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/*
* Copyright (C) 2005-2017 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 otbAngularProjectionImageFilter_txx
#define otbAngularProjectionImageFilter_txx
#include "otbAngularProjectionImageFilter.h"
#include <vnl/vnl_math.h>
#include <itkImageRegionIterator.h>
#include <itkProgressAccumulator.h>
namespace otb {
template < class TInputImage, class TOutputImage, class TAngleArray, class TPrecision >
AngularProjectionImageFilter< TInputImage, TOutputImage, TAngleArray, TPrecision >
::AngularProjectionImageFilter ()
{
//this->SetNumberOfRequiredInputs(NumberOfInputImages);
this->SetNumberOfRequiredOutputs(1);
}
template < class TInputImage, class TOutputImage, class TAngleArray, class TPrecision >
void
AngularProjectionImageFilter< TInputImage, TOutputImage, TAngleArray, TPrecision >
::SetInput ( unsigned int i, const InputImageType * img )
{
this->itk::ProcessObject::SetNthInput(i,
const_cast< InputImageType * >( img ) );
}
template < class TInputImage, class TOutputImage, class TAngleArray, class TPrecision >
const TInputImage *
AngularProjectionImageFilter< TInputImage, TOutputImage, TAngleArray, TPrecision >
::GetInput ( unsigned int i ) const
{
if ( i >= this->GetNumberOfInputs() )
{
return ITK_NULLPTR;
}
return static_cast<const InputImageType * >
(this->itk::ProcessObject::GetInput(i) );
}
template < class TInputImage, class TOutputImage, class TAngleArray, class TPrecision >
void
AngularProjectionImageFilter< TInputImage, TOutputImage, TAngleArray, TPrecision >
::ThreadedGenerateData
( const OutputImageRegionType & outputRegionForThread, itk::ThreadIdType threadId )
{
itk::ProgressReporter reporter(this, threadId,
outputRegionForThread.GetNumberOfPixels() );
InputImageRegionType inputRegionForThread;
this->CallCopyOutputRegionToInputRegion( inputRegionForThread, outputRegionForThread );
bool iteratorsAtEnd = false;
ImageRegionConstIteratorVectorType it ( this->GetNumberOfInputs() );
for ( unsigned int i = 0; i < this->GetNumberOfInputs(); ++i )
{
it[i] = ImageRegionConstIteratorType( this->GetInput(i), inputRegionForThread );
it[i].GoToBegin();
if ( it[i].IsAtEnd() )
iteratorsAtEnd = true;
}
itk::ImageRegionIterator<OutputImageType> outIter
( this->GetOutput(), outputRegionForThread );
outIter.GoToBegin();
while ( !iteratorsAtEnd && !outIter.IsAtEnd() )
{
outIter.Set( InternalGenerateData( it ) );
++outIter;
for ( unsigned int i = 0; i < this->GetNumberOfInputs(); ++i )
{
++(it[i]);
if ( it[i].IsAtEnd() )
iteratorsAtEnd = true;
}
reporter.CompletedPixel();
}
}
template < class TInputImage, class TOutputImage, class TAngleArray, class TPrecision >
typename AngularProjectionImageFilter< TInputImage, TOutputImage, TAngleArray, TPrecision >
::OutputImagePixelType
AngularProjectionImageFilter< TInputImage, TOutputImage, TAngleArray, TPrecision >
::InternalGenerateData ( const ImageRegionConstIteratorVectorType & it ) const
{
PrecisionType output = 0;
if ( this->GetNumberOfInputs() == 2 )
{
PrecisionType alpha = static_cast<PrecisionType>( m_AngleArray[0] );
output = static_cast<PrecisionType>( it[0].Get() ) * vcl_cos( alpha )
- static_cast<PrecisionType>( it[1].Get() ) * vcl_sin( alpha );
}
else if ( this->GetNumberOfInputs() == 3 )
{
PrecisionType alpha = static_cast<PrecisionType>( m_AngleArray[0] );
PrecisionType beta = static_cast<PrecisionType>( m_AngleArray[1] );
output = static_cast<PrecisionType>( it[0].Get() ) * vcl_cos( alpha )
- static_cast<PrecisionType>( it[1].Get() ) * vcl_sin( alpha ) * vcl_cos ( beta )
+ static_cast<PrecisionType>( it[2].Get() ) * vcl_sin( alpha ) * vcl_sin ( beta );
}
else
{
unsigned int i = this->GetNumberOfInputs()-1;
output = static_cast<PrecisionType>( it[i--].Get() );
do {
PrecisionType alpha = static_cast<PrecisionType>( m_AngleArray[i] );
output = static_cast<PrecisionType>( it[i].Get() ) * vcl_cos( alpha )
- output * vcl_sin( alpha );
} while ( i-- == 0 );
}
return static_cast<OutputImagePixelType>( output );
}
} // end of namespace otb
#endif
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