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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: itkRobustAutomaticThresholdImageFilter.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 __itkRobustAutomaticThresholdImageFilter_h
#define __itkRobustAutomaticThresholdImageFilter_h
#include "itkImageToImageFilter.h"
#include "itkRobustAutomaticThresholdCalculator.h"
namespace itk {
/** \class RobustAutomaticThresholdImageFilter
* \brief Threshold an image using robust automatic threshold selection (RATS) method.
*
* RobustAutomaticThresholdImageFilter takes two inputs: the image to be thresholded
* and a image of gradient magnitude of that image.
* The threshold is computed as the mean of the pixel values in the input image weighted
* by the pixel values in the gradient image.
* The threshold computed that way should be the mean pixel value where the intensity
* change the most.
*
* http://hdl.handle.net/1926/370
*
* \author Gaetan Lehmann. Biologie du Developpement et de la Reproduction, INRA de Jouy-en-Josas, France.
*
* \ingroup IntensityImageFilters
*/
template<class TInputImage, class TGradientImage=TInputImage, class TOutputImage=TInputImage>
class ITK_EXPORT RobustAutomaticThresholdImageFilter :
public ImageToImageFilter<TInputImage, TOutputImage>
{
public:
/** Standard Self typedef */
typedef RobustAutomaticThresholdImageFilter 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(RobustAutomaticThresholdImageFilter, ImageToImageFilter);
/** Standard image type within this class. */
typedef TInputImage InputImageType;
typedef TGradientImage GradientImageType;
/** Image pixel value typedef. */
typedef typename TInputImage::PixelType InputPixelType;
typedef typename TOutputImage::PixelType OutputPixelType;
typedef typename TGradientImage::PixelType GradientPixelType;
/** Image related typedefs. */
typedef typename TInputImage::Pointer InputImagePointer;
typedef typename TOutputImage::Pointer OutputImagePointer;
typedef typename TGradientImage::Pointer GradientImagePointer;
typedef typename TInputImage::SizeType InputSizeType;
typedef typename TInputImage::IndexType InputIndexType;
typedef typename TInputImage::RegionType InputImageRegionType;
typedef typename TOutputImage::SizeType OutputSizeType;
typedef typename TOutputImage::IndexType OutputIndexType;
typedef typename TOutputImage::RegionType OutputImageRegionType;
typedef RobustAutomaticThresholdCalculator< TInputImage, TGradientImage >
CalculatorType;
/** Image related typedefs. */
itkStaticConstMacro(InputImageDimension, unsigned int,
TInputImage::ImageDimension );
itkStaticConstMacro(OutputImageDimension, unsigned int,
TOutputImage::ImageDimension );
/** Set the "outside" pixel value. The default value
* NumericTraits<OutputPixelType>::Zero. */
itkSetMacro(OutsideValue,OutputPixelType);
/** Get the "outside" pixel value. */
itkGetConstMacro(OutsideValue,OutputPixelType);
/** Set the "inside" pixel value. The default value
* NumericTraits<OutputPixelType>::max() */
itkSetMacro(InsideValue,OutputPixelType);
/** Get the "inside" pixel value. */
itkGetConstMacro(InsideValue,OutputPixelType);
/** Get the computed threshold. */
itkGetConstMacro(Threshold,InputPixelType);
itkSetMacro(Pow, double);
itkGetConstMacro(Pow, double);
#ifdef ITK_USE_CONCEPT_CHECKING
/** Begin concept checking */
itkConceptMacro(OutputComparableCheck,
(Concept::Comparable<OutputPixelType>));
itkConceptMacro(OutputOStreamWritableCheck,
(Concept::OStreamWritable<OutputPixelType>));
/** End concept checking */
#endif
/** Set the gradient image */
void SetGradientImage(GradientImageType *input)
{
// Process object is not const-correct so the const casting is required.
this->SetNthInput( 1, const_cast<GradientImageType *>(input) );
}
/** Get the gradient image */
GradientImageType * GetGradientImage()
{
return static_cast<GradientImageType*>(const_cast<DataObject *>(this->ProcessObject::GetInput(1)));
}
/** Set the input image */
void SetInput1(TInputImage *input)
{
this->SetInput( input );
}
/** Set the gradient image */
void SetInput2(GradientImageType *input)
{
this->SetGradientImage( input );
}
protected:
RobustAutomaticThresholdImageFilter();
~RobustAutomaticThresholdImageFilter(){};
void PrintSelf(std::ostream& os, Indent indent) const;
void GenerateInputRequestedRegion();
void GenerateData ();
private:
RobustAutomaticThresholdImageFilter(const Self&); //purposely not implemented
void operator=(const Self&); //purposely not implemented
double m_Pow;
InputPixelType m_Threshold;
OutputPixelType m_InsideValue;
OutputPixelType m_OutsideValue;
}; // end of class
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkRobustAutomaticThresholdImageFilter.txx"
#endif
#endif
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