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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: itkNormalizeImageFilter.h
Language: C++
Date: $Date$
Version: $Revision$
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 __itkNormalizeImageFilter_h
#define __itkNormalizeImageFilter_h
#include "itkImageToImageFilter.h"
#include "itkStatisticsImageFilter.h"
#include "itkShiftScaleImageFilter.h"
#include "itkEventObject.h"
namespace itk {
/** \class NormalizeImageFilter
* \brief Normalize an image by setting its mean to zero and variance to one.
*
* NormalizeImageFilter shifts and scales an image so that the pixels
* in the image have a zero mean and unit variance. This filter uses
* StatisticsImageFilter to compute the mean and variance of the input
* and then applies ShiftScaleImageFilter to shift and scale the pixels.
*
* NB: since this filter normalizes the data to lie within -1 to 1,
* integral types will produce an image that DOES NOT HAVE a unit variance.
* \ingroup MathematicalImageFilters
*/
template<class TInputImage,class TOutputImage>
class ITK_EXPORT NormalizeImageFilter :
public ImageToImageFilter<TInputImage, TOutputImage>
{
public:
/** Standard Self typedef */
typedef NormalizeImageFilter Self;
typedef ImageToImageFilter<TInputImage,TOutputImage> Superclass;
typedef SmartPointer<Self> Pointer;
typedef SmartPointer<const Self> ConstPointer;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** Runtime information support. */
itkTypeMacro(NormalizeImageFilter, ImageToImageFilter);
/** Image related typedefs. */
typedef typename TInputImage::Pointer InputImagePointer;
typedef typename TOutputImage::Pointer OutputImagePointer;
/** NormalizeImageFilter must call modified on its internal filters */
virtual void Modified() const;
protected:
NormalizeImageFilter();
/** GenerateData. */
void GenerateData ();
// Override since the filter needs all the data for the algorithm
void GenerateInputRequestedRegion();
private:
NormalizeImageFilter(const Self&); //purposely not implemented
void operator=(const Self&); //purposely not implemented
typename StatisticsImageFilter<TInputImage>::Pointer m_StatisticsFilter;
typename ShiftScaleImageFilter<TInputImage,TOutputImage>::Pointer m_ShiftScaleFilter;
}; // end of class
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkNormalizeImageFilter.txx"
#endif
#endif
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