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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.
*
*=========================================================================*/
/*=========================================================================
*
* Portions of this file are subject to the VTK Toolkit Version 3 copyright.
*
* Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
*
* For complete copyright, license and disclaimer of warranty information
* please refer to the NOTICE file at the top of the ITK source tree.
*
*=========================================================================*/
#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 available methods are:
*
* ThresholdAbove():
* The values greater than the threshold value are set to OutsideValue
*
* ThresholdBelow():
* The values less than the threshold value are set to OutsideValue
*
* ThresholdOutside():
* The values outside the threshold range (less than lower or greater
* than upper) are set to OutsideValue
*
* Note that these definitions indicate that pixels equal to the threshold
* value are not set to OutsideValue in any of these methods
*
* The pixels must support the operators >= and <=.
*
* \ingroup IntensityImageFilters MultiThreaded
* \ingroup ITKThresholding
*
* \wiki
* \wikiexample{ImageProcessing/ThresholdImageFilter,Threshold an image}
* \endwiki
*/
template< typename TImage >
class ITK_TEMPLATE_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>::ZeroValue(). */
itkSetMacro(OutsideValue, PixelType);
/** Get the "outside" pixel value. */
itkGetConstMacro(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);
itkGetConstMacro(Lower, PixelType);
/** Set/Get methods to set the upper threshold. */
itkSetMacro(Upper, PixelType);
itkGetConstMacro(Upper, PixelType);
/** Additional typedefs for the input image. */
typedef TImage InputImageType;
typedef typename InputImageType::ConstPointer InputImagePointer;
typedef typename InputImageType::RegionType InputImageRegionType;
typedef typename InputImageType::PixelType InputImagePixelType;
/** Additional typedefs for the output image. */
typedef TImage OutputImageType;
typedef typename OutputImageType::Pointer OutputImagePointer;
typedef typename OutputImageType::RegionType OutputImageRegionType;
typedef typename OutputImageType::PixelType OutputImagePixelType;
protected:
ThresholdImageFilter();
~ThresholdImageFilter() ITK_OVERRIDE {}
void PrintSelf(std::ostream & os, Indent indent) const ITK_OVERRIDE;
/** 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,
ThreadIdType threadId) ITK_OVERRIDE;
private:
ITK_DISALLOW_COPY_AND_ASSIGN(ThresholdImageFilter);
PixelType m_OutsideValue;
PixelType m_Lower;
PixelType m_Upper;
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkThresholdImageFilter.hxx"
#endif
#endif
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