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/*
* Copyright (C) 2005-2017 Centre National d'Etudes Spatiales (CNES)
* Copyright (C) 2007-2012 Institut Mines Telecom / Telecom Bretagne
*
* 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 otbKullbackLeiblerSupervizedDistanceImageFilter_txx
#define otbKullbackLeiblerSupervizedDistanceImageFilter_txx
#include "otbKullbackLeiblerSupervizedDistanceImageFilter.h"
namespace otb
{
namespace Functor
{
template <class TInput1, class TInput2, class TInputROIImage, class TOutput>
KullbackLeiblerSupervizedDistance<TInput1, TInput2, TInputROIImage, TOutput>
::KullbackLeiblerSupervizedDistance ()
{
m_CumROI1 = ITK_NULLPTR;
m_CumROI2 = ITK_NULLPTR;
}
template <class TInput1, class TInput2, class TInputROIImage, class TOutput>
KullbackLeiblerSupervizedDistance<TInput1, TInput2, TInputROIImage, TOutput>
::~KullbackLeiblerSupervizedDistance ()
{
delete m_CumROI1;
m_CumROI1 = ITK_NULLPTR;
delete m_CumROI2;
m_CumROI2 = ITK_NULLPTR;
}
template <class TInput1, class TInput2, class TInputROIImage, class TOutput>
void
KullbackLeiblerSupervizedDistance<TInput1, TInput2, TInputROIImage, TOutput>
::Evaluate(const typename TInput1::ImageType * img1,
const typename TInput2::ImageType * img2,
const TInputROIImage * imgROI)
{
typename ROIConversionType1::Pointer conversion1 = ROIConversionType1::New();
conversion1->SetInputImage(img1);
conversion1->SetROIImage(imgROI);
conversion1->Update();
if (m_CumROI1 != ITK_NULLPTR) delete m_CumROI1;
m_CumROI1 = new CumulantsForEdgeworth<ROIInputType1> (conversion1->GetOutput());
if (!m_CumROI1->IsDataAvailable())
{
throw itk::ExceptionObject(__FILE__,
__LINE__,
"Cumulants estimated from ROI in image 1 are not usable",
ITK_LOCATION);
}
typedef ROIdataConversion<typename TInput2::ImageType, TInputROIImage>
ROIConversionType2;
typedef itk::ConstNeighborhoodIterator<
typename ROIConversionType2::OutputImageType> ROIInputType2;
typename ROIConversionType2::Pointer conversion2 = ROIConversionType2::New();
conversion2->SetInputImage(img2);
conversion2->SetROIImage(imgROI);
conversion2->Update();
if (m_CumROI2 != ITK_NULLPTR) delete m_CumROI2;
m_CumROI2 = new CumulantsForEdgeworth<ROIInputType2> (conversion2->GetOutput());
if (!m_CumROI2->IsDataAvailable())
{
throw itk::ExceptionObject(__FILE__,
__LINE__,
"Cumulants estimated from ROI in image 2 are not usable",
ITK_LOCATION);
}
}
template <class TInput1, class TInput2, class TInputROIImage, class TOutput>
TOutput
KullbackLeiblerSupervizedDistance<TInput1, TInput2, TInputROIImage, TOutput>
::operator() (const TInput1 &it1, const TInput2 &it2)
{
CumulantsForEdgeworth<TInput1> cum1(it1);
if (!cum1.IsDataAvailable())
{
return static_cast<TOutput> (0.);
}
CumulantsForEdgeworth<TInput2> cum2(it2);
if (!cum2.IsDataAvailable())
{
return static_cast<TOutput> (0.);
}
return static_cast<TOutput> (m_CumROI1->Divergence(cum1)
+ m_CumROI2->Divergence(cum2));
}
} // end of namespace Functor
/**
* Connect the training area to build the reference pdfs,
* with parameters to be hold by
* Functor::KullbackLeiblerSupervizedDistance.
*
* Images 1 & 2 are supposed to be already connected.
*/
template <class TInputImage1, class TInputImage2, class TInputROIImage, class TOutputImage>
void
KullbackLeiblerSupervizedDistanceImageFilter<TInputImage1, TInputImage2, TInputROIImage, TOutputImage>
::SetTrainingArea(const TInputROIImage * trainingImage)
{
this->itk::ProcessObject::SetNthInput(2, const_cast<TInputROIImage *>(trainingImage));
}
template <class TInputImage1, class TInputImage2, class TInputROIImage, class TOutputImage>
void
KullbackLeiblerSupervizedDistanceImageFilter<TInputImage1, TInputImage2, TInputROIImage, TOutputImage>
::BeforeThreadedGenerateData(void)
{
typename TInputImage1::ConstPointer inputPtr1
= dynamic_cast<const TInputImage1*>(this->GetInput(0));
typename TInputImage2::ConstPointer inputPtr2
= dynamic_cast<const TInputImage2*>(this->GetInput(1));
typename TInputROIImage::ConstPointer trainingImage
= static_cast<const TInputROIImage *>(this->itk::ProcessObject::GetInput(2));
this->GetFunctor().Evaluate(inputPtr1, inputPtr2, trainingImage);
}
} // end of namespace otb
#endif
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