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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 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.
*
*
* This code was contributed in the Insight Journal paper:
* "Robust Automatic Threshold Selection"
* by Lehmann G.
* https://hdl.handle.net/1926/370
* http://www.insight-journal.org/browse/publication/134
*
*
* \author Gaetan Lehmann. Biologie du Developpement et de la Reproduction, INRA de Jouy-en-Josas, France.
*
* \ingroup IntensityImageFilters
* \ingroup ITKReview
*/
template< typename TInputImage, typename TGradientImage = TInputImage, typename TOutputImage = TInputImage >
class 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>::ZeroValue(). */
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 ITK_OVERRIDE;
void GenerateInputRequestedRegion() ITK_OVERRIDE;
void GenerateData() ITK_OVERRIDE;
private:
RobustAutomaticThresholdImageFilter(const Self &) ITK_DELETE_FUNCTION;
void operator=(const Self &) ITK_DELETE_FUNCTION;
double m_Pow;
InputPixelType m_Threshold;
OutputPixelType m_InsideValue;
OutputPixelType m_OutsideValue;
}; // end of class
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkRobustAutomaticThresholdImageFilter.hxx"
#endif
#endif
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