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/*=========================================================================
*
* Copyright NumFOCUS
*
* 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
*
* https://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:
using ChangeMapType = std::map<TInput, TOutput>;
bool
operator==(const ChangeLabel & other) const
{
return m_ChangeMap == other.m_ChangeMap;
}
ITK_UNEQUAL_OPERATOR_MEMBER_FUNCTION(ChangeLabel);
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;
};
} // namespace Functor
template <typename TInputImage, typename TOutputImage>
class ITK_TEMPLATE_EXPORT ChangeLabelImageFilter
: public UnaryFunctorImageFilter<
TInputImage,
TOutputImage,
Functor::ChangeLabel<typename TInputImage::PixelType, typename TOutputImage::PixelType>>
{
public:
ITK_DISALLOW_COPY_AND_MOVE(ChangeLabelImageFilter);
/** Standard class type aliases. */
using Self = ChangeLabelImageFilter;
using Superclass =
UnaryFunctorImageFilter<TInputImage,
TOutputImage,
Functor::ChangeLabel<typename TInputImage::PixelType, typename TOutputImage::PixelType>>;
using Pointer = SmartPointer<Self>;
using ConstPointer = SmartPointer<const Self>;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** \see LightObject::GetNameOfClass() */
itkOverrideGetNameOfClassMacro(ChangeLabelImageFilter);
/** Pixel types. */
using InputPixelType = typename TInputImage::PixelType;
using OutputPixelType = typename TOutputImage::PixelType;
/** Type of the change map to use for change requests */
using ChangeMapType = std::map<InputPixelType, OutputPixelType>;
/** 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() = default;
~ChangeLabelImageFilter() override = default;
void
PrintSelf(std::ostream & os, Indent indent) const override;
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
# include "itkChangeLabelImageFilter.hxx"
#endif
#endif
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