otbKMeansImageClassificationFilter.h

Go to the documentation of this file.

/*
 * Copyright (C) 2005-2022 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 otbKMeansImageClassificationFilter_h
#define otbKMeansImageClassificationFilter_h
 
#include "itkInPlaceImageFilter.h"
#include "itkListSample.h"
#include "itkEuclideanDistanceMetric.h"
 
namespace otb
{
template <class TInputImage, class TOutputImage, unsigned int VMaxSampleDimension = 10, class TMaskImage = TOutputImage>
class ITK_EXPORT KMeansImageClassificationFilter : public itk::InPlaceImageFilter<TInputImage, TOutputImage>
{
public:
  typedef KMeansImageClassificationFilter Self;
  typedef itk::InPlaceImageFilter<TInputImage, TOutputImage> Superclass;
  typedef itk::SmartPointer<Self>       Pointer;
  typedef itk::SmartPointer<const Self> ConstPointer;
 
  itkNewMacro(Self);
 
  itkTypeMacro(KMeansImageClassificationFilter, InPlaceImageFilter);
 
  itkStaticConstMacro(MaxSampleDimension, unsigned int, VMaxSampleDimension);
 
  typedef TInputImage                                InputImageType;
  typedef typename InputImageType::ConstPointer      InputImageConstPointerType;
  typedef typename InputImageType::InternalPixelType ValueType;
 
  typedef TMaskImage                           MaskImageType;
  typedef typename MaskImageType::ConstPointer MaskImageConstPointerType;
  typedef typename MaskImageType::Pointer      MaskImagePointerType;
 
  typedef TOutputImage                         OutputImageType;
  typedef typename OutputImageType::Pointer    OutputImagePointerType;
  typedef typename OutputImageType::RegionType OutputImageRegionType;
  typedef typename OutputImageType::PixelType  LabelType;
 
  typedef itk::FixedArray<ValueType, MaxSampleDimension> SampleType;
  typedef itk::Array<double> KMeansParametersType;
  typedef std::map<LabelType, SampleType> CentroidsMapType;
  typedef itk::Statistics::EuclideanDistanceMetric<SampleType> DistanceType;
 
  itkSetMacro(Centroids, KMeansParametersType);
  itkGetConstReferenceMacro(Centroids, KMeansParametersType);
 
  itkSetMacro(DefaultLabel, LabelType);
  itkGetMacro(DefaultLabel, LabelType);
 
  void SetInputMask(const MaskImageType* mask);
 
  const MaskImageType* GetInputMask(void);
 
protected:
  KMeansImageClassificationFilter();
 
  ~KMeansImageClassificationFilter() override = default;
 
  void ThreadedGenerateData(const OutputImageRegionType& outputRegionForThread, itk::ThreadIdType threadId) override;
 
  void BeforeThreadedGenerateData() override;
 
  void PrintSelf(std::ostream& os, itk::Indent indent) const override;
 
private:
  KMeansImageClassificationFilter(const Self&) = delete;
  void operator=(const Self&) = delete;
 
  KMeansParametersType m_Centroids;
 
  LabelType m_DefaultLabel;
 
  CentroidsMapType m_CentroidsMap;
};
} // End namespace otb
#ifndef OTB_MANUAL_INSTANTIATION
#include "otbKMeansImageClassificationFilter.hxx"
#endif
 
#endif