libotb-dev 5.8.0+dfsg-3 / usr / include / OTB-5.8 / otbExtractROIBase.txx

/*=========================================================================

  Program:   ORFEO Toolbox
  Language:  C++
  Date:      $Date$
  Version:   $Revision$


  Copyright (c) Centre National d'Etudes Spatiales. All rights reserved.
  See OTBCopyright.txt for details.


     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notices for more information.

=========================================================================*/
#ifndef otbExtractROIBase_txx
#define otbExtractROIBase_txx

#include "otbExtractROIBase.h"
#include "itkImageRegionIterator.h"
#include "itkObjectFactory.h"
#include "itkProgressReporter.h"
#include "otbMacro.h"

namespace otb
{

/**
 *
 */
template <class TInputImage, class TOutputImage>
ExtractROIBase<TInputImage, TOutputImage>
::ExtractROIBase() : itk::ImageToImageFilter<TInputImage, TOutputImage>(),
  m_StartX(0),
  m_StartY(0),
  m_SizeX(0),
  m_SizeY(0)
{
}

/**
 *
 */
template <class TInputImage, class TOutputImage>
void
ExtractROIBase<TInputImage, TOutputImage>
::PrintSelf(std::ostream& os, itk::Indent indent) const
{
  Superclass::PrintSelf(os, indent);

  os << indent << "ExtractionRegion: " << m_ExtractionRegion << std::endl;
  os << indent << "OutputImageRegion: " << m_OutputImageRegion << std::endl;
}

template<class TInputImage, class TOutputImage>
void
ExtractROIBase<TInputImage, TOutputImage>
::CallCopyOutputRegionToInputRegion(InputImageRegionType& destRegion,
                                    const OutputImageRegionType& srcRegion)
{
  destRegion = srcRegion;

  OutputImageIndexType index = destRegion.GetIndex();

  for (unsigned int i = 0; i < InputImageDimension; ++i)
    {
    index[i] += m_ExtractionRegion.GetIndex()[i];
    }
  destRegion.SetIndex(index);
}

template <class TInputImage, class TOutputImage>
void
ExtractROIBase<TInputImage, TOutputImage>
::SetInternalExtractionRegion(InputImageRegionType extractRegion)
{
  m_ExtractionRegion = extractRegion;

  unsigned int         nonzeroSizeCount = 0;
  InputImageSizeType   inputSize = extractRegion.GetSize();
  OutputImageSizeType  outputSize;
  OutputImageIndexType outputIndex;

  /**
   * check to see if the number of non-zero entries in the extraction region
   * matches the number of dimensions in the output image.
   **/
  for (unsigned int i = 0; i < InputImageDimension; ++i)
    {
    if (inputSize[i])
      {
      outputSize[nonzeroSizeCount] = inputSize[i];
      outputIndex[nonzeroSizeCount] = 0;
      nonzeroSizeCount++;
      }
    }

  if (nonzeroSizeCount != OutputImageDimension)
    {
    itkExceptionMacro("Extraction Region not consistent with output image");
    }

  m_OutputImageRegion.SetSize(outputSize);
  m_OutputImageRegion.SetIndex(outputIndex);

  this->Modified();
}

template <class TInputImage, class TOutputImage>
void
ExtractROIBase<TInputImage, TOutputImage>
::SetExtractionRegion(InputImageRegionType roi)
{
  m_SizeX = roi.GetSize()[0];
  m_SizeY = roi.GetSize()[1];
  m_StartX = roi.GetIndex()[0];
  m_StartY = roi.GetIndex()[1];

  this->Modified();
}

template <class TInputImage, class TOutputImage>
void
ExtractROIBase<TInputImage, TOutputImage>
::GenerateInputRequestedRegion()
{
  Superclass::GenerateInputRequestedRegion();

  typename Superclass::InputImagePointer  inputPtr  = const_cast<InputImageType*>(this->GetInput());
  typename Superclass::OutputImagePointer outputPtr = this->GetOutput();

  if (!inputPtr)
    {
    return;
    }
  if (!outputPtr)
    {
    return;
    }
  InputImageRegionType requestedRegion = outputPtr->GetRequestedRegion();
  InputImageIndexType  index = requestedRegion.GetIndex();
  InputImageIndexType  offset = m_ExtractionRegion.GetIndex();

  for (unsigned int i = 0; i < InputImageDimension; ++i)
    {
    index[i] += offset[i];
    }
  requestedRegion.SetIndex(index);
  inputPtr->SetRequestedRegion(requestedRegion);

  otbMsgDevMacro(<< "InputRequestedRegion (otbExtractROIBase): ");
  otbMsgDevMacro(<< "  - index: " << requestedRegion.GetIndex());
  otbMsgDevMacro(<< "  - size:  " << requestedRegion.GetSize());

}

/**
 * ExtractROIBase can produce an image which is a different resolution
 * than its input image.  As such, ExtractROIBase needs to provide an
 * implementation for GenerateOutputInformation() in order to inform
 * the pipeline execution model.  The original documentation of this
 * method is below.
 *
 * \sa ProcessObject::GenerateOutputInformaton()
 */
template <class TInputImage, class TOutputImage>
void
ExtractROIBase<TInputImage, TOutputImage>
::GenerateOutputInformation()
{
  Superclass::GenerateOutputInformation();

  // Compute the area to extract
  // If SizeX/Y == 0, then set SizeX/Y to image size
  typename Superclass::InputImageConstPointer inputPtr  = this->GetInput();

  // Check if input exists or not before doing anything
  if (!inputPtr)
    {
    return;
    }

  // Get the input image
  //const InputImageRegionType& inputRegion = inputPtr->GetRequestedRegion();
  const InputImageRegionType& inputRegion = inputPtr->GetLargestPossibleRegion();

  if ((m_SizeX == 0) || (m_SizeX > (inputRegion.GetSize()[0] - m_StartX)))
    {
    m_SizeX = inputRegion.GetSize()[0] - m_StartX;
    }
  if ((m_SizeY == 0) || (m_SizeY > (inputRegion.GetSize()[1] - m_StartY)))
    {
    m_SizeY = inputRegion.GetSize()[1] - m_StartY;
    }

  InputImageIndexType start;
  start[0] = m_StartX;
  start[1] = m_StartY;
  InputImageSizeType size;
  size[0] = m_SizeX;
  size[1] = m_SizeY;
  InputImageRegionType desiredRegion;
  desiredRegion.SetSize(size);
  desiredRegion.SetIndex(start);
  // Call to the base class method for region initialization
  this->SetInternalExtractionRegion(desiredRegion);

  // do not call the superclass' implementation of this method since
  // this filter allows the input the output to be of different dimensions

  // get pointers to the input and output
  typename Superclass::OutputImagePointer outputPtr = this->GetOutput();
//  typename Superclass::InputImageConstPointer  inputPtr  = this->GetInput();

  if (!inputPtr)
    {
    return;
    }
  if (!outputPtr)
    {
    return;
    }

  // Set the output image size to the same value as the extraction region.
  outputPtr->SetLargestPossibleRegion(m_OutputImageRegion);

  // Set the output spacing and origin
  const itk::ImageBase<InputImageDimension> *phyData;

  phyData
    = dynamic_cast<const itk::ImageBase<InputImageDimension>*>(this->GetInput());

  if (!phyData)
    {
    // pointer could not be cast back down
    itkExceptionMacro(<< "otb::ExtractROIBase::GenerateOutputInformation "
                      << "cannot cast input to "
                      << typeid(itk::ImageBase<InputImageDimension>*).name());
    }

  // Copy what we can from the image from spacing and origin of the input
  // This logic needs to be augmented with logic that select which
  // dimensions to copy
  const typename InputImageType::SpacingType&
    inputSpacing = inputPtr->GetSpacing();
  const typename InputImageType::DirectionType&
    inputDirection = inputPtr->GetDirection();
  const typename InputImageType::PointType&
    inputOrigin = inputPtr->GetOrigin();

  typename OutputImageType::SpacingType   outputSpacing;
  typename OutputImageType::DirectionType outputDirection;
  typename OutputImageType::PointType     outputOrigin;

  if (static_cast<unsigned int>(OutputImageDimension) >
      static_cast<unsigned int>(InputImageDimension))
    {
    unsigned int i;
    // copy the input to the output and fill the rest of the
    // output with zeros.
    for (i = 0; i < InputImageDimension; ++i)
      {
      outputSpacing[i] = inputSpacing[i];
      outputOrigin[i] = inputOrigin[i] + static_cast<double>(m_ExtractionRegion.GetIndex()[i]) * outputSpacing[i];
      for (unsigned int dim = 0; dim < InputImageDimension; ++dim)
        {
        outputDirection[i][dim] = inputDirection[i][dim];
        }
      }
    for (; i < OutputImageDimension; ++i)
      {
      outputSpacing[i] = 1.0;
      outputOrigin[i] = 0.0;
      for (unsigned int dim = 0; dim < InputImageDimension; ++dim)
        {
        outputDirection[i][dim] = 0.0;
        }
      outputDirection[i][i] = 1.0;
      }
    }
  else
    {
    // copy the non-collapsed part of the input spacing and origing to the output
    int nonZeroCount = 0;
    for (unsigned int i = 0; i < InputImageDimension; ++i)
      {
      if (m_ExtractionRegion.GetSize()[i] == 0) continue;

      outputSpacing[nonZeroCount] = inputSpacing[i];
      outputOrigin[nonZeroCount] = inputOrigin[i] + static_cast<double>(m_ExtractionRegion.GetIndex()[i]) *
        outputSpacing[i];
      for (unsigned int dim = 0; dim < OutputImageDimension; ++dim)
        {
        outputDirection[nonZeroCount][dim] =
          inputDirection[nonZeroCount][dim];
        }
      nonZeroCount++;
      }
    }

  // set the spacing and origin
  outputPtr->SetSpacing(outputSpacing);
  outputPtr->SetDirection(outputDirection);
  outputPtr->SetOrigin(outputOrigin);
// THOMAS : dans ITK ce code est present, mais pas dans notre cas, car le nombre de composantes/pixel depend des canaux selectionnes par l'utilisateur
//          ce parametre est renseignes dans les classes sous-jacentes
//    outputPtr->SetNumberOfComponentsPerPixel(
//       inputPtr->GetNumberOfComponentsPerPixel() );
}

} // end namespace otb

#endif