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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 itkBoxMeanImageFilter_hxx
#define itkBoxMeanImageFilter_hxx
#include "itkProgressAccumulator.h"
#include "itkBoxUtilities.h"
/*
*
* This code was contributed in the Insight Journal paper:
* "Efficient implementation of kernel filtering"
* by Beare R., Lehmann G
* https://www.insight-journal.org/browse/publication/160
*
*/
namespace itk
{
template <typename TInputImage, typename TOutputImage>
BoxMeanImageFilter<TInputImage, TOutputImage>::BoxMeanImageFilter()
{
this->DynamicMultiThreadingOn();
}
template <typename TInputImage, typename TOutputImage>
void
BoxMeanImageFilter<TInputImage, TOutputImage>::DynamicThreadedGenerateData(
const OutputImageRegionType & outputRegionForThread)
{
// Accumulate type is too small
using AccPixType = typename NumericTraits<PixelType>::RealType;
using AccumImageType = Image<AccPixType, TInputImage::ImageDimension>;
typename TInputImage::SizeType internalRadius;
for (unsigned int i = 0; i < TInputImage::ImageDimension; ++i)
{
internalRadius[i] = this->GetRadius()[i] + 1;
}
const InputImageType * inputImage = this->GetInput();
OutputImageType * outputImage = this->GetOutput();
RegionType accumRegion = outputRegionForThread;
accumRegion.PadByRadius(internalRadius);
accumRegion.Crop(inputImage->GetRequestedRegion());
auto accImage = AccumImageType::New();
accImage->SetRegions(accumRegion);
accImage->Allocate();
#if defined(ITKV4_COMPATIBILITY)
// Dummy reporter for compatibility
ProgressReporter progress(this, 1, 2 * accumRegion.GetNumberOfPixels());
#endif
BoxAccumulateFunction<TInputImage, AccumImageType>(inputImage,
accImage,
accumRegion,
accumRegion
#if defined(ITKV4_COMPATIBILITY)
,
progress);
#else
);
#endif
BoxMeanCalculatorFunction<AccumImageType, TOutputImage>(accImage.GetPointer(),
outputImage,
accumRegion,
outputRegionForThread,
this->GetRadius()
#if defined(ITKV4_COMPATIBILITY)
,
progress);
#else
);
#endif
}
} // end namespace itk
#endif
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