otbGridResampleImageFilter.h

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/*
 * 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 otbGridResampleImageFilter_h
#define otbGridResampleImageFilter_h
 
 
#include "itkImageToImageFilter.h"
#include "itkLinearInterpolateImageFunction.h"
#include "itkDefaultConvertPixelTraits.h"
 
#include "otbMacro.h"
 
namespace otb
{
 
template <typename TInputImage, typename TOutputImage, typename TInterpolatorPrecision = double>
class ITK_EXPORT GridResampleImageFilter : public itk::ImageToImageFilter<TInputImage, TOutputImage>
{
public:
  typedef GridResampleImageFilter Self;
  typedef itk::ImageToImageFilter<TInputImage, TOutputImage> Superclass;
  typedef itk::SmartPointer<Self>       Pointer;
  typedef itk::SmartPointer<const Self> ConstPointer;
 
  itkNewMacro(Self);
 
  itkTypeMacro(GridResampleImageFilter, itk::ImageToImageFilter);
 
  itkStaticConstMacro(ImageDimension, unsigned int, TOutputImage::ImageDimension);
  itkStaticConstMacro(InputImageDimension, unsigned int, TInputImage::ImageDimension);
 
  typedef TInputImage                          InputImageType;
  typedef TOutputImage                         OutputImageType;
  typedef typename OutputImageType::RegionType OutputImageRegionType;
  typedef typename TOutputImage::PixelType     OutputPixelType;
 
 
  typedef itk::DefaultConvertPixelTraits<OutputPixelType> OutputPixelConvertType;
  typedef typename OutputPixelConvertType::ComponentType  OutputPixelComponentType;
 
  typedef itk::InterpolateImageFunction<InputImageType, TInterpolatorPrecision> InterpolatorType;
  typedef typename InterpolatorType::Pointer InterpolatorPointerType;
  typedef itk::LinearInterpolateImageFunction<InputImageType, TInterpolatorPrecision> DefaultInterpolatorType;
  typedef typename InterpolatorType::OutputType                  InterpolatorOutputType;
  typedef itk::DefaultConvertPixelTraits<InterpolatorOutputType> InterpolatorConvertType;
  typedef typename InterpolatorConvertType::ComponentType        InterpolatorComponentType;
 
  typedef typename itk::ContinuousIndex<double, InputImageDimension> ContinuousInputIndexType;
 
  typedef itk::ImageBase<OutputImageType::ImageDimension> ImageBaseType;
  typedef typename ImageBaseType::SpacingType             SpacingType;
  typedef typename ImageBaseType::SizeType                SizeType;
  typedef typename ImageBaseType::PointType               PointType;
  typedef typename ImageBaseType::IndexType               IndexType;
 
  itkSetMacro(OutputStartIndex, IndexType);
  itkGetConstReferenceMacro(OutputStartIndex, IndexType);
 
  itkSetMacro(OutputSize, SizeType);
  itkGetConstReferenceMacro(OutputSize, SizeType);
 
  itkSetMacro(OutputOrigin, PointType);
  itkGetConstReferenceMacro(OutputOrigin, PointType);
 
  itkSetMacro(OutputSpacing, SpacingType);
  itkGetConstReferenceMacro(OutputSpacing, SpacingType);
 
  itkSetMacro(EdgePaddingValue, OutputPixelType);
  itkGetConstReferenceMacro(EdgePaddingValue, OutputPixelType);
 
  itkSetMacro(CheckOutputBounds, bool);
  itkGetMacro(CheckOutputBounds, bool);
  itkBooleanMacro(CheckOutputBounds);
 
  itkSetMacro(InterpolationMargin, double);
  itkGetMacro(InterpolationMargin, double);
 
  itkSetObjectMacro(Interpolator, InterpolatorType);
  itkGetObjectMacro(Interpolator, InterpolatorType);
 
  void SetOutputParametersFromImage(const ImageBaseType* image);
 
  itk::ModifiedTimeType GetMTime(void) const override;
 
protected:
  GridResampleImageFilter();
 
  ~GridResampleImageFilter() override{};
 
  void GenerateOutputInformation() override;
 
  void GenerateInputRequestedRegion() override;
 
  void BeforeThreadedGenerateData() override;
 
  void ThreadedGenerateData(const OutputImageRegionType& outputRegionForThread, itk::ThreadIdType threadId) override;
 
  void AfterThreadedGenerateData() override;
 
  inline void CastPixelWithBoundsChecking(const InterpolatorOutputType& value, const InterpolatorComponentType& minComponent,
                                          const InterpolatorComponentType& maxComponent, OutputPixelType& outputValue) const
  {
    // Method imported from itk::ResampleImageFilter
    const unsigned int nComponents = InterpolatorConvertType::GetNumberOfComponents(value);
 
    itk::NumericTraits<OutputPixelType>::SetLength(outputValue, nComponents);
 
    for (unsigned int n = 0; n < nComponents; n++)
    {
      InterpolatorComponentType component = InterpolatorConvertType::GetNthComponent(n, value);
 
      if (m_CheckOutputBounds && component < minComponent)
      {
        OutputPixelConvertType::SetNthComponent(n, outputValue, static_cast<OutputPixelComponentType>(minComponent));
      }
      else if (m_CheckOutputBounds && component > maxComponent)
      {
        OutputPixelConvertType::SetNthComponent(n, outputValue, static_cast<OutputPixelComponentType>(maxComponent));
      }
      else
      {
        OutputPixelConvertType::SetNthComponent(n, outputValue, static_cast<OutputPixelComponentType>(component));
      }
    }
  }
 
 
  void PrintSelf(std::ostream& os, itk::Indent indent) const override;
 
private:
  GridResampleImageFilter(const Self&) = delete;
  void operator=(const Self&) = delete;
 
  IndexType   m_OutputStartIndex; // output image start index
  SizeType    m_OutputSize;       // output image size
  PointType   m_OutputOrigin;     // output image origin
  SpacingType m_OutputSpacing;    // output image spacing
 
  OutputPixelType m_EdgePaddingValue; // Default pixel value
 
  double m_InterpolationMargin;
 
  bool m_CheckOutputBounds; // Shall we check
                            // output bounds when
                            // casting?
 
  InterpolatorPointerType m_Interpolator; // Interpolator used
                                          // for resampling
 
  OutputImageRegionType m_ReachableOutputRegion; // Internal
                                                 // variable for
                                                 // speed-up. Computed
                                                 // in BeforeThreadedGenerateData
};
 
} // namespace otb
 
#ifndef OTB_MANUAL_INSTANTIATION
#include "otbGridResampleImageFilter.hxx"
#endif
 
#endif