ITK/Examples/ImageProcessing/TileImageFilter CreateVolume

This example reads in a series of 2D images and stacks them to create a 3D image.

TileImageFilter_CreateVolume.cxx

<source lang="cpp">

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

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

 typedef unsigned char  PixelType;
 const unsigned int InputImageDimension = 2;
 const unsigned int OutputImageDimension = 3;

 typedef itk::Image< PixelType, InputImageDimension  >   InputImageType;
 typedef itk::Image< PixelType, OutputImageDimension >   OutputImageType;

 typedef itk::ImageFileReader< InputImageType > ImageReaderType ;

 typedef itk::TileImageFilter< InputImageType, OutputImageType > TilerType;

 typedef itk::ImageFileWriter< OutputImageType > WriterType;

 if (argc < 4)
   {
   std::cerr << "Usage: " << std::endl;
   std::cerr << argv[0] << "input1 input2 ... inputn output" << std::endl;
   return EXIT_FAILURE;
   }

 TilerType::Pointer tiler = TilerType::New();

 itk::FixedArray< unsigned int, OutputImageDimension > layout;

 layout[0] = 2;
 layout[1] = 2;
 layout[2] = 0;

 tiler->SetLayout( layout );

 unsigned int inputImageNumber = 0;

 ImageReaderType::Pointer reader = ImageReaderType::New();

 InputImageType::Pointer inputImageTile;

 for (int i = 1; i < argc - 1; i++)
   {
   reader->SetFileName( argv[i] );
   reader->UpdateLargestPossibleRegion();
   inputImageTile = reader->GetOutput();
   inputImageTile->DisconnectPipeline();
   tiler->SetInput( inputImageNumber++, inputImageTile );
   }

 PixelType filler = 128;

 tiler->SetDefaultPixelValue( filler );

 tiler->Update();

 WriterType::Pointer writer = WriterType::New();

 writer->SetInput( tiler->GetOutput() );

 writer->SetFileName( argv[argc-1] );

 try
   {
   writer->Update();
   }
 catch( itk::ExceptionObject & excp )
   {
   std::cerr << excp << std::endl;
   return EXIT_FAILURE;
   }

 return EXIT_SUCCESS;

} </source>

CMakeLists.txt

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

project(TileImageFilter_CreateVolume)

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

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

endif()

add_executable(TileImageFilter_CreateVolume MACOSX_BUNDLE TileImageFilter_CreateVolume.cxx)

if( "${ITK_VERSION_MAJOR}" LESS 4 )

 target_link_libraries(TileImageFilter_CreateVolume ITKReview ${ITK_LIBRARIES})

else( "${ITK_VERSION_MAJOR}" LESS 4 )

 target_link_libraries(TileImageFilter_CreateVolume ${ITK_LIBRARIES})

endif( "${ITK_VERSION_MAJOR}" LESS 4 )

</syntaxhighlight>

Download and Build TileImageFilter_CreateVolume

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

cd TileImageFilter_CreateVolume/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:

./TileImageFilter_CreateVolume

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.