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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 itkMetaImageConverter_hxx
#define itkMetaImageConverter_hxx
#include "itkImageRegionIterator.h"
#include "itkImageRegionIteratorWithIndex.h"
#include "itkMath.h"
namespace itk
{
template <unsigned int VDimension, typename PixelType, typename TSpatialObjectType>
auto
MetaImageConverter<VDimension, PixelType, TSpatialObjectType>::CreateMetaObject() -> MetaObjectType *
{
return dynamic_cast<MetaObjectType *>(new ImageMetaObjectType);
}
template <unsigned int VDimension, typename PixelType, typename TSpatialObjectType>
const char *
MetaImageConverter<VDimension, PixelType, TSpatialObjectType>::GetMetaObjectSubType()
{
return "Image";
}
template <unsigned int VDimension, typename PixelType, typename TSpatialObjectType>
auto
MetaImageConverter<VDimension, PixelType, TSpatialObjectType>::AllocateImage(const ImageMetaObjectType * image) ->
typename ImageType::Pointer
{
auto rval = ImageType::New();
using SizeType = typename ImageType::SizeType;
using SpacingType = typename ImageType::SpacingType;
using RegionType = typename ImageType::RegionType;
SizeType size;
SpacingType spacing;
for (unsigned int i = 0; i < VDimension; ++i)
{
size[i] = image->DimSize()[i];
if (Math::ExactlyEquals(image->ElementSpacing()[i], typename SpacingType::ValueType{}))
{
spacing[i] = 1;
}
else
{
spacing[i] = image->ElementSpacing()[i];
}
}
const RegionType region(size);
rval->SetRegions(region);
rval->SetSpacing(spacing);
rval->Allocate();
return rval;
}
/** Convert a metaImage into an ImageMaskSpatialObject */
template <unsigned int VDimension, typename PixelType, typename TSpatialObjectType>
auto
MetaImageConverter<VDimension, PixelType, TSpatialObjectType>::MetaObjectToSpatialObject(const MetaObjectType * mo)
-> SpatialObjectPointer
{
const auto * imageMO = dynamic_cast<const ImageMetaObjectType *>(mo);
if (imageMO == nullptr)
{
itkExceptionMacro("Can't convert MetaObject to MetaImage");
}
ImageSpatialObjectPointer imageSO = ImageSpatialObjectType::New();
typename ImageType::Pointer myImage = this->AllocateImage(imageMO);
itk::ImageRegionIteratorWithIndex<ImageType> it(myImage, myImage->GetLargestPossibleRegion());
for (unsigned int i = 0; !it.IsAtEnd(); i++, ++it)
{
it.Set(static_cast<typename ImageType::PixelType>(imageMO->ElementData(i)));
}
imageSO->SetImage(myImage);
imageSO->SetId(imageMO->ID());
imageSO->SetParentId(imageMO->ParentID());
imageSO->GetProperty().SetName(imageMO->Name());
return imageSO.GetPointer();
}
/** Convert an Image SpatialObject into a metaImage */
template <unsigned int VDimension, typename PixelType, typename TSpatialObjectType>
auto
MetaImageConverter<VDimension, PixelType, TSpatialObjectType>::SpatialObjectToMetaObject(const SpatialObjectType * so)
-> MetaObjectType *
{
const ImageSpatialObjectConstPointer imageSO = dynamic_cast<const ImageSpatialObjectType *>(so);
if (imageSO.IsNull())
{
itkExceptionMacro("Can't downcast SpatialObject to ImageSpatialObject");
}
using ImageConstPointer = typename ImageType::ConstPointer;
ImageConstPointer SOImage = imageSO->GetImage();
float spacing[VDimension];
int size[VDimension];
for (unsigned int i = 0; i < VDimension; ++i)
{
size[i] = SOImage->GetLargestPossibleRegion().GetSize()[i];
spacing[i] = SOImage->GetSpacing()[i];
}
auto * imageMO = new MetaImage(VDimension, size, spacing, MET_GetPixelType(typeid(PixelType)));
itk::ImageRegionConstIterator<ImageType> it(SOImage, SOImage->GetLargestPossibleRegion());
for (unsigned int i = 0; !it.IsAtEnd(); i++, ++it)
{
imageMO->ElementData(i, it.Get());
}
imageMO->ID(imageSO->GetId());
imageMO->BinaryData(true);
imageMO->ElementDataFileName("LOCAL");
imageMO->ObjectSubTypeName(this->GetMetaObjectSubType());
if (this->GetWriteImagesInSeparateFile())
{
std::string filename = imageSO->GetProperty().GetName();
if (filename.empty())
{
std::cout << "Error: you should set the image name when using"
<< " WriteImagesInSeparateFile." << std::endl;
std::cout << "The image will be written locally." << std::endl;
}
else
{
filename += ".raw";
imageMO->ElementDataFileName(filename.c_str());
}
}
return imageMO;
}
} // end namespace itk
#endif
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