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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 itkConstantPadImageFilter_h
#define itkConstantPadImageFilter_h
#include "itkPadImageFilter.h"
#include "itkMath.h"
#include "itkConstantBoundaryCondition.h"
namespace itk
{
/** \class ConstantPadImageFilter
* \brief Increase the image size by padding with a constant value.
*
* ConstantPadImageFilter changes the output image region. If the output
* image region is larger than the input image region, the extra pixels are
* filled in by a constant value. The output image region must be specified.
*
* \image html PadImageFilter.png "Visual explanation of padding regions."
*
* This filter is implemented as a multithreaded filter. It provides a
* ThreadedGenerateData() method for its implementation.
*
* \ingroup GeometricTransform
* \sa WrapPadImageFilter, MirrorPadImageFilter
* \ingroup ITKImageGrid
*
* \wiki
* \wikiexample{Images/ConstantPadImageFilter,Pad an image with a constant value}
* \endwiki
*/
template< typename TInputImage, typename TOutputImage >
class ITK_TEMPLATE_EXPORT ConstantPadImageFilter:
public PadImageFilter< TInputImage, TOutputImage >
{
public:
/** Standard class typedefs. */
typedef ConstantPadImageFilter 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(ConstantPadImageFilter, PadImageFilter);
/** Typedef to describe the output image region type. */
typedef typename Superclass::OutputImageRegionType OutputImageRegionType;
typedef typename Superclass::InputImageRegionType InputImageRegionType;
/** 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;
/** ImageDimension constants */
itkStaticConstMacro(ImageDimension, unsigned int,
TInputImage::ImageDimension);
itkStaticConstMacro(OutputImageDimension, unsigned int,
TOutputImage::ImageDimension);
/** Set/Get the pad value. Default is Zero. */
void SetConstant( OutputImagePixelType constant )
{
if ( Math::NotExactlyEquals(constant, m_InternalBoundaryCondition.GetConstant()) )
{
m_InternalBoundaryCondition.SetConstant( constant );
this->Modified();
}
}
OutputImagePixelType GetConstant() const
{
return m_InternalBoundaryCondition.GetConstant();
}
#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:
ConstantPadImageFilter();
~ConstantPadImageFilter() ITK_OVERRIDE {}
void PrintSelf(std::ostream & os, Indent indent) const ITK_OVERRIDE;
private:
ITK_DISALLOW_COPY_AND_ASSIGN(ConstantPadImageFilter);
ConstantBoundaryCondition< TInputImage, TOutputImage > m_InternalBoundaryCondition;
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkConstantPadImageFilter.hxx"
#endif
#endif
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