otbROIdataConversion.hxx

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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 otbROIdataConversion_hxx
#define otbROIdataConversion_hxx
 
#include "itkVector.h"
 
#include "otbROIdataConversion.h"
#include "itkImageRegionIterator.h"
 
namespace otb
{
 
template <class TInputImage, class TInputROIImage>
ROIdataConversion<TInputImage, TInputROIImage>::ROIdataConversion()
{
  this->SetNumberOfRequiredInputs(2);
  this->SetNumberOfRequiredInputs(2);
}
 
template <class TInputImage, class TInputROIImage>
void ROIdataConversion<TInputImage, TInputROIImage>::GenerateOutputInformation(void)
{
  typename OutputImageType::Pointer  outputPtr  = this->GetOutput();
  typename OutputImageType::SizeType outputSize = outputPtr->GetRequestedRegion().GetSize();
  outputSize[0]                                 = GetNumberOfSample();
  outputPtr->SetRegions(outputSize);
}
 
template <class TInputImage, class TInputROIImage>
void ROIdataConversion<TInputImage, TInputROIImage>::GenerateInputRequestedRegion(void)
{
  typename InputImageType::Pointer    inputImagePtr = const_cast<InputImageType*>(this->GetInputImage());
  typename InputROIImageType::Pointer inputROIPtr   = this->GetROIImage();
  inputImagePtr->SetRequestedRegion(inputImagePtr->GetLargestPossibleRegion());
  inputROIPtr->SetRequestedRegion(inputROIPtr->GetLargestPossibleRegion());
}
 
template <class TInputImage, class TInputROIImage>
void ROIdataConversion<TInputImage, TInputROIImage>::GenerateData()
{
  typename InputImageType::Pointer         inputImagePtr = const_cast<InputImageType*>(this->GetInputImage());
  typename InputROIImageType::ConstPointer inputROIPtr   = this->GetROIImage();
  typename OutputImageType::Pointer        outputPtr     = this->GetOutput();
 
  outputPtr->Allocate();
  typename InputImageType::PixelType zero;
  itk::NumericTraits<typename InputImageType::PixelType>::SetLength(zero, outputPtr->GetNumberOfComponentsPerPixel());
  outputPtr->FillBuffer(zero);
 
  itk::ImageRegionConstIterator<InputImageType>    inputIter(inputImagePtr, inputImagePtr->GetRequestedRegion());
  itk::ImageRegionConstIterator<InputROIImageType> trainingIter(inputROIPtr, inputROIPtr->GetRequestedRegion());
  itk::ImageRegionIterator<OutputImageType>        outputIter(outputPtr, outputPtr->GetRequestedRegion());
 
  inputIter.GoToBegin();
  trainingIter.GoToBegin();
  outputIter.GoToBegin();
 
  while (!trainingIter.IsAtEnd())
  {
    if (trainingIter.Get() != 0)
    {
      outputIter.Set(inputIter.Get());
      ++outputIter;
    }
 
    ++inputIter;
    ++trainingIter;
  }
}
 
template <class TInputImage, class TInputROIImage>
typename ROIdataConversion<TInputImage, TInputROIImage>::SizeValueType ROIdataConversion<TInputImage, TInputROIImage>::GetNumberOfSample()
{
  InputROIImagePointerType                         inputROIPtr = GetROIImage();
  itk::ImageRegionConstIterator<InputROIImageType> trainingIter(inputROIPtr, inputROIPtr->GetRequestedRegion());
 
  trainingIter.GoToBegin();
 
  SizeValueType count = 0L;
  while (!trainingIter.IsAtEnd())
  {
    if (trainingIter.Get() != 0)
      count++;
    ++trainingIter;
  }
 
  return count;
}
 
} // end of namespace otb
 
#endif