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/*=========================================================================
*
* Copyright NumFOCUS
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
#ifndef itkRegionOfInterestImageFilter_hxx
#define itkRegionOfInterestImageFilter_hxx
#include "itkImageAlgorithm.h"
#include "itkObjectFactory.h"
#include "itkTotalProgressReporter.h"
#include "itkImage.h"
namespace itk
{
template <typename TInputImage, typename TOutputImage>
RegionOfInterestImageFilter<TInputImage, TOutputImage>::RegionOfInterestImageFilter()
{
this->DynamicMultiThreadingOn();
this->ThreaderUpdateProgressOff();
}
template <typename TInputImage, typename TOutputImage>
void
RegionOfInterestImageFilter<TInputImage, TOutputImage>::GenerateInputRequestedRegion()
{
// Call the superclass' implementation of this method
Superclass::GenerateInputRequestedRegion();
// Get pointer to the input
typename Superclass::InputImagePointer inputPtr = const_cast<TInputImage *>(this->GetInput());
if (inputPtr)
{
// Request the region of interest
inputPtr->SetRequestedRegion(m_RegionOfInterest);
}
}
template <typename TInputImage, typename TOutputImage>
void
RegionOfInterestImageFilter<TInputImage, TOutputImage>::EnlargeOutputRequestedRegion(DataObject * output)
{
// Call the superclass' implementation of this method
Superclass::EnlargeOutputRequestedRegion(output);
// Generate everything in the region of interest
output->SetRequestedRegionToLargestPossibleRegion();
}
template <typename TInputImage, typename TOutputImage>
void
RegionOfInterestImageFilter<TInputImage, TOutputImage>::GenerateOutputInformation()
{
// Do not call the superclass' implementation of this method since
// this filter allows the input the output to be of different dimensions
// Get pointers to the input and output
typename Superclass::OutputImagePointer outputPtr = this->GetOutput();
typename Superclass::InputImageConstPointer inputPtr = this->GetInput();
if (!outputPtr || !inputPtr)
{
return;
}
// Set the output image size to the same value as the region of interest.
const RegionType region(m_RegionOfInterest.GetSize());
// Copy Information without modification.
outputPtr->CopyInformation(inputPtr);
// Adjust output region
outputPtr->SetLargestPossibleRegion(region);
// Correct origin of the extracted region.
IndexType roiStart(m_RegionOfInterest.GetIndex());
typename Superclass::OutputImageType::PointType outputOrigin;
inputPtr->TransformIndexToPhysicalPoint(roiStart, outputOrigin);
outputPtr->SetOrigin(outputOrigin);
}
template <typename TInputImage, typename TOutputImage>
void
RegionOfInterestImageFilter<TInputImage, TOutputImage>::DynamicThreadedGenerateData(
const RegionType & outputRegionForThread)
{
// Get the input and output pointers
const TInputImage * inputPtr = this->GetInput();
TOutputImage * outputPtr = this->GetOutput();
TotalProgressReporter progress(this, outputPtr->GetRequestedRegion().GetNumberOfPixels());
// Define the portion of the input to walk for this thread
InputImageRegionType inputRegionForThread;
inputRegionForThread.SetSize(outputRegionForThread.GetSize());
IndexType start;
for (unsigned int i = 0; i < ImageDimension; ++i)
{
start[i] = m_RegionOfInterest.GetIndex()[i] + outputRegionForThread.GetIndex()[i];
}
inputRegionForThread.SetIndex(start);
ImageAlgorithm::Copy(inputPtr, outputPtr, inputRegionForThread, outputRegionForThread);
progress.Completed(outputRegionForThread.GetNumberOfPixels());
}
template <typename TInputImage, typename TOutputImage>
void
RegionOfInterestImageFilter<TInputImage, TOutputImage>::PrintSelf(std::ostream & os, Indent indent) const
{
Superclass::PrintSelf(os, indent);
os << indent << "RegionOfInterest: " << m_RegionOfInterest << std::endl;
}
} // end namespace itk
#endif
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