ITK/Examples/Images/ConstantPadImageFilter

ConstantPadImageFilter.cxx

<source lang="cpp">

1. include "itkImage.h"
2. include "itkConstantPadImageFilter.h"
3. include "itkImageRegionIterator.h"

1. include "QuickView.h"

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

static void CreateImage(ImageType::Pointer image);

int main(int, char *[]) {

 ImageType::Pointer image = ImageType::New();
 CreateImage(image);

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

 ImageType::SizeType lowerExtendRegion;
 lowerExtendRegion[0] = 20;
 lowerExtendRegion[1] = 30;

 ImageType::SizeType upperExtendRegion;
 upperExtendRegion[0] = 50;
 upperExtendRegion[1] = 40;

 ImageType::PixelType constantPixel = 100;

 ConstantPadImageFilterType::Pointer padFilter
   = ConstantPadImageFilterType::New();
 padFilter->SetInput(image);
 padFilter->SetPadLowerBound(lowerExtendRegion);
 padFilter->SetPadUpperBound(upperExtendRegion);
 padFilter->SetConstant(constantPixel);

 QuickView viewer;
 viewer.AddImage<ImageType>(image);
 viewer.AddImage<ImageType>(padFilter->GetOutput());
 viewer.Visualize();

 return EXIT_SUCCESS;

}

void CreateImage(ImageType::Pointer image) {

 // Create an image
 ImageType::RegionType region;
 ImageType::IndexType start;
 start[0] = 0;
 start[1] = 0;

 ImageType::SizeType size;
 unsigned int NumRows = 200;
 unsigned int NumCols = 300;
 size[0] = NumRows;
 size[1] = NumCols;

 region.SetSize(size);
 region.SetIndex(start);

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

 // Make the whole image white
 itk::ImageRegionIterator<ImageType> iterator(image,image->GetLargestPossibleRegion());

 while(!iterator.IsAtEnd())
   {
   iterator.Set(255);
   ++iterator;
   }

} </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 ITKBasicFilters ITKCommon ITKIO)

</source>