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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 __itkPadImageFilter_h
#define __itkPadImageFilter_h
#include "itkImageToImageFilter.h"
#include "itkImageBoundaryCondition.h"
namespace itk
{
/** \class PadImageFilter
* \brief Increase the image size by padding. Superclass for filters that fill
* in extra pixels.
*
*
* \image html PadImageFilter.png "Visual explanation of padding regions."
*
* PadImageFilter changes the image boundary of an image by padding each
* dimension with subclass defined algorithms. The number of pixels to pad
* for the upper and lower bounds of each dimension must be specified.
*
* This filter is implemented as a multithreaded filter. It provides a
* ThreadedGenerateData() method for its implementation.
*
* \ingroup GeometricTransform
* \sa WrapPadImageFilter, MirrorPadImageFilter, ConstantPadImageFilter
*
* \ingroup ITKImageGrid
*/
template< typename TInputImage, typename TOutputImage >
class PadImageFilter:
public ImageToImageFilter< TInputImage, TOutputImage >
{
public:
/** Standard class typedefs. */
typedef PadImageFilter Self;
typedef ImageToImageFilter< TInputImage, TOutputImage > Superclass;
typedef SmartPointer< Self > Pointer;
typedef SmartPointer< const Self > ConstPointer;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** Typedef to describe the output and input image region types. */
typedef typename TOutputImage::RegionType OutputImageRegionType;
typedef typename TInputImage::RegionType InputImageRegionType;
/** Typedef to describe the type of pixel. */
typedef typename TOutputImage::PixelType OutputImagePixelType;
typedef typename TInputImage::PixelType InputImagePixelType;
/** Typedef to describe the output and input image index and size types. */
typedef typename TOutputImage::IndexType OutputImageIndexType;
typedef typename TInputImage::IndexType InputImageIndexType;
typedef typename TOutputImage::SizeType OutputImageSizeType;
typedef typename TInputImage::SizeType InputImageSizeType;
typedef typename TInputImage::SizeType SizeType;
typedef typename TInputImage::SizeValueType SizeValueType;
/** Typedef to describe the boundary condition. */
typedef ImageBoundaryCondition< TInputImage, TOutputImage > BoundaryConditionType;
typedef BoundaryConditionType * BoundaryConditionPointerType;
/** Run-time type information (and related methods). */
itkTypeMacro(PadImageFilter, ImageToImageFilter);
/** ImageDimension enumeration. */
itkStaticConstMacro(ImageDimension, unsigned int,
TInputImage::ImageDimension);
/** Set/Get the output image padding. Default is no padding
* (same as input). */
itkSetMacro(PadLowerBound, SizeType);
itkSetMacro(PadUpperBound, SizeType);
itkGetConstReferenceMacro(PadLowerBound, SizeType);
itkGetConstReferenceMacro(PadUpperBound, SizeType);
itkSetVectorMacro(PadLowerBound, const SizeValueType, ImageDimension);
itkSetVectorMacro(PadUpperBound, const SizeValueType, ImageDimension);
void SetPadBound(const InputImageSizeType & bound)
{
this->SetPadLowerBound(bound);
this->SetPadUpperBound(bound);
}
/** Set/get the boundary condition. */
itkSetMacro(BoundaryCondition, BoundaryConditionPointerType);
itkGetConstMacro(BoundaryCondition, BoundaryConditionPointerType);
protected:
PadImageFilter();
~PadImageFilter() {}
void PrintSelf(std::ostream & os, Indent indent) const;
/** PadImageFilter produces an image which is a different resolution
* than its input image. As such, PadImageFilter needs to
* provide an implementation for GenerateOutputInformation() in order
* to inform the pipeline execution model. The original
* documentation of this method is below.
* \sa ProcessObject::GenerateOutputInformaton() */
virtual void GenerateOutputInformation();
/** PadImageFilter needs a smaller input requested region than
* output requested region. As such, PadImageFilter needs to
* provide an implementation for GenerateInputRequestedRegion() in
* order to inform the pipeline execution model.
* \sa ProcessObject::GenerateInputRequestedRegion() */
virtual void GenerateInputRequestedRegion();
/** This class can be multithreaded. */
void ThreadedGenerateData(const OutputImageRegionType & outputRegionForThread,
ThreadIdType threadId);
/** Method for subclasses to set the boundary condition. */
void InternalSetBoundaryCondition( const BoundaryConditionPointerType boundaryCondition );
private:
PadImageFilter(const Self &); //purposely not implemented
void operator=(const Self &); //purposely not implemented
SizeType m_PadLowerBound;
SizeType m_PadUpperBound;
BoundaryConditionPointerType m_BoundaryCondition;
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkPadImageFilter.hxx"
#endif
#endif
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