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/*
* Copyright (C) 2005-2020 Centre National d'Etudes Spatiales (CNES)
*
* This file is part of Orfeo Toolbox
*
* https://www.orfeo-toolbox.org/
*
* 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
*
* 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 otbLabelImageRegionPruningFilter_h
#define otbLabelImageRegionPruningFilter_h
#include "otbImage.h"
#include "otbVectorImage.h"
#include "itkImageToImageFilter.h"
#include "itkNumericTraits.h"
#include <set>
namespace otb
{
/** \class LabelImageRegionPruningFilter
*
*
* This class merges regions in the input label image according to the input
* image of spectral values and the RangeBandwidth parameter.
*
*
* \ingroup ImageSegmentation
*
* \ingroup OTBConversion
*/
template <class TInputLabelImage, class TInputSpectralImage, class TOutputLabelImage = TInputLabelImage, class TOutputClusteredImage = TInputSpectralImage>
class ITK_EXPORT LabelImageRegionPruningFilter : public itk::ImageToImageFilter<TInputLabelImage, TOutputLabelImage>
{
public:
/** Standard class typedef */
typedef LabelImageRegionPruningFilter Self;
typedef itk::ImageToImageFilter<TInputLabelImage, TOutputLabelImage> Superclass;
typedef itk::SmartPointer<Self> Pointer;
typedef itk::SmartPointer<const Self> ConstPointer;
typedef double RealType;
/** Type macro */
itkTypeMacro(LabelImageRegionPruningFilter, ImageToImageFilter);
itkNewMacro(Self);
/** Template parameters typedefs */
typedef TInputLabelImage InputLabelImageType;
typedef typename InputLabelImageType::PixelType InputLabelType;
typedef TInputLabelImage InputImageType;
typedef typename InputImageType::Pointer InputImagePointerType;
typedef typename InputImageType::PixelType InputPixelType;
typedef typename InputImageType::IndexType InputIndexType;
typedef typename InputImageType::SizeType InputSizeType;
typedef typename InputImageType::IndexValueType InputIndexValueType;
typedef typename InputImageType::PointType PointType;
typedef typename InputImageType::RegionType RegionType;
typedef typename InputImageType::SizeType SizeType;
typedef TInputSpectralImage InputSpectralImageType;
typedef typename TInputSpectralImage::PixelType SpectralPixelType;
typedef TOutputLabelImage OutputLabelImageType;
typedef typename OutputLabelImageType::PixelType OutputLabelType;
typedef TOutputLabelImage OutputImageType;
typedef typename OutputImageType::Pointer OutputImagePointerType;
typedef typename OutputImageType::PixelType OutputPixelType;
typedef typename OutputImageType::RegionType OutputRegionType;
typedef TOutputClusteredImage OutputClusteredImageType;
itkStaticConstMacro(ImageDimension, unsigned int, InputLabelImageType::ImageDimension);
/** Typedefs for region adjacency map */
typedef InputLabelType LabelType;
typedef std::set<LabelType> AdjacentLabelsContainerType;
typedef std::vector<AdjacentLabelsContainerType> RegionAdjacencyMapType;
itkSetMacro(MinRegionSize, RealType);
itkGetConstMacro(MinRegionSize, RealType);
/** Returns the const image of region labels */
const OutputLabelImageType* GetLabelOutput() const;
/** Returns the image of region labels */
OutputLabelImageType* GetLabelOutput();
/** Returns the const clustered output image, with one spectral value per region */
const OutputClusteredImageType* GetClusteredOutput() const;
/** Returns the clustered output image, with one spectral value per region */
OutputClusteredImageType* GetClusteredOutput();
/** Sets the input image where the value of a pixel is the region id */
void SetInputLabelImage(const InputLabelImageType* labelImage);
/** Sets the input image representing spectral values */
void SetInputSpectralImage(const InputSpectralImageType* spectralImage);
/** Returns input label image */
InputLabelImageType* GetInputLabelImage();
/** Returns input spectral image */
InputSpectralImageType* GetInputSpectralImage();
protected:
void EnlargeOutputRequestedRegion(itk::DataObject* output) override;
void GenerateOutputInformation(void) override;
void GenerateData() override;
/** Constructor */
LabelImageRegionPruningFilter();
/** Destructor */
~LabelImageRegionPruningFilter() override;
/** PrintSelf method */
void PrintSelf(std::ostream& os, itk::Indent indent) const override;
/** Method to build a map of adjacent regions */
RegionAdjacencyMapType LabelImageToRegionAdjacencyMap(typename OutputLabelImageType::Pointer inputLabelImage);
private:
LabelImageRegionPruningFilter(const Self&) = delete;
void operator=(const Self&) = delete;
/** Number of components per pixel in the input image */
unsigned int m_NumberOfComponentsPerPixel;
unsigned int m_MinRegionSize;
/** This contains the label to which each label will be merged */
std::vector<LabelType> m_CanonicalLabels;
/** Contains the spectral value for each region */
std::vector<SpectralPixelType> m_Modes;
/** Number of points in each region */
std::vector<unsigned int> m_PointCounts;
};
} // end namespace otb
#ifndef OTB_MANUAL_INSTANTIATION
#include "otbLabelImageRegionPruningFilter.hxx"
#endif
#endif
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