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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 itkClampImageFilter_h
#define itkClampImageFilter_h
#include "itkUnaryFunctorImageFilter.h"
namespace itk
{
namespace Functor
{
/** \class Clamp
*
* \brief Functor used to clamp a value to a specified range.
*
* Default range corresponds to the range supported by the
* output type.
*
* It is templated over an input and an output-type in order
* to be able to cast the output value.
*
* \ingroup ITKImageIntensity
*/
template< typename TInput, typename TOutput = TInput >
class ITK_TEMPLATE_EXPORT Clamp
{
public:
typedef Clamp Self;
typedef TInput InputType;
typedef TOutput OutputType;
/** Creates the functor and initializes the bounds to the
* output-type limits.
*/
Clamp();
~Clamp();
OutputType GetLowerBound() const;
OutputType GetUpperBound() const;
/** Set the bounds of the range in which the data will be clamped.
* If the lower-bound is greater than the upper-bound,
* an itk::ExceptionObject will be thrown.
*/
void SetBounds( const OutputType lowerBound, const OutputType upperBound);
bool operator!=( const Self & other ) const;
bool operator==( const Self & other ) const;
OutputType operator()( const InputType & A ) const;
#ifdef ITK_USE_CONCEPT_CHECKING
itkConceptMacro(InputConvertibleToOutputCheck,
(Concept::Convertible< InputType, OutputType >));
itkConceptMacro(InputConvertibleToDoubleCheck,
(Concept::Convertible< InputType, double > ));
itkConceptMacro(DoubleLessThanComparableToOutputCheck,
(Concept::LessThanComparable< double, OutputType > ));
itkConceptMacro(DoubleGreaterThanComparableToOutputCheck,
(Concept::GreaterThanComparable< double, OutputType > ));
#endif
private:
OutputType m_LowerBound;
OutputType m_UpperBound;
};
template< typename TInput, typename TOutput >
inline
typename Clamp< TInput, TOutput >::OutputType
Clamp< TInput, TOutput >
::operator()( const InputType & A ) const
{
const double dA = static_cast< double >( A );
if ( dA < m_LowerBound )
{
return m_LowerBound;
}
if ( dA > m_UpperBound )
{
return m_UpperBound;
}
return static_cast< OutputType >( A );
}
} // end namespace Functor
/** \class ClampImageFilter
*
* \brief Casts input pixels to output pixel type and clamps the
* output pixel values to a specified range.
*
* Default range corresponds to the range supported by the
* pixel type of the output image.
*
* This filter is templated over the input image type
* and the output image type.
*
* \author Gaetan Lehmann. Biologie du Developpement et de la Reproduction, INRA de Jouy-en-Josas, France.
*
* \ingroup IntensityImageFilters
* \ingroup MultiThreaded
* \ingroup ITKImageIntensity
*
* \sa UnaryFunctorImageFilter
* \sa CastImageFilter
*
* \wiki
* \wikiexample{ImageProcessing/ClampImageFilter,Cast an image from one type to another but clamp to the output value range}
* \endwiki
*/
template <typename TInputImage, typename TOutputImage>
class ITK_TEMPLATE_EXPORT ClampImageFilter :
public UnaryFunctorImageFilter< TInputImage,TOutputImage,
Functor::Clamp< typename TInputImage::PixelType,
typename TOutputImage::PixelType > >
{
public:
/** Standard class typedefs. */
typedef ClampImageFilter Self;
typedef UnaryFunctorImageFilter< TInputImage, TOutputImage,
Functor::Clamp< typename TInputImage::PixelType,
typename TOutputImage::PixelType > >
Superclass;
typedef SmartPointer< Self > Pointer;
typedef SmartPointer< const Self > ConstPointer;
typedef typename TInputImage::PixelType InputPixelType;
typedef typename TOutputImage::PixelType OutputPixelType;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** Run-time type information (and related methods). */
itkTypeMacro(ClampImageFilter, UnaryFunctorImageFilter);
OutputPixelType GetLowerBound() const;
OutputPixelType GetUpperBound() const;
/** Set the bounds of the range in which the data will be clamped.
* If the lower-bound is greater than the upper-bound,
* an itk::ExceptionObject will be thrown.
*/
void SetBounds(const OutputPixelType lowerBound, const OutputPixelType upperBound);
protected:
ClampImageFilter();
virtual ~ClampImageFilter() ITK_OVERRIDE {}
void GenerateData() ITK_OVERRIDE;
void PrintSelf(std::ostream & os, Indent indent) const ITK_OVERRIDE;
private:
ITK_DISALLOW_COPY_AND_ASSIGN(ClampImageFilter);
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkClampImageFilter.hxx"
#endif
#endif
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