ITK/Examples/ImageProcessing/ClampImageFilter: Difference between revisions

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(Created page with "==ClampImageFilter.cxx== <source lang="cpp"> #include "itkImage.h" #include "itkImageFileReader.h" #include "itkClampImageFilter.h" int main(int argc, char *argv[]) { if(argc ...")
 
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#include "itkImageFileReader.h"
#include "itkImageFileReader.h"
#include "itkClampImageFilter.h"
#include "itkClampImageFilter.h"
typedef itk::Image<float, 2>  FloatImageType;
typedef itk::Image<unsigned char, 2>  UnsignedCharImageType;
static void CreateImage(FloatImageType* const image);


int main(int argc, char *argv[])
int main(int argc, char *argv[])
{
{
  FloatImageType::Pointer image;
  // No input image argument provided
   if(argc < 2)
   if(argc < 2)
     {
     {
     std::cerr << "Required: filename" << std::endl;
     image = FloatImageType::New();
     return EXIT_FAILURE;
    CreateImage(image);
    }
  else // Input image argument provided
    {
    typedef itk::ImageFileReader<FloatImageType> ReaderType;
    ReaderType::Pointer reader = ReaderType::New();
    reader->SetFileName(argv[1]);
    reader->Update();
     image = reader->GetOutput();
     }
     }
  typedef itk::Image<unsigned char, 2>  UnsignedCharImageType;
  typedef itk::Image<float, 2>  FloatImageType;
  typedef itk::ImageFileReader<FloatImageType> ReaderType;
  ReaderType::Pointer reader = ReaderType::New();
  reader->SetFileName(argv[1]);


   typedef itk::ClampImageFilter< FloatImageType, UnsignedCharImageType > ClampFilterType;
   typedef itk::ClampImageFilter< FloatImageType, UnsignedCharImageType > ClampFilterType;
   ClampFilterType::Pointer clampFilter = ClampFilterType::New();
   ClampFilterType::Pointer clampFilter = ClampFilterType::New();
   clampFilter->SetInput(reader->GetOutput());
   clampFilter->SetInput(image);
   clampFilter->Update();
   clampFilter->Update();


   return EXIT_SUCCESS;
   return EXIT_SUCCESS;
}
void CreateImage(FloatImageType* const image)
{
  // Create an image with 2 connected components
  FloatImageType::IndexType corner = {{0,0}};
  FloatImageType::SizeType size;
  unsigned int NumRows = 200;
  unsigned int NumCols = 300;
  size[0] = NumRows;
  size[1] = NumCols;
  FloatImageType::RegionType region(corner, size);
  image->SetRegions(region);
  image->Allocate();
  // Make a square
  for(unsigned int r = 40; r < 100; r++)
    {
    for(unsigned int c = 40; c < 100; c++)
      {
      FloatImageType::IndexType pixelIndex;
      pixelIndex[0] = r;
      pixelIndex[1] = c;
      image->SetPixel(pixelIndex, 15);
      }
    }
}
}



Revision as of 11:36, 22 June 2012

ClampImageFilter.cxx

<source lang="cpp">

  1. include "itkImage.h"
  2. include "itkImageFileReader.h"
  3. include "itkClampImageFilter.h"

typedef itk::Image<float, 2> FloatImageType; typedef itk::Image<unsigned char, 2> UnsignedCharImageType;

static void CreateImage(FloatImageType* const image);

int main(int argc, char *argv[]) {

 FloatImageType::Pointer image;
 // No input image argument provided
 if(argc < 2)
   {
   image = FloatImageType::New();
   CreateImage(image);
   }
 else // Input image argument provided
   {
   typedef itk::ImageFileReader<FloatImageType> ReaderType;
   ReaderType::Pointer reader = ReaderType::New();
   reader->SetFileName(argv[1]);
   reader->Update();
   image = reader->GetOutput();
   }
 typedef itk::ClampImageFilter< FloatImageType, UnsignedCharImageType > ClampFilterType;
 ClampFilterType::Pointer clampFilter = ClampFilterType::New();
 clampFilter->SetInput(image);
 clampFilter->Update();
 return EXIT_SUCCESS;

}

void CreateImage(FloatImageType* const image) {

 // Create an image with 2 connected components
 FloatImageType::IndexType corner = Template:0,0;
 FloatImageType::SizeType size;
 unsigned int NumRows = 200;
 unsigned int NumCols = 300;
 size[0] = NumRows;
 size[1] = NumCols;
 FloatImageType::RegionType region(corner, size);
 image->SetRegions(region);
 image->Allocate();
 // Make a square
 for(unsigned int r = 40; r < 100; r++)
   {
   for(unsigned int c = 40; c < 100; c++)
     {
     FloatImageType::IndexType pixelIndex;
     pixelIndex[0] = r;
     pixelIndex[1] = c;
     image->SetPixel(pixelIndex, 15);
     }
   }

}

</source>

CMakeLists.txt

<syntaxhighlight lang="cmake"> cmake_minimum_required(VERSION 3.9.5)

project(ClampImageFilter)

find_package(ITK REQUIRED) include(${ITK_USE_FILE}) if (ITKVtkGlue_LOADED)

 find_package(VTK REQUIRED)
 include(${VTK_USE_FILE})

else()

 find_package(ItkVtkGlue REQUIRED)
 include(${ItkVtkGlue_USE_FILE})
 set(Glue ItkVtkGlue)

endif()

add_executable(ClampImageFilter MACOSX_BUNDLE ClampImageFilter.cxx) target_link_libraries(ClampImageFilter

 ${Glue}  ${VTK_LIBRARIES} ${ITK_LIBRARIES})

</syntaxhighlight>

Download and Build ClampImageFilter

Click here to download ClampImageFilter. and its CMakeLists.txt file. Once the tarball ClampImageFilter.tar has been downloaded and extracted,

cd ClampImageFilter/build 
  • If ITK is installed:
cmake ..
  • If ITK is not installed but compiled on your system, you will need to specify the path to your ITK build:
cmake -DITK_DIR:PATH=/home/me/itk_build ..

Build the project,

make

and run it:

./ClampImageFilter

WINDOWS USERS PLEASE NOTE: Be sure to add the VTK and ITK bin directories to your path. This will resolve the VTK and ITK dll's at run time.

Building All of the Examples

Many of the examples in the ITK Wiki Examples Collection require VTK. You can build all of the the examples by following these instructions. If you are a new VTK user, you may want to try the Superbuild which will build a proper ITK and VTK.

ItkVtkGlue

ITK >= 4

For examples that use QuickView (which depends on VTK), you must have built ITK with Module_ITKVtkGlue=ON.

ITK < 4

Some of the ITK Examples require VTK to display the images. If you download the entire ITK Wiki Examples Collection, the ItkVtkGlue directory will be included and configured. If you wish to just build a few examples, then you will need to download ItkVtkGlue and build it. When you run cmake it will ask you to specify the location of the ItkVtkGlue binary directory.