/*
* What is the input requested region that is required to produce the output
* requested region? By default, the largest possible region is always
* required but this is overridden in many subclasses. For instance, for an
* image processing filter where an output pixel is a simple function of an
* input pixel, the input requested region will be set to the output
* requested region. For an image processing filter where an output pixel is
* a function of the pixels in a neighborhood of an input pixel, then the
* input requested region will need to be larger than the output requested
* region (to avoid introducing artificial boundary conditions). This
* function should never request an input region that is outside the the
* input largest possible region (i.e. implementations of this method should
* crop the input requested region at the boundaries of the input largest
* possible region).
*/
void mitk::ExtractImageFilter::GenerateInputRequestedRegion()
{
Superclass::GenerateInputRequestedRegion();
ImageToImageFilter::InputImagePointer input = const_cast< ImageToImageFilter::InputImageType* > ( this->GetInput() );
Image::Pointer output = this->GetOutput();
if (input->GetDimension() == 2)
{
input->SetRequestedRegionToLargestPossibleRegion();
return;
}
Image::RegionType requestedRegion;
requestedRegion = output->GetRequestedRegion();
requestedRegion.SetIndex(0, 0);
requestedRegion.SetIndex(1, 0);
requestedRegion.SetIndex(2, 0);
requestedRegion.SetSize(0, input->GetDimension(0));
requestedRegion.SetSize(1, input->GetDimension(1));
requestedRegion.SetSize(2, input->GetDimension(2));
requestedRegion.SetIndex( m_SliceDimension, m_SliceIndex ); // only one slice needed
requestedRegion.SetSize( m_SliceDimension, 1 );
input->SetRequestedRegion( &requestedRegion );
}
void mitk::ExtractSliceFilter::GenerateInputRequestedRegion(){
//As we want all pixel information fo the image in our plane, the requested region
//is set to the largest possible region in the image.
//This is needed because an oblique plane has a larger extent then the image
//and the in pipeline it is checked via PropagateResquestedRegion(). But the
//extent of the slice is actually fitting because it is oblique within the image.
ImageToImageFilter::InputImagePointer input = const_cast< ImageToImageFilter::InputImageType* > ( this->GetInput() );
input->SetRequestedRegionToLargestPossibleRegion();
}