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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 itkComposeImageFilter_h
#define itkComposeImageFilter_h
#include "itkImageToImageFilter.h"
#include "itkVectorImage.h"
#include "itkImageRegionConstIterator.h"
#include <vector>
namespace itk
{
/**
* \class ComposeImageFilter
* \brief ComposeImageFilter combine several scalar images into a multicomponent image
*
* ComposeImageFilter combine several scalar images into an itk::Image of
* vector pixel (itk::Vector, itk::RGBPixel, ...), of std::complex pixel,
* or in an itk::VectorImage.
*
* \par Inputs and Usage
\code
filter->SetInput( 0, image0 );
filter->SetInput( 1, image1 );
...
filter->Update();
itk::VectorImage< PixelType, dimension >::Pointer = filter->GetOutput();
\endcode
* All input images are expected to have the same template parameters and have
* the same size and origin.
*
* \sa VectorImage
* \sa VectorIndexSelectionCastImageFilter
* \ingroup ITKImageCompose
*
* \sphinx
* \sphinxexample{Filtering/ImageCompose/CreateVectorImageFromScalarImages,Create Vector Image From Scalar Images}
* \sphinxexample{Filtering/ImageCompose/ComposeVectorFromThreeScalarImages,Compose Vector From Three Scalar Images}
* \sphinxexample{Filtering/ImageCompose/ConvertRealAndImaginaryToComplexImage,Convert Real And Imaginary Images To
Complex Image}
* \endsphinx
*/
template <typename TInputImage,
typename TOutputImage = VectorImage<typename TInputImage::PixelType, TInputImage::ImageDimension>>
class ITK_TEMPLATE_EXPORT ComposeImageFilter : public ImageToImageFilter<TInputImage, TOutputImage>
{
public:
ITK_DISALLOW_COPY_AND_MOVE(ComposeImageFilter);
using Self = ComposeImageFilter;
using Pointer = SmartPointer<Self>;
using ConstPointer = SmartPointer<const Self>;
using Superclass = ImageToImageFilter<TInputImage, TOutputImage>;
itkNewMacro(Self);
itkOverrideGetNameOfClassMacro(ComposeImageFilter);
static constexpr unsigned int Dimension = TInputImage::ImageDimension;
using InputImageType = TInputImage;
using OutputImageType = TOutputImage;
using InputPixelType = typename InputImageType::PixelType;
using OutputPixelType = typename OutputImageType::PixelType;
using RegionType = typename InputImageType::RegionType;
void
SetInput1(const InputImageType * image1);
void
SetInput2(const InputImageType * image2);
void
SetInput3(const InputImageType * image3);
#ifdef ITK_USE_CONCEPT_CHECKING
// Begin concept checking
itkConceptMacro(InputCovertibleToOutputCheck,
(Concept::Convertible<InputPixelType, typename NumericTraits<OutputPixelType>::ValueType>));
// End concept checking
#endif
protected:
ComposeImageFilter();
void
GenerateOutputInformation() override;
void
BeforeThreadedGenerateData() override;
void
DynamicThreadedGenerateData(const RegionType & outputRegionForThread) override;
private:
// we have to specialize the code for complex, because it provides no operator[]
// method
using InputIteratorType = ImageRegionConstIterator<InputImageType>;
using InputIteratorContainerType = std::vector<InputIteratorType>;
template <typename T>
void
ComputeOutputPixel(std::complex<T> & pix, InputIteratorContainerType & inputItContainer)
{
pix = std::complex<T>(inputItContainer[0].Get(), inputItContainer[1].Get());
++(inputItContainer[0]);
++(inputItContainer[1]);
}
template <typename TPixel>
void
ComputeOutputPixel(TPixel & pix, InputIteratorContainerType & inputItContainer)
{
for (unsigned int i = 0; i < this->GetNumberOfInputs(); ++i)
{
pix[i] = static_cast<typename NumericTraits<OutputPixelType>::ValueType>(inputItContainer[i].Get());
++(inputItContainer[i]);
}
}
};
} // namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
# include "itkComposeImageFilter.hxx"
#endif
#endif
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