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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 itkConvolutionImageFilterBase_h
#define itkConvolutionImageFilterBase_h
#include "itkImageToImageFilter.h"
#include "itkZeroFluxNeumannBoundaryCondition.h"
namespace itk
{
/** \class ConvolutionImageFilterBase
* \brief Abstract base class for the convolution image filters.
*
* \ingroup ITKConvolution
* \sa ConvolutionImageFilter FFTConvolutionImageFilter
*/
template< typename TInputImage,
typename TKernelImage = TInputImage,
typename TOutputImage = TInputImage >
class ITK_TEMPLATE_EXPORT ConvolutionImageFilterBase :
public ImageToImageFilter< TInputImage, TOutputImage >
{
public:
typedef ConvolutionImageFilterBase Self;
typedef ImageToImageFilter< TInputImage, TOutputImage > Superclass;
typedef SmartPointer< Self > Pointer;
typedef SmartPointer< const Self > ConstPointer;
/** Run-time type information ( and related methods ) */
itkTypeMacro(ConvolutionImageFilterBase, ImageToImageFilter);
/** Dimensionality of input and output data is assumed to be the same. */
itkStaticConstMacro(ImageDimension, unsigned int,
TInputImage::ImageDimension);
typedef TInputImage InputImageType;
typedef TOutputImage OutputImageType;
typedef TKernelImage KernelImageType;
typedef typename InputImageType::PixelType InputPixelType;
typedef typename OutputImageType::PixelType OutputPixelType;
typedef typename KernelImageType::PixelType KernelPixelType;
typedef typename InputImageType::IndexType InputIndexType;
typedef typename OutputImageType::IndexType OutputIndexType;
typedef typename KernelImageType::IndexType KernelIndexType;
typedef typename InputImageType::SizeType InputSizeType;
typedef typename OutputImageType::SizeType OutputSizeType;
typedef typename KernelImageType::SizeType KernelSizeType;
typedef typename InputSizeType::SizeValueType SizeValueType;
typedef typename InputImageType::RegionType InputRegionType;
typedef typename OutputImageType::RegionType OutputRegionType;
typedef typename KernelImageType::RegionType KernelRegionType;
/** Typedef to describe the boundary condition. */
typedef ImageBoundaryCondition< TInputImage > BoundaryConditionType;
typedef BoundaryConditionType * BoundaryConditionPointerType;
typedef ZeroFluxNeumannBoundaryCondition< TInputImage > DefaultBoundaryConditionType;
/** Set/get the boundary condition. */
itkSetMacro(BoundaryCondition, BoundaryConditionPointerType);
itkGetConstMacro(BoundaryCondition, BoundaryConditionPointerType);
/** Set/get the image kernel. */
itkSetInputMacro(KernelImage, KernelImageType);
itkGetInputMacro(KernelImage, KernelImageType);
/** Normalize the output image by the sum of the kernel
* components. Defaults to off. */
itkSetMacro(Normalize, bool);
itkGetConstMacro(Normalize, bool);
itkBooleanMacro(Normalize);
typedef enum
{
SAME = 0,
VALID
} OutputRegionModeType;
/** Sets the output region mode. If set to SAME, the output region
* will be the same as the input region, and regions of the image
* near the boundaries will contain contributions from outside the
* input image as determined by the boundary condition set in
* SetBoundaryCondition(). If set to VALID, the output region
* consists of pixels computed only from pixels in the input image
* (no extrapolated contributions from the boundary condition are
* needed). The output is therefore smaller than the input
* region. Default output region mode is SAME. */
itkSetEnumMacro(OutputRegionMode, OutputRegionModeType);
itkGetEnumMacro(OutputRegionMode, OutputRegionModeType);
virtual void SetOutputRegionModeToSame();
virtual void SetOutputRegionModeToValid();
protected:
ConvolutionImageFilterBase();
~ConvolutionImageFilterBase() ITK_OVERRIDE {}
void PrintSelf(std::ostream & os, Indent indent) const ITK_OVERRIDE;
/** The largest possible output region may differ from the largest
* possible input region. */
void GenerateOutputInformation() ITK_OVERRIDE;
/** Get the valid region of the convolution. */
OutputRegionType GetValidRegion() const;
/** Default superclass implementation ensures that input images
* occupy same physical space. This is not needed for this filter. */
virtual void VerifyInputInformation() ITK_OVERRIDE {};
private:
ITK_DISALLOW_COPY_AND_ASSIGN(ConvolutionImageFilterBase);
bool m_Normalize;
DefaultBoundaryConditionType m_DefaultBoundaryCondition;
BoundaryConditionPointerType m_BoundaryCondition;
OutputRegionModeType m_OutputRegionMode;
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkConvolutionImageFilterBase.hxx"
#endif
#endif
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