ITK/Examples/Images/ConstantPadImageFilter

ConstantPadImageFilter.cxx

<source lang="cpp">

1. include "itkImage.h"
2. include "itkImageFileWriter.h"
3. include "itkRescaleIntensityImageFilter.h"
4. include "itkConstantPadImageFilter.h"
5. include "itkImageRegionIterator.h"

typedef itk::Image<unsigned char, 2> ImageType;

static void CreateImage(ImageType::Pointer image); static void WriteImage(ImageType::Pointer image, std::string filename);

int main(int, char *[]) {

 ImageType::Pointer image = ImageType::New();
 CreateImage(image);
 WriteImage(image, "input.png");

 typedef itk::ConstantPadImageFilter <ImageType, ImageType>
   ConstantPadImageFilterType;

 ImageType::SizeType lowerExtendRegion;
 lowerExtendRegion[0] = 10;
 lowerExtendRegion[1] = 10;

 ImageType::SizeType upperExtendRegion;
 upperExtendRegion[0] = 50;
 upperExtendRegion[1] = 50;

 ImageType::PixelType constantPixel = 100;

 ConstantPadImageFilterType::Pointer padFilter
   = ConstantPadImageFilterType::New();
 padFilter->SetInput(image);
 //padFilter->SetPadBound(outputRegion); // Calls SetPadLowerBound(region) and SetPadUpperBound(region)
 padFilter->SetPadLowerBound(lowerExtendRegion);
 padFilter->SetPadUpperBound(upperExtendRegion);
 padFilter->SetConstant(constantPixel);
 padFilter->Update();

 WriteImage(padFilter->GetOutput(), "output.png");

 return EXIT_SUCCESS;

}

void CreateImage(ImageType::Pointer image) {

 // Create an image
 ImageType::IndexType start;
 start.Fill(0);

 ImageType::SizeType size;
 size.Fill(100);

 ImageType::RegionType region(start, size);

 image->SetRegions(region);
 image->Allocate();
 image->FillBuffer(0);

}

void WriteImage(ImageType::Pointer image, std::string filename) {

 typedef  itk::ImageFileWriter< ImageType  > WriterType;
 WriterType::Pointer writer = WriterType::New();
 writer->SetFileName(filename);
 writer->SetInput(image);
 writer->Update();

} </source>

CMakeLists.txt

<source lang="cmake"> cmake_minimum_required(VERSION 2.6)

PROJECT(ConstantPadImageFilter)

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(ConstantPadImageFilter ConstantPadImageFilter.cxx) TARGET_LINK_LIBRARIES(ConstantPadImageFilter vtkHybrid ${ITK_LIBRARIES})

</source>