Method GenerateOutputInformation

Modules/AlgorithmsExt/src/mitkAutoCropImageFilter.cpp:71–188

}

void mitk::AutoCropImageFilter::GenerateOutputInformation()
{
  mitk::Image::Pointer input = const_cast<mitk::Image *>(this->GetInput());
  mitk::Image::Pointer output = this->GetOutput();

  if (input->GetDimension() <= 2)
  {
    MITK_ERROR << "Only 3D any 4D images are supported." << std::endl;
    return;
  }

  ComputeNewImageBounds();

  if ((output->IsInitialized()) && (output->GetPipelineMTime() <= m_TimeOfHeaderInitialization.GetMTime()))
    return;

  itkDebugMacro(<< "GenerateOutputInformation()");

  // PART I: initialize input requested region. We do this already here (and not
  // later when GenerateInputRequestedRegion() is called), because we
  // also need the information to setup the output.

  // pre-initialize input-requested-region to largest-possible-region
  // and correct time-region; spatial part will be cropped by
  // bounding-box of bounding-object below
  m_InputRequestedRegion = input->GetLargestPossibleRegion();

  // build region out of index and size calculated in ComputeNewImageBounds()

  mitk::SlicedData::IndexType index;
  index[0] = m_RegionIndex[0];
  index[1] = m_RegionIndex[1];
  index[2] = m_RegionIndex[2];
  index[3] = m_InputRequestedRegion.GetIndex()[3];
  index[4] = m_InputRequestedRegion.GetIndex()[4];

  mitk::SlicedData::SizeType size;
  size[0] = m_RegionSize[0];
  size[1] = m_RegionSize[1];
  size[2] = m_RegionSize[2];
  size[3] = m_InputRequestedRegion.GetSize()[3];
  size[4] = m_InputRequestedRegion.GetSize()[4];

  mitk::SlicedData::RegionType cropRegion(index, size);

  // crop input-requested-region with cropping region computed from the image data
  if (m_InputRequestedRegion.Crop(cropRegion) == false)
  {
    // crop not possible => do nothing: set time size to 0.
    size.Fill(0);
    m_InputRequestedRegion.SetSize(size);
    return;
  }

  // set input-requested-region, because we access it later in
  // GenerateInputRequestedRegion (there we just set the time)
  input->SetRequestedRegion(&m_InputRequestedRegion);