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itkBlockMatchingSearchRegionImageInitializer.hxx
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itkBlockMatchingSearchRegionImageInitializer.hxx
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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 itkBlockMatchingSearchRegionImageInitializer_hxx
#define itkBlockMatchingSearchRegionImageInitializer_hxx
#include "itkImageRegionIteratorWithIndex.h"
namespace itk
{
namespace BlockMatching
{
template <typename TFixedImage, typename TMovingImage>
SearchRegionImageInitializer<TFixedImage, TMovingImage>::SearchRegionImageInitializer()
: m_Overlap(1.0)
{
m_FixedImage = nullptr;
m_MovingImage = nullptr;
m_FixedBlockRadius.Fill(0);
m_SearchRegionRadius.Fill(0);
}
template <typename TFixedImage, typename TMovingImage>
void
SearchRegionImageInitializer<TFixedImage, TMovingImage>::SetFixedImage(FixedImageType * fixedImage)
{
if (this->m_FixedImage.GetPointer() != fixedImage)
{
this->m_FixedImage = fixedImage;
this->Modified();
}
}
template <typename TFixedImage, typename TMovingImage>
void
SearchRegionImageInitializer<TFixedImage, TMovingImage>::SetMovingImage(MovingImageType * movingImage)
{
if (this->m_MovingImage.GetPointer() != movingImage)
{
this->m_MovingImage = movingImage;
this->Modified();
}
}
template <typename TFixedImage, typename TMovingImage>
void
SearchRegionImageInitializer<TFixedImage, TMovingImage>::BeforeThreadedGenerateData()
{
if (m_MovingImage.GetPointer() == nullptr)
{
itkExceptionMacro(<< "Moving Image is not present.");
}
m_MovingImage->UpdateOutputInformation();
RadiusType nullRadius;
nullRadius.Fill(0);
if (m_SearchRegionRadius == nullRadius)
{
itkExceptionMacro(<< "The SearchRegionRadius has not been set.");
}
}
template <typename TFixedImage, typename TMovingImage>
void
SearchRegionImageInitializer<TFixedImage, TMovingImage>::GenerateOutputInformation()
{
OutputImageType * outputPtr = this->GetOutput();
if (!outputPtr)
{
return;
}
if (m_FixedImage.GetPointer() == nullptr)
{
itkExceptionMacro(<< "Fixed Image is not present.");
}
m_FixedImage->UpdateOutputInformation();
outputPtr->SetDirection(m_FixedImage->GetDirection());
// Set origin. The first block is in the corner of the fixed image.
typename FixedImageType::PointType fixedOrigin = m_FixedImage->GetOrigin();
typename OutputImageType::PointType origin;
typename FixedImageType::SpacingType fixedSpacing = m_FixedImage->GetSpacing();
RadiusType nullRadius;
nullRadius.Fill(0);
if (m_FixedBlockRadius == nullRadius)
{
itkExceptionMacro(<< "The FixedBlockRadius has not been set.");
}
typename FixedImageType::IndexType fixedIndex = m_FixedImage->GetLargestPossibleRegion().GetIndex();
for (unsigned int i = 0; i < ImageDimension; ++i)
{
origin[i] = fixedOrigin[i] + +(fixedIndex[i] + m_FixedBlockRadius[i]) * fixedSpacing[i];
}
outputPtr->SetOrigin(origin);
typename OutputImageType::SpacingType spacing;
for (unsigned int i = 0; i < ImageDimension; ++i)
{
spacing[i] = 2 * m_FixedBlockRadius[i] * fixedSpacing[i] * m_Overlap;
}
outputPtr->SetSpacing(spacing);
OutputRegionType region;
typename OutputRegionType::IndexType index;
index.Fill(0);
region.SetIndex(index);
typename OutputRegionType::SizeType size;
typename FixedImageType::SizeType fixedSize = m_FixedImage->GetLargestPossibleRegion().GetSize();
for (unsigned int i = 0; i < ImageDimension; ++i)
{
size[i] = static_cast<typename OutputRegionType::SizeType::SizeValueType>(
std::floor((fixedSize[i] - m_FixedBlockRadius[i] - 1) * fixedSpacing[i] / spacing[i]));
}
region.SetSize(size);
outputPtr->SetLargestPossibleRegion(region);
}
template <typename TFixedImage, typename TMovingImage>
void
SearchRegionImageInitializer<TFixedImage, TMovingImage>::DynamicThreadedGenerateData(
const OutputRegionType & outputRegion)
{
OutputImageType * outputPtr = this->GetOutput();
if (!outputPtr)
{
return;
}
OutputRegionType region;
OutputRegionType movingLargestRegion = m_MovingImage->GetLargestPossibleRegion();
typename MovingImageType::PointType point;
typename MovingImageType::IndexType index;
typename MovingImageType::SizeType unitySize;
unitySize.Fill(1);
ImageRegionIteratorWithIndex<OutputImageType> it(outputPtr, outputRegion);
for (it.GoToBegin(); !it.IsAtEnd(); ++it)
{
index = it.GetIndex();
outputPtr->TransformIndexToPhysicalPoint(index, point);
m_MovingImage->TransformPhysicalPointToIndex(point, index);
region.SetIndex(index);
region.SetSize(unitySize);
region.PadByRadius(m_SearchRegionRadius);
if (!region.Crop(movingLargestRegion))
{
itkExceptionMacro(<< "The all of the fixed image must overlap with the moving image for this initializer.");
}
it.Set(region);
}
}
} // end namespace BlockMatching
} // end namespace itk
#endif