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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkThresholdImageFilter.h,v $
Language: C++
Date: $Date: 2007-10-05 10:31:58 $
Version: $Revision: 1.22 $
Copyright (c) Insight Software Consortium. All rights reserved.
See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
Portions of this code are covered under the VTK copyright.
See VTKCopyright.txt or http://www.kitware.com/VTKCopyright.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 __itkThresholdImageFilter_h
#define __itkThresholdImageFilter_h
#include "itkInPlaceImageFilter.h"
#include "itkConceptChecking.h"
namespace itk
{
/** \class ThresholdImageFilter
* \brief Set image values to a user-specified value if they are below,
* above, or between simple threshold values.
*
* ThresholdImageFilter sets image values to a user-specified "outside"
* value (by default, "black") if the image values are below, above, or
* between simple threshold values.
*
* The pixels must support the operators >= and <=.
*
* \ingroup IntensityImageFilters Multithreaded
*/
template <class TImage>
class ITK_EXPORT ThresholdImageFilter : public InPlaceImageFilter<TImage,TImage>
{
public:
/** Standard class typedefs. */
typedef ThresholdImageFilter Self;
typedef InPlaceImageFilter<TImage,TImage> 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(ThresholdImageFilter, InPlaceImageFilter);
/** Typedef to describe the type of pixel. */
typedef typename TImage::PixelType PixelType;
/** The pixel type must support comparison operators. */
#ifdef ITK_USE_CONCEPT_CHECKING
/** Begin concept checking */
itkConceptMacro(PixelTypeComparableCheck,
(Concept::Comparable<PixelType>));
itkConceptMacro(PixelTypeOStreamWritableCheck,
(Concept::OStreamWritable<PixelType>));
/** End concept checking */
#endif
/** Set the "outside" pixel value. The default value
* NumericTraits<PixelType>::Zero. */
itkSetMacro(OutsideValue,PixelType);
/** Get the "outside" pixel value. */
itkGetMacro(OutsideValue,PixelType);
/** The values greater than or equal to the value are set to OutsideValue. */
void ThresholdAbove(const PixelType &thresh);
/** The values less than or equal to the value are set to OutsideValue. */
void ThresholdBelow(const PixelType &thresh);
/** The values outside the range are set to OutsideValue. */
void ThresholdOutside(const PixelType &lower, const PixelType &upper);
/** Set/Get methods to set the lower threshold */
itkSetMacro(Lower, PixelType);
itkGetMacro(Lower, PixelType);
/** Set/Get methods to set the upper threshold */
itkSetMacro(Upper, PixelType);
itkGetMacro(Upper, PixelType);
/** Some additional typedefs. */
typedef TImage InputImageType;
typedef typename InputImageType::ConstPointer InputImagePointer;
typedef typename InputImageType::RegionType InputImageRegionType;
typedef typename InputImageType::PixelType InputImagePixelType;
/** Some additional typedefs. */
typedef TImage OutputImageType;
typedef typename OutputImageType::Pointer OutputImagePointer;
typedef typename OutputImageType::RegionType OutputImageRegionType;
typedef typename OutputImageType::PixelType OutputImagePixelType;
protected:
ThresholdImageFilter();
~ThresholdImageFilter() {};
void PrintSelf(std::ostream& os, Indent indent) const;
/** ThresholdImageFilter can be implemented as a multithreaded filter.
* Therefore, this implementation provides a ThreadedGenerateData() routine
* which is called for each processing thread. The output image data is
* allocated automatically by the superclass prior to calling
* ThreadedGenerateData(). ThreadedGenerateData can only write to the
* portion of the output image specified by the parameter
* "outputRegionForThread"
*
* \sa ImageToImageFilter::ThreadedGenerateData(),
* ImageToImageFilter::GenerateData() */
void ThreadedGenerateData(const OutputImageRegionType& outputRegionForThread,
int threadId );
private:
ThresholdImageFilter(const Self&); //purposely not implemented
void operator=(const Self&); //purposely not implemented
PixelType m_OutsideValue;
PixelType m_Lower;
PixelType m_Upper;
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkThresholdImageFilter.txx"
#endif
#endif
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