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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 itkChangeLabelImageFilter_h
#define itkChangeLabelImageFilter_h
#include "itkUnaryFunctorImageFilter.h"
#include "itkConceptChecking.h"
#include "itkSimpleDataObjectDecorator.h"
#include <map>
namespace itk
{
/** \class ChangeLabelImageFilter
*
* \brief Change Sets of Labels
*
* This filter produces an output image whose pixels
* are either copied from the input if they are not being changed
* or are rewritten based on the change parameters
*
* This filter is templated over the input image type
* and the output image type.
*
* The filter expect both images to have the same number of dimensions.
*
* \author Tim Kelliher. GE Research, Niskayuna, NY.
* \note This work was supported by a grant from DARPA, executed by the
* U.S. Army Medical Research and Materiel Command/TATRC Assistance
* Agreement, Contract#W81XWH-05-2-0059.
*
* \ingroup IntensityImageFilters MultiThreaded
* \ingroup ITKImageLabel
*/
namespace Functor
{
template< typename TInput, typename TOutput >
class ITK_TEMPLATE_EXPORT ChangeLabel
{
public:
ChangeLabel() {}
~ChangeLabel() {}
typedef std::map< TInput, TOutput > ChangeMapType;
bool operator!=(const ChangeLabel & other) const
{
if ( m_ChangeMap != other.m_ChangeMap )
{
return true;
}
return false;
}
bool operator==(const ChangeLabel & other) const
{
return !( *this != other );
}
TOutput GetChange(const TInput & original)
{
return m_ChangeMap[original];
}
void SetChange(const TInput & original, const TOutput & result)
{
m_ChangeMap[original] = result;
}
void SetChangeMap(const ChangeMapType & changeMap)
{
m_ChangeMap = changeMap;
}
void ClearChangeMap()
{
m_ChangeMap.clear();
}
inline TOutput operator()(const TInput & A) const
{
const typename ChangeMapType::const_iterator it = m_ChangeMap.find(A);
if ( it != m_ChangeMap.end() )
{
return it->second;
}
return A;
}
private:
ChangeMapType m_ChangeMap;
};
}
template< typename TInputImage, typename TOutputImage >
class ITK_TEMPLATE_EXPORT ChangeLabelImageFilter:
public
UnaryFunctorImageFilter< TInputImage, TOutputImage,
Functor::ChangeLabel<
typename TInputImage::PixelType,
typename TOutputImage::PixelType > >
{
public:
/** Standard class typedefs. */
typedef ChangeLabelImageFilter Self;
typedef UnaryFunctorImageFilter< TInputImage, TOutputImage,
Functor::ChangeLabel<
typename TInputImage::PixelType,
typename TOutputImage::PixelType >
> 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(ChangeLabelImageFilter, UnaryFunctorImageFilter);
/** Pixel types. */
typedef typename TInputImage::PixelType InputPixelType;
typedef typename TOutputImage::PixelType OutputPixelType;
/** Type of the change map to use for change requests */
typedef std::map< InputPixelType, OutputPixelType > ChangeMapType;
/** Set up a change of a single label */
void SetChange(const InputPixelType & original, const OutputPixelType & result);
/** Set the entire change map */
void SetChangeMap(const ChangeMapType & changeMap);
/** Clears the entire change map */
void ClearChangeMap();
#ifdef ITK_USE_CONCEPT_CHECKING
// Begin concept checking
itkConceptMacro( InputConvertibleToOutputCheck,
( Concept::Convertible< InputPixelType, OutputPixelType > ) );
itkConceptMacro( PixelTypeComparable,
( Concept::Comparable< InputPixelType > ) );
// End concept checking
#endif
protected:
ChangeLabelImageFilter();
virtual ~ChangeLabelImageFilter() ITK_OVERRIDE {}
void PrintSelf(std::ostream & os, Indent indent) const ITK_OVERRIDE;
private:
ITK_DISALLOW_COPY_AND_ASSIGN(ChangeLabelImageFilter);
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkChangeLabelImageFilter.hxx"
#endif
#endif
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