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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 otbMultiToMonoChannelExtractROI_hxx
#define otbMultiToMonoChannelExtractROI_hxx
#include "otbMultiToMonoChannelExtractROI.h"
namespace otb
{
/**
*
*/
template <class TInputPixelType, class TOutputPixelType>
MultiToMonoChannelExtractROI<TInputPixelType, TOutputPixelType>::MultiToMonoChannelExtractROI()
: ExtractROIBase<VectorImage<TInputPixelType, 2>, Image<TOutputPixelType, 2>>(), m_Channel(1)
{
}
/**
*
*/
template <class TInputPixelType, class TOutputPixelType>
void MultiToMonoChannelExtractROI<TInputPixelType, TOutputPixelType>::PrintSelf(std::ostream& os, itk::Indent indent) const
{
Superclass::PrintSelf(os, indent);
}
/**
* ExtractImageFilter can produce an image which is a different resolution
* than its input image. As such, ExtractImageFilter 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::GenerateOutputInformation()
*/
template <class TInputPixelType, class TOutputPixelType>
void MultiToMonoChannelExtractROI<TInputPixelType, TOutputPixelType>::GenerateOutputInformation()
{
typename Superclass::InputImageConstPointer inputPtr = this->GetInput();
// Bounds checking for the channel to process
if ((m_Channel <= 0) || (m_Channel > inputPtr->GetVectorLength()))
{
itkExceptionMacro(<< "otb::MultiToMonoChannelExtractROI::GenerateOutputInformation "
<< "The selected channel must in the range [1;" << inputPtr->GetVectorLength() << "] "
<< typeid(itk::ImageBase<InputImageDimension>*).name());
}
// Calling the superclass method
Superclass::GenerateOutputInformation();
}
template <class TInputPixelType, class TOutputPixelType>
void MultiToMonoChannelExtractROI<TInputPixelType, TOutputPixelType>::ThreadedGenerateData(const OutputImageRegionType& outputRegionForThread,
itk::ThreadIdType threadId)
{
itkDebugMacro(<< "Actually executing");
// Get the input and output pointers
typename Superclass::InputImageConstPointer inputPtr = this->GetInput();
typename Superclass::OutputImagePointer outputPtr = this->GetOutput();
// support progress methods/callbacks
itk::ProgressReporter progress(this, threadId, outputRegionForThread.GetNumberOfPixels());
// Define the portion of the input to walk for this thread
InputImageRegionType inputRegionForThread;
this->CallCopyOutputRegionToInputRegion(inputRegionForThread, outputRegionForThread);
// Define the iterators.
typedef itk::ImageRegionIterator<OutputImageType> OutputIterator;
typedef itk::ImageRegionConstIterator<InputImageType> InputIterator;
OutputIterator outIt(outputPtr, outputRegionForThread);
InputIterator inIt(inputPtr, inputRegionForThread);
// Go through channels to process
const unsigned int channelIn(m_Channel - 1);
while (!outIt.IsAtEnd())
{
InputImagePixelType const& pixelInput = inIt.Get();
OutputImagePixelType const pixelOutput = static_cast<OutputValueType>(pixelInput[channelIn]);
outIt.Set(pixelOutput);
++outIt;
++inIt;
progress.CompletedPixel();
}
}
} // end namespace otb
#endif
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