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/*=========================================================================
*
* Copyright Insight Software Consortium
*
* 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
*
* http://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 sitkImageConvert_h
#define sitkImageConvert_h
namespace itk
{
template< typename T, unsigned int NVectorDimension > class Vector;
namespace simple
{
/** \brief A utility method to help convert between itk image types efficiently.
*
*/
template< typename TPixelType, unsigned int ImageDimension >
SITKCommon_HIDDEN
typename itk::Image< itk::Vector< TPixelType, ImageDimension >, ImageDimension>::Pointer
GetImageFromVectorImage( itk::VectorImage< TPixelType, ImageDimension > *img, bool transferOwnership = false )
{
typedef itk::Image< itk::Vector< TPixelType, ImageDimension >, ImageDimension> ImageType;
typedef itk::VectorImage< TPixelType, ImageDimension > VectorImageType;
// check number of element compatibility
if ( img->GetNumberOfComponentsPerPixel() != VectorImageType::ImageDimension )
{
sitkExceptionMacro("Expected number of elements in vector image to be the same as the dimension!");
}
size_t numberOfElements = img->GetBufferedRegion().GetNumberOfPixels();
typename ImageType::PixelType* buffer = reinterpret_cast<typename ImageType::PixelType*>( img->GetPixelContainer()->GetBufferPointer() );
if (!img->GetPixelContainer()->GetContainerManageMemory())
{
transferOwnership=false;
}
typename ImageType::Pointer out = ImageType::New();
out->CopyInformation( img );
out->SetRegions( img->GetBufferedRegion() );
// Set the image's pixel container to import the pointer provided.
out->GetPixelContainer()->SetImportPointer(buffer, numberOfElements, transferOwnership );
img->GetPixelContainer()->SetContainerManageMemory(!transferOwnership);
return out;
}
template< class TPixelType, unsigned int NImageDimension, unsigned int NLength >
SITKCommon_HIDDEN
typename itk::VectorImage< TPixelType, NImageDimension >::Pointer
GetVectorImageFromImage( itk::Image< itk::Vector< TPixelType, NLength >, NImageDimension> *img, bool transferOwnership = false )
{
typedef itk::VectorImage< TPixelType, NImageDimension > VectorImageType;
size_t numberOfElements = img->GetBufferedRegion().GetNumberOfPixels();
typename VectorImageType::InternalPixelType* buffer = reinterpret_cast<typename VectorImageType::InternalPixelType*>( img->GetPixelContainer()->GetBufferPointer() );
// Unlike an image of Vectors a VectorImage's container is a
// container of TPixelType, whos size is the image's number of
// pixels * number of pixels per component
numberOfElements *= NImageDimension;
if (!img->GetPixelContainer()->GetContainerManageMemory())
{
transferOwnership=false;
}
typename VectorImageType::Pointer out = VectorImageType::New();
// Set the image's pixel container to import the pointer provided.
out->GetPixelContainer()->SetImportPointer(buffer, numberOfElements, transferOwnership );
img->GetPixelContainer()->SetContainerManageMemory(!transferOwnership);
out->CopyInformation( img );
out->SetRegions( img->GetBufferedRegion() );
return out;
}
template< class TPixelType, unsigned int NImageDimension >
SITKCommon_HIDDEN
typename itk::VectorImage< TPixelType, NImageDimension >::Pointer
GetVectorImageFromImage( itk::Image< itk::Vector< TPixelType, NImageDimension >, NImageDimension> *img, bool transferOwnership = false )
{
return GetVectorImageFromImage<TPixelType,NImageDimension,NImageDimension>(img, transferOwnership);
}
}
}
#endif // sitkImageConvert_h
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