ITK/Examples/Developer/ImageFilterMultipleInputs

ImageFilterMultipleInput.cxx

<source lang="cpp">

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

1. include "ImageFilterMultipleInputs.h"

int main(int, char*[]) {

 // Setup types
 typedef itk::Image<unsigned char, 2>   ImageType;
 typedef itk::ImageFilterMultipleInputs<ImageType>  FilterType;

 typedef itk::ImageFileReader<ImageType> ReaderType;
 ReaderType::Pointer reader = ReaderType::New();
 reader->SetFileName("Test.jpg");
 reader->Update();
 
 // Create and the filter
 FilterType::Pointer filter = FilterType::New();
 filter->SetInput(reader->GetOutput());
 filter->Update();

 typedef  itk::ImageFileWriter< ImageType  > WriterType;
 WriterType::Pointer writer = WriterType::New();
 writer->SetFileName("TestOutput.jpg");
 writer->SetInput(filter->GetOutput());
 writer->Update();

 return EXIT_SUCCESS;

} </source>

ImageFilterMultipleInputs.h

<source lang="cpp">

1. ifndef __itkImageFilterMultipleInputs_h
2. define __itkImageFilterMultipleInputs_h

1. include "itkImageToImageFilter.h"

namespace itk { template< class TImage> class ImageFilterMultipleInputs : public ImageToImageFilter< TImage, TImage > { public:

 /** Standard class typedefs. */
 typedef ImageFilterMultipleInputs             Self;
 typedef ImageToImageFilter< TImage, TImage > Superclass;
 typedef SmartPointer< Self >        Pointer;

 /** Method for creation through the object factory. */
 itkNewMacro(Self);

 /** Run-time type information (and related methods). */
 itkTypeMacro(ImageFilterMultipleInputs, ImageToImageFilter);

 /** The image to be inpainted in regions where the mask is white.*/
 void SetInputImage(const TImage* image);

 /** The mask to be inpainted. White pixels will be inpainted, black pixels will be passed through to the output.*/
 void SetInputMask(const TImage* mask);
 

protected:

 ImageFilterMultipleInputs();
 ~ImageFilterMultipleInputs(){}

 /** Does the real work. */
 virtual void GenerateData();

private:

 ImageFilterMultipleInputs(const Self &); //purposely not implemented
 void operator=(const Self &);  //purposely not implemented

}; } //namespace ITK

1. ifndef ITK_MANUAL_INSTANTIATION
2. include "ImageFilterMultipleInputs.txx"
3. endif

1. endif // __itkImageFilterMultipleInputs_h

</source>

ImageFilterMultipleInputs.txx

<source lang="cpp">

1. ifndef __itkImageFilterMultipleInputs_txx
2. define __itkImageFilterMultipleInputs_txx

1. include "ImageFilterMultipleInputs.h"

1. include "itkObjectFactory.h"
2. include "itkImageRegionIterator.h"
3. include "itkImageRegionConstIterator.h"

namespace itk {

template< class TImage> ImageFilterMultipleInputs<TImage>::ImageFilterMultipleInputs() {

 this->SetNumberOfRequiredInputs(2);

}

template< class TImage> void ImageFilterMultipleInputs<TImage>::SetInputImage(const TImage* image) {

 SetNthInput(0, const_cast<TImage*>(image));

}

template< class TImage> void ImageFilterMultipleInputs<TImage>::SetInputMask(const TImage* mask) {

 SetNthInput(1, const_cast<TImage*>(mask));

}

template< class TImage> void ImageFilterMultipleInputs<TImage>::GenerateData() {

 typename TImage::ConstPointer input = this->GetInput();
 
 typename TImage::Pointer output = this->GetOutput();
 output->SetRegions(input->GetLargestPossibleRegion());
 output->Allocate();  
 
 itk::ImageRegionIterator<TImage> outputIterator(output, output->GetLargestPossibleRegion());
 itk::ImageRegionConstIterator<TImage> inputIterator(input, input->GetLargestPossibleRegion());

 while(!outputIterator.IsAtEnd())
   {
   if(inputIterator.GetIndex()[0] == inputIterator.GetIndex()[1])
     {
     outputIterator.Set(255);
     }
   else
     {
     outputIterator.Set(inputIterator.Get());
     }

   ++inputIterator;
   ++outputIterator;
   }

}

}// end namespace

1. endif

</source>

CMakeLists.txt

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

project(ImageFilterMultipleInputs)

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

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

endif()

add_executable(ImageFilterMultipleInputs MACOSX_BUNDLE ImageFilterMultipleInputs.cxx)

if( "${ITK_VERSION_MAJOR}" LESS 4 )

 target_link_libraries(ImageFilterMultipleInputs ITKReview ${ITK_LIBRARIES})

else( "${ITK_VERSION_MAJOR}" LESS 4 )

 target_link_libraries(ImageFilterMultipleInputs ${ITK_LIBRARIES})

endif( "${ITK_VERSION_MAJOR}" LESS 4 )

</syntaxhighlight>

Download and Build ImageFilterMultipleInputs

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

cd ImageFilterMultipleInputs/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:

./ImageFilterMultipleInputs

WINDOWS USERS PLEASE NOTE: Be sure to add the ITK bin directory to your path. This will resolve the 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.