vtkImageActor>::New(); | |||
gradientMagnitudeActor->SetInput(gradientMagnitudeConnector->GetOutput()); | |||
// Define viewport ranges | |||
// (xmin, ymin, xmax, ymax) | |||
double leftViewport[4] = {0.0, 0.0, 0.5, 1.0}; | |||
double rightViewport[4] = {0.5, 0.0, 1.0, 1.0}; | |||
// Setup both renderers | |||
vtkSmartPointer<vtkRenderWindow> renderWindow = | |||
vtkSmartPointer<vtkRenderWindow>::New(); | |||
renderWindow->SetSize(600,300); | |||
vtkSmartPointer<vtkRenderer> leftRenderer = | |||
vtkSmartPointer<vtkRenderer>::New(); | |||
renderWindow->AddRenderer(leftRenderer); | |||
leftRenderer->SetViewport(leftViewport); | |||
vtkSmartPointer<vtkRenderer> rightRenderer = | |||
vtkSmartPointer<vtkRenderer>::New(); | |||
renderWindow->AddRenderer(rightRenderer); | |||
rightRenderer->SetViewport(rightViewport); | |||
leftRenderer->AddActor(originalActor); | |||
rightRenderer->AddActor(gradientMagnitudeActor); | |||
vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = | |||
vtkSmartPointer<vtkRenderWindowInteractor>::New(); | |||
vtkSmartPointer<vtkInteractorStyleImage> style = | |||
vtkSmartPointer<vtkInteractorStyleImage>::New(); | |||
renderWindowInteractor->SetInteractorStyle(style); | |||
renderWindowInteractor->SetRenderWindow(renderWindow); | |||
renderWindowInteractor->Initialize(); | |||
renderWindowInteractor->Start(); | |||
return | return EXIT_SUCCESS; | ||
} | } | ||
</source> | </source> |
Revision as of 14:56, 22 October 2010
GradientMagnitudeImageFilter.cxx
#include "itkImage.h"
#include "itkImageFileReader.h"
#include "itkImageFileWriter.h"
#include "itkRescaleIntensityImageFilter.h"
#include "itkGradientMagnitudeImageFilter.h"
#include <itkImageToVTKImageFilter.h>
#include "vtkImageViewer.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkSmartPointer.h"
#include "vtkImageActor.h"
#include "vtkInteractorStyleImage.h"
#include "vtkRenderer.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::GradientMagnitudeImageFilter<
UnsignedCharImageType, FloatImageType > filterType;
// Create and setup a reader
readerType::Pointer reader = readerType::New();
reader->SetFileName( inputFilename.c_str() );
// Create and setup a gradient filter
filterType::Pointer gradientFilter = filterType::New();
gradientFilter->SetInput( reader->GetOutput() );
gradientFilter->Update();
// To write the gradient image file, we must rescale the gradient values
// to a reasonable range
typedef itk::RescaleIntensityImageFilter<
FloatImageType, UnsignedCharImageType > rescaleFilterType;
rescaleFilterType::Pointer rescaler = rescaleFilterType::New();
rescaler->SetOutputMinimum(0);
rescaler->SetOutputMaximum(255);
rescaler->SetInput( gradientFilter->GetOutput() );
rescaler->Update();
typedef itk::ImageToVTKImageFilter<UnsignedCharImageType> ConnectorType;
ConnectorType::Pointer originalConnector = ConnectorType::New();
originalConnector->SetInput(reader->GetOutput());
vtkSmartPointer<vtkImageActor> originalActor =
vtkSmartPointer<vtkImageActor>::New();
originalActor->SetInput(originalConnector->GetOutput());
typedef itk::ImageToVTKImageFilter<UnsignedCharImageType> ConnectorType;
ConnectorType::Pointer gradientMagnitudeConnector = ConnectorType::New();
gradientMagnitudeConnector->SetInput(rescaler->GetOutput());
vtkSmartPointer<vtkImageActor> gradientMagnitudeActor =
vtkSmartPointer<vtkImageActor>::New();
gradientMagnitudeActor->SetInput(gradientMagnitudeConnector->GetOutput());
// Define viewport ranges
// (xmin, ymin, xmax, ymax)
double leftViewport[4] = {0.0, 0.0, 0.5, 1.0};
double rightViewport[4] = {0.5, 0.0, 1.0, 1.0};
// Setup both renderers
vtkSmartPointer<vtkRenderWindow> renderWindow =
vtkSmartPointer<vtkRenderWindow>::New();
renderWindow->SetSize(600,300);
vtkSmartPointer<vtkRenderer> leftRenderer =
vtkSmartPointer<vtkRenderer>::New();
renderWindow->AddRenderer(leftRenderer);
leftRenderer->SetViewport(leftViewport);
vtkSmartPointer<vtkRenderer> rightRenderer =
vtkSmartPointer<vtkRenderer>::New();
renderWindow->AddRenderer(rightRenderer);
rightRenderer->SetViewport(rightViewport);
leftRenderer->AddActor(originalActor);
rightRenderer->AddActor(gradientMagnitudeActor);
vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
vtkSmartPointer<vtkRenderWindowInteractor>::New();
vtkSmartPointer<vtkInteractorStyleImage> style =
vtkSmartPointer<vtkInteractorStyleImage>::New();
renderWindowInteractor->SetInteractorStyle(style);
renderWindowInteractor->SetRenderWindow(renderWindow);
renderWindowInteractor->Initialize();
renderWindowInteractor->Start();
return EXIT_SUCCESS;
}
CMakeLists.txt
cmake_minimum_required(VERSION 2.6)
PROJECT(GradientMagnitudeImageFilter)
FIND_PACKAGE(ITK REQUIRED)
INCLUDE(${ITK_USE_FILE})
ADD_EXECUTABLE(GradientMagnitudeImageFilter GradientMagnitudeImageFilter.cxx)
TARGET_LINK_LIBRARIES(Gradient ITKNumerics ITKIO ITKAlgorithms)