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ImageReslice

vtk-examples/Cxx/ImageData/ImageReslice

Question

If you have a question about this example, please use the VTK Discourse Forum

Code

ImageReslice.cxx

#include <vtkActor.h>
#include <vtkImageData.h>
#include <vtkImageReslice.h>
#include <vtkIntArray.h>
#include <vtkNew.h>
#include <vtkProperty2D.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>

int main(int, char*[])
{
  vtkNew<vtkImageData> image;
  image->SetExtent(0, 9, 0, 9, 0, 0);
  image->AllocateScalars(VTK_INT, 1);

  int* pixel = static_cast<int*>(image->GetScalarPointer(0, 9, 0));
  std::cout << "pixel: " << *pixel << std::endl;

  vtkNew<vtkImageReslice> reslice;
  reslice->SetOutputExtent(0, 9, 0, 100, 0, 0);
  reslice->SetInputData(image);
  reslice->Update();

  int* pixel2 =
      static_cast<int*>(reslice->GetOutput()->GetScalarPointer(0, 11, 0));
  std::cout << "pixel2: " << *pixel2 << std::endl;

  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.3 FATAL_ERROR)

project(ImageReslice)

find_package(VTK COMPONENTS 
  vtkCommonCore
  vtkCommonDataModel
  vtkImagingCore
  vtkInteractionStyle
  vtkRenderingContextOpenGL2
  vtkRenderingCore
  vtkRenderingFreeType
  vtkRenderingGL2PSOpenGL2
  vtkRenderingOpenGL2
  QUIET
)

if (NOT VTK_FOUND)
  message("Skipping ImageReslice: ${VTK_NOT_FOUND_MESSAGE}")
  return ()
endif()
message (STATUS "VTK_VERSION: ${VTK_VERSION}")
if (VTK_VERSION VERSION_LESS "8.90.0")
  # old system
  include(${VTK_USE_FILE})
  add_executable(ImageReslice MACOSX_BUNDLE ImageReslice.cxx )
  target_link_libraries(ImageReslice PRIVATE ${VTK_LIBRARIES})
else ()
  # include all components
  add_executable(ImageReslice MACOSX_BUNDLE ImageReslice.cxx )
  target_link_libraries(ImageReslice PRIVATE ${VTK_LIBRARIES})
  # vtk_module_autoinit is needed
  vtk_module_autoinit(
    TARGETS ImageReslice
    MODULES ${VTK_LIBRARIES}
    )
endif ()

Download and Build ImageReslice

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

cd ImageReslice/build

If VTK is installed:

cmake ..

If VTK is not installed but compiled on your system, you will need to specify the path to your VTK build:

cmake -DVTK_DIR:PATH=/home/me/vtk_build ..

Build the project:

make

and run it:

./ImageReslice

WINDOWS USERS

Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.