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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 itkZeroFluxNeumannPadImageFilter_h
#define itkZeroFluxNeumannPadImageFilter_h
#include "itkPadImageFilter.h"
#include "itkZeroFluxNeumannBoundaryCondition.h"
namespace itk
{
/** \class ZeroFluxNeumannPadImageFilter
* \brief Increase the image size by padding according to the
* zero-flux Neumann boundary condition.
*
* A filter which extends the image size and fill the missing pixels
* according to a Neumann boundary condition where first,
* upwind derivatives on the boundary are zero. This is a useful condition
* in solving some classes of differential equations.
*
* For example, invoking this filter on an image with a corner like:
* \code
* * * * * * * *
* * * * * * * *
* * * 1 2 3 4 5 (where * denotes pixels that lie
* * * 3 3 5 5 6 outside of the image boundary)
* * * 4 4 6 7 8
* \endcode
* returns the following padded image:
* \code
* 1 1 1 2 3 4 5
* 1 1 1 2 3 4 5
* 1 1 1 2 3 4 5
* 3 3 3 3 5 5 6 (note the corner values)
* 4 4 4 4 6 7 8
* \endcode
*
* \author Gaetan Lehmann. Biologie du Developpement et de la Reproduction, INRA de Jouy-en-Josas, France.
*
* \ingroup GeometricTransform
* \ingroup ITKImageGrid
* \sa WrapPadImageFilter, MirrorPadImageFilter, ConstantPadImageFilter, ZeroFluxNeumannBoundaryCondition
*/
template< typename TInputImage, typename TOutputImage >
class ITK_TEMPLATE_EXPORT ZeroFluxNeumannPadImageFilter :
public PadImageFilter< TInputImage, TOutputImage >
{
public:
/** Standard class typedefs. */
typedef ZeroFluxNeumannPadImageFilter Self;
typedef PadImageFilter<TInputImage, TOutputImage> Superclass;
typedef SmartPointer<Self> Pointer;
typedef SmartPointer<const Self> ConstPointer;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** Run-time type information (and related methods). */
itkTypeMacro(ZeroFluxNeumannPadImageFilter, PadImageFilter);
/** Typedef to describe the output image region type. */
typedef typename Superclass::OutputImageRegionType OutputImageRegionType;
typedef typename Superclass::InputImageRegionType InputImageRegionType;
typedef typename Superclass::InputImageRegionType RegionType;
/** Typedef to describe the type of pixel. */
typedef typename Superclass::OutputImagePixelType OutputImagePixelType;
typedef typename Superclass::InputImagePixelType InputImagePixelType;
/** Typedef to describe the output and input image index and size types. */
typedef typename Superclass::OutputImageIndexType OutputImageIndexType;
typedef typename Superclass::InputImageIndexType InputImageIndexType;
typedef typename Superclass::OutputImageSizeType OutputImageSizeType;
typedef typename Superclass::InputImageSizeType InputImageSizeType;
typedef typename Superclass::InputImageIndexType IndexType;
typedef typename Superclass::InputImageSizeType SizeType;
/** ImageDimension constants */
itkStaticConstMacro(ImageDimension, unsigned int,
TInputImage::ImageDimension);
itkStaticConstMacro(OutputImageDimension, unsigned int,
TOutputImage::ImageDimension);
#ifdef ITK_USE_CONCEPT_CHECKING
// Begin concept checking
itkConceptMacro(OutputEqualityComparableCheck,
(Concept::EqualityComparable< OutputImagePixelType >));
itkConceptMacro(InputConvertibleToOutputCheck,
(Concept::Convertible< InputImagePixelType, OutputImagePixelType >));
itkConceptMacro(SameDimensionCheck,
(Concept::SameDimension< ImageDimension, OutputImageDimension >));
itkConceptMacro(OutputOStreamWritableCheck,
(Concept::OStreamWritable< OutputImagePixelType >));
// End concept checking
#endif
protected:
ZeroFluxNeumannPadImageFilter();
~ZeroFluxNeumannPadImageFilter() ITK_OVERRIDE {};
private:
ITK_DISALLOW_COPY_AND_ASSIGN(ZeroFluxNeumannPadImageFilter);
ZeroFluxNeumannBoundaryCondition< TInputImage, TOutputImage > m_InternalBoundaryCondition;
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkZeroFluxNeumannPadImageFilter.hxx"
#endif
#endif
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