otbSubsampleImageFilter.h

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/*
 * Copyright (C) 2005-2022 Centre National d'Etudes Spatiales (CNES)
 * Copyright (C) 2007-2012 Institut Mines Telecom / Telecom Bretagne
 *
 * 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 otbSubsampleImageFilter_h
#define otbSubsampleImageFilter_h
 
#include "itkImageToImageFilter.h"
#include "itkImage.h"
 
// Just to get the forward/inverse definitions
#include "otbWaveletOperatorBase.h"
 
namespace otb
{
 
template <class TInputImage, class TOutputImage, Wavelet::WaveletDirection TDirectionOfTransformation>
class ITK_EXPORT SubsampleImageFilter : public itk::ImageToImageFilter<TInputImage, TOutputImage>
{
public:
  typedef SubsampleImageFilter Self;
  typedef itk::ImageToImageFilter<TInputImage, TOutputImage> Superclass;
  typedef itk::SmartPointer<Self>       Pointer;
  typedef itk::SmartPointer<const Self> ConstPointer;
 
  itkNewMacro(Self);
 
  itkTypeMacro(SubsampleImageFilter, ImageToImageFilter);
 
  itkStaticConstMacro(InputImageDimension, unsigned int, TInputImage::ImageDimension);
  itkStaticConstMacro(OutputImageDimension, unsigned int, TOutputImage::ImageDimension);
 
  typedef Wavelet::WaveletDirection DirectionOfTransformationEnumType;
  itkStaticConstMacro(DirectionOfTransformation, DirectionOfTransformationEnumType, TDirectionOfTransformation);
 
  typedef TInputImage                                  InputImageType;
  typedef typename InputImageType::RegionType          InputImageRegionType;
  typedef typename InputImageType::IndexType           InputImageIndexType;
  typedef typename InputImageIndexType::IndexValueType InputImageIndexValueType;
 
  typedef TOutputImage                         OutputImageType;
  typedef typename OutputImageType::Pointer    OutputImagePointerType;
  typedef typename OutputImageType::RegionType OutputImageRegionType;
  typedef typename OutputImageType::SizeType   OutputImageSizeType;
  typedef typename OutputImageType::IndexType  OutputImageIndexType;
  typedef typename OutputImageType::PixelType  OutputPixelType;
 
  itkGetMacro(SubsampleFactor, const InputImageIndexType&);
  itkSetMacro(SubsampleFactor, InputImageIndexType&);
  void SetSubSampleFactor(InputImageIndexValueType factor)
  {
    InputImageIndexType indexFactor;
    indexFactor.Fill(factor);
    SetSubSampleFactor(indexFactor);
  }
 
protected:
  SubsampleImageFilter()
  {
    m_SubsampleFactor.Fill(1);
  }
  ~SubsampleImageFilter() override
  {
  }
 
  bool IsSubsampleFactorOne() const;
 
  void CallCopyOutputRegionToInputRegion(InputImageRegionType& destRegion, const OutputImageRegionType& srcRegion) override;
  void CallCopyInputRegionToOutputRegion(OutputImageRegionType& destRegion, const InputImageRegionType& srcRegion) override;
 
  void GenerateOutputInformation() override;
 
  void BeforeThreadedGenerateData() override;
 
  void ThreadedGenerateData(const OutputImageRegionType& outputRegionForThread, itk::ThreadIdType threadId) override;
 
  void PrintSelf(std::ostream& os, itk::Indent indent) const override;
 
private:
  SubsampleImageFilter(const Self&) = delete;
  void operator=(const Self&) = delete;
 
  InputImageIndexType m_SubsampleFactor;
}; // end of class
 
} // end of namespace otb
 
#ifndef OTB_MANUAL_INSTANTIATION
#include "otbSubsampleImageFilter.hxx"
#endif
 
#endif