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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkBinomialBlurImageFilter.h,v $
Language: C++
Date: $Date: 2006-03-16 13:35:01 $
Version: $Revision: 1.15 $
Copyright (c) Insight Software Consortium. All rights reserved.
See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#ifndef __itkBinomialBlurImageFilter_h
#define __itkBinomialBlurImageFilter_h
#include "itkImageFunction.h"
#include "itkImageRegionIterator.h"
#include "itkImageToImageFilter.h"
#include "itkSize.h"
namespace itk
{
/** \class BinomialBlurImageFilter
* \brief Performs a separable blur on each dimension of an image
*
* The binomial blur consists of a nearest neighbor average along each
* image dimension. The net result after n-iterations approaches
* convultion with a gaussian.
*
* \ingroup ImageEnhancement
*/
template<class TInputImage, class TOutputImage>
class ITK_EXPORT BinomialBlurImageFilter :
public ImageToImageFilter<TInputImage, TOutputImage>
{
public:
/** Standard class typedefs. */
typedef BinomialBlurImageFilter Self;
typedef ImageToImageFilter<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( BinomialBlurImageFilter, ImageToImageFilter );
/** Number of dimensions */
itkStaticConstMacro(NDimensions, unsigned int, TInputImage::ImageDimension);
itkStaticConstMacro(NOutputDimensions, unsigned int, TOutputImage::ImageDimension);
/** typedef for images */
typedef TInputImage InputImageType;
typedef TOutputImage OutputImageType;
typedef typename OutputImageType::Pointer OutputImagePointer;
typedef typename InputImageType::Pointer InputImagePointer;
typedef typename InputImageType::ConstPointer InputImageConstPointer;
/** Image size typedef */
typedef Size<itkGetStaticConstMacro(NDimensions)> SizeType;
/** Image index typedef */
typedef typename TOutputImage::IndexType IndexType;
/** Image pixel value typedef */
typedef typename TOutputImage::PixelType PixelType;
/** Typedef to describe the output image region type. */
typedef typename TOutputImage::RegionType OutputImageRegionType;
/** Get and set the number of times to repeat the filter. */
itkSetMacro(Repetitions, unsigned int);
itkGetMacro(Repetitions, unsigned int);
/** This filter needs to request a larger input than its requested output.
* If this filter runs "Repetitions" iterations, then it needs an input
* that is 2*Repetitions larger than the output. In other words, this
* filter needs a border of "Repetitions" pixels. */
void GenerateInputRequestedRegion();
#ifdef ITK_USE_CONCEPT_CHECKING
/** Begin concept checking */
itkConceptMacro(SameDimensionCheck,
(Concept::SameDimension<itkGetStaticConstMacro(NDimensions),
itkGetStaticConstMacro(NOutputDimensions)>));
itkConceptMacro(InputConvertibleToDoubleCheck,
(Concept::Convertible<typename TInputImage::PixelType, double>));
itkConceptMacro(DoubleConvertibleToOutputCheck,
(Concept::Convertible<double, PixelType>));
/** End concept checking */
#endif
protected:
BinomialBlurImageFilter();
virtual ~BinomialBlurImageFilter() {};
void PrintSelf(std::ostream& os, Indent indent) const;
/** Method for evaluating the implicit function over the image. */
void GenerateData();
private:
BinomialBlurImageFilter(const Self&); //purposely not implemented
void operator=(const Self&); //purposely not implemented
/** How many times should we apply the blur? */
unsigned int m_Repetitions;
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkBinomialBlurImageFilter.txx"
#endif
#endif
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