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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 itkInvertIntensityImageFilter_h
#define itkInvertIntensityImageFilter_h
#include "itkUnaryFunctorImageFilter.h"
namespace itk
{
namespace Functor
{
/**
* \class InvertIntensityTransform
* \brief
* \ingroup ITKImageIntensity
*/
template< typename TInput, typename TOutput >
class ITK_TEMPLATE_EXPORT InvertIntensityTransform
{
public:
typedef typename NumericTraits< TInput >::RealType RealType;
InvertIntensityTransform() { m_Maximum = NumericTraits< TInput >::max(); }
~InvertIntensityTransform() {}
void SetMaximum(TOutput max) { m_Maximum = max; }
bool operator!=(const InvertIntensityTransform & other) const
{
if ( m_Maximum != other.m_Maximum )
{
return true;
}
return false;
}
bool operator==(const InvertIntensityTransform & other) const
{
return !( *this != other );
}
inline TOutput operator()(const TInput & x) const
{
TOutput result = static_cast< TOutput >( m_Maximum - x );
return result;
}
private:
TInput m_Maximum;
};
} // end namespace functor
/** \class InvertIntensityImageFilter
* \brief Invert the intensity of an image.
*
* InvertIntensityImageFilter inverts intensity of pixels by
* subtracting pixel value to a maximum value. The maximum value can
* be set with SetMaximum and defaults the maximum of input pixel
* type. This filter can be used to invert, for example, a binary
* image, a distance map, etc.
*
* \author Gaetan Lehmann. Biologie du Developpement et de la Reproduction, INRA de Jouy-en-Josas, France.
*
* \sa IntensityWindowingImageFilter ShiftScaleImageFilter
* \ingroup IntensityImageFilters MultiThreaded
*
* \ingroup ITKImageIntensity
*
* \wiki
* \wikiexample{ImageProcessing/InvertIntensityImageFilter,Invert an image}
* \endwiki
*/
template< typename TInputImage, typename TOutputImage = TInputImage >
class ITK_TEMPLATE_EXPORT InvertIntensityImageFilter:
public
UnaryFunctorImageFilter< TInputImage, TOutputImage,
Functor::InvertIntensityTransform<
typename TInputImage::PixelType,
typename TOutputImage::PixelType > >
{
public:
/** Standard class typedefs. */
typedef InvertIntensityImageFilter Self;
typedef UnaryFunctorImageFilter< TInputImage, TOutputImage,
Functor::InvertIntensityTransform<
typename TInputImage::PixelType,
typename TOutputImage::PixelType > > Superclass;
typedef SmartPointer< Self > Pointer;
typedef SmartPointer< const Self > ConstPointer;
typedef typename TOutputImage::PixelType OutputPixelType;
typedef typename TInputImage::PixelType InputPixelType;
typedef typename NumericTraits< InputPixelType >::RealType RealType;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** Runtime information support. */
itkTypeMacro(InvertIntensityImageFilter,
UnaryFunctorImageFilter);
/** Set/Get the maximum intensity value for the inversion. */
itkSetMacro(Maximum, InputPixelType);
itkGetConstReferenceMacro(Maximum, InputPixelType);
void PrintSelf(std::ostream & os, Indent indent) const ITK_OVERRIDE;
/** Process to execute before entering the multithreaded section */
void BeforeThreadedGenerateData() ITK_OVERRIDE;
#ifdef ITK_USE_CONCEPT_CHECKING
// Begin concept checking
itkConceptMacro( InputHasNumericTraitsCheck,
( Concept::HasNumericTraits< InputPixelType > ) );
// End concept checking
#endif
protected:
InvertIntensityImageFilter();
virtual ~InvertIntensityImageFilter() ITK_OVERRIDE {}
private:
ITK_DISALLOW_COPY_AND_ASSIGN(InvertIntensityImageFilter);
InputPixelType m_Maximum;
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkInvertIntensityImageFilter.hxx"
#endif
#endif
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