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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 itkMaskedImageToHistogramFilter_h
#define itkMaskedImageToHistogramFilter_h
#include "itkHistogram.h"
#include "itkImageToHistogramFilter.h"
#include "itkSimpleDataObjectDecorator.h"
namespace itk
{
namespace Statistics
{
/**
* \class MaskedImageToHistogramFilter
* \brief Generate a histogram from the masked pixels of an image.
*
* This class expands the features of the ImageToHistogramFilter by
* adding a required MaskImage input image. Only the pixel in the
* input image where the MaskImage's value is the MaskValue will be
* added to the computed histogram.
*
* \ingroup ITKStatistics
*
* \sphinx
* \sphinxexample{Numerics/Statistics/ComputeHistogramOfMaskedRegion,Compute Histogram Of Masked Region In Image}
* \endsphinx
*/
template <typename TImage, typename TMaskImage>
class ITK_TEMPLATE_EXPORT MaskedImageToHistogramFilter : public ImageToHistogramFilter<TImage>
{
public:
ITK_DISALLOW_COPY_AND_MOVE(MaskedImageToHistogramFilter);
/** Standard type alias */
using Self = MaskedImageToHistogramFilter;
using Superclass = ImageToHistogramFilter<TImage>;
using Pointer = SmartPointer<Self>;
using ConstPointer = SmartPointer<const Self>;
/** \see LightObject::GetNameOfClass() */
itkOverrideGetNameOfClassMacro(MaskedImageToHistogramFilter);
/** standard New() method support */
itkNewMacro(Self);
using ImageType = TImage;
using PixelType = typename ImageType::PixelType;
using RegionType = typename ImageType::RegionType;
using ValueType = typename NumericTraits<PixelType>::ValueType;
using ValueRealType = typename NumericTraits<ValueType>::RealType;
using HistogramType = Histogram<ValueRealType>;
using HistogramPointer = typename HistogramType::Pointer;
using HistogramConstPointer = typename HistogramType::ConstPointer;
using HistogramSizeType = typename HistogramType::SizeType;
using HistogramMeasurementType = typename HistogramType::MeasurementType;
using HistogramMeasurementVectorType = typename HistogramType::MeasurementVectorType;
using MaskImageType = TMaskImage;
using MaskPixelType = typename MaskImageType::PixelType;
/** Method to set/get the mask */
itkSetInputMacro(MaskImage, MaskImageType);
itkGetInputMacro(MaskImage, MaskImageType);
/** Set the pixel value treated as on in the mask.
* Only pixels with this value will be added to the histogram.
*/
itkSetGetDecoratedInputMacro(MaskValue, MaskPixelType);
protected:
MaskedImageToHistogramFilter();
~MaskedImageToHistogramFilter() override = default;
void
ThreadedStreamedGenerateData(const RegionType & inputRegionForThread) override;
void
ThreadedComputeMinimumAndMaximum(const RegionType & inputRegionForThread) override;
};
} // end of namespace Statistics
} // end of namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
# include "itkMaskedImageToHistogramFilter.hxx"
#endif
#endif
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