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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 itkRecursiveMultiResolutionPyramidImageFilter_h
#define itkRecursiveMultiResolutionPyramidImageFilter_h
#include "itkMultiResolutionPyramidImageFilter.h"
#include "vnl/vnl_matrix.h"
namespace itk
{
/** \class RecursiveMultiResolutionPyramidImageFilter
* \brief Creates a multi-resolution pyramid using a recursive implementation.
*
* RecursiveMultiResolutionPyramidImageFilter creates an image pyramid
* according to a user defined multi-resolution schedule.
*
* If a schedule is downward divisible, a fast recursive implementation is
* used to generate the output images. If the schedule is not downward
* divisible the superclass (MultiResolutionPyramidImageFilter)
* implementation is used instead. A schedule is downward divisible if at
* every level, the shrink factors are divisible by the shrink factors at the
* next level for the same dimension.
*
* See documentation of MultiResolutionPyramidImageFilter
* for information on how to specify a multi-resolution schedule.
*
* Note that unlike the MultiResolutionPyramidImageFilter,
* RecursiveMultiResolutionPyramidImageFilter will not smooth the output at
* the finest level if the shrink factors are all one and the schedule
* is downward divisible.
*
* This class is templated over the input image type and the output image type.
*
* This filter uses multithreaded filters to perform the smoothing and
* downsampling.
*
* This filter supports streaming.
*
* \sa MultiResolutionPyramidImageFilter
*
* \ingroup PyramidImageFilter MultiThreaded Streamed
* \ingroup ITKRegistrationCommon
*
* \sphinx
* \sphinxexample{Registration/Common/MultiresolutionPyramidFromImage,Multiresolution Pyramid From Image}
* \endsphinx
*/
template <typename TInputImage, typename TOutputImage>
class ITK_TEMPLATE_EXPORT RecursiveMultiResolutionPyramidImageFilter
: public MultiResolutionPyramidImageFilter<TInputImage, TOutputImage>
{
public:
ITK_DISALLOW_COPY_AND_MOVE(RecursiveMultiResolutionPyramidImageFilter);
/** Standard class type aliases. */
using Self = RecursiveMultiResolutionPyramidImageFilter;
using Superclass = MultiResolutionPyramidImageFilter<TInputImage, TOutputImage>;
using Pointer = SmartPointer<Self>;
using ConstPointer = SmartPointer<const Self>;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** \see LightObject::GetNameOfClass() */
itkOverrideGetNameOfClassMacro(RecursiveMultiResolutionPyramidImageFilter);
/** ImageDimension enumeration. */
static constexpr unsigned int ImageDimension = Superclass::ImageDimension;
/** Inherit types from the superclass.. */
using typename Superclass::InputImageType;
using typename Superclass::OutputImageType;
using typename Superclass::InputImagePointer;
using typename Superclass::OutputImagePointer;
using typename Superclass::InputImageConstPointer;
/** Given one output whose requested region has been set,
* this method sets the requested region for the remaining
* output images.
* The original documentation of this method is below.
* \sa ProcessObject::GenerateOutputRequestedRegion(); */
void
GenerateOutputRequestedRegion(DataObject * ptr) override;
/** RecursiveMultiResolutionPyramidImageFilter requires a larger input
* requested region than the output requested regions to accommodate the
* shrinkage and smoothing operations. As such,
* MultiResolutionPyramidImageFilter needs to provide an implementation for
* GenerateInputRequestedRegion(). The original documentation of this
* method is below. \sa ProcessObject::GenerateInputRequestedRegion() */
void
GenerateInputRequestedRegion() override;
protected:
RecursiveMultiResolutionPyramidImageFilter();
~RecursiveMultiResolutionPyramidImageFilter() override = default;
/** Generate the output data. */
void
GenerateData() override;
};
} // namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
# include "itkRecursiveMultiResolutionPyramidImageFilter.hxx"
#endif
#endif
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