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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 itkHistogramToIntensityImageFilter_h
#define itkHistogramToIntensityImageFilter_h
#include "itkHistogramToImageFilter.h"
namespace itk
{
/** \class HistogramToIntensityImageFilter
* \brief The class takes a histogram as an input and produces an image
* as the output. A pixel, at position I, in the output image is given by
*
* \f[
* f(I) = q_I
* \f]
* where \f$q_I\f$ is the frequency of measurement vector, I.
*
* \sa HistogramToProbabilityImageFilter, HistogramToLogProbabilityImageFilter,
* HistogramToImageFilter, HistogramToEntropyImageFilter
* \ingroup ITKStatistics
*/
namespace Function
{
template< typename TInput, typename TOutput = SizeValueType >
class HistogramIntensityFunction
{
public:
//Intensity function returns pixels of SizeValueType.
typedef TOutput OutputPixelType;
HistogramIntensityFunction():
m_TotalFrequency(1) {}
~HistogramIntensityFunction() {}
inline OutputPixelType operator()(const TInput & A) const
{
return static_cast< OutputPixelType >( A );
}
void SetTotalFrequency(SizeValueType n)
{
m_TotalFrequency = n;
}
SizeValueType GetTotalFrequency() const
{
return m_TotalFrequency;
}
private:
SizeValueType m_TotalFrequency;
};
}
template< typename THistogram, typename TImage=Image< SizeValueType, 3 > >
class HistogramToIntensityImageFilter:
public HistogramToImageFilter< THistogram, TImage,
Function::HistogramIntensityFunction< SizeValueType, typename TImage::PixelType > >
{
public:
/** Standard class typedefs. */
typedef HistogramToIntensityImageFilter Self;
/** Standard "Superclass" typedef. */
typedef HistogramToImageFilter< THistogram, TImage,
Function::HistogramIntensityFunction< SizeValueType, typename TImage::PixelType > >
Superclass;
//typedef typename Function::HistogramIntensityFunction FunctorType;
typedef SmartPointer< Self > Pointer;
typedef SmartPointer< const Self > ConstPointer;
/** Run-time type information (and related methods). */
itkTypeMacro(HistogramToIntensityImageFilter, HistogramToImageFilter);
/** Method for creation through the object factory. */
itkNewMacro(Self);
protected:
HistogramToIntensityImageFilter() {}
virtual ~HistogramToIntensityImageFilter() ITK_OVERRIDE {}
private:
ITK_DISALLOW_COPY_AND_ASSIGN(HistogramToIntensityImageFilter);
};
} // end namespace itk
#endif
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