/usr/include/OTB-6.4/otbNNearestPointsLinearInterpolateDisplacementFieldGenerator.txx is in libotb-dev 6.4.0+dfsg-1.
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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 otbNNearestPointsLinearInterpolateDisplacementFieldGenerator_txx
#define otbNNearestPointsLinearInterpolateDisplacementFieldGenerator_txx
#define EPSILON 1e-15
#include "otbNNearestPointsLinearInterpolateDisplacementFieldGenerator.h"
#include "itkImageRegionIteratorWithIndex.h"
#include "otbMacro.h"
namespace otb
{
/** Main computation method */
template <class TPointSet, class TDisplacementField>
void
NNearestPointsLinearInterpolateDisplacementFieldGenerator<TPointSet, TDisplacementField>
::GenerateData(void)
{
DisplacementFieldPointerType outputPtr = this->GetOutput();
PixelType defaultValue(2);
defaultValue.Fill(this->GetDefaultValue());
outputPtr->Allocate();
outputPtr->FillBuffer(defaultValue);
typedef itk::ImageRegionIteratorWithIndex<DisplacementFieldType> IteratorType;
IteratorType it(outputPtr, outputPtr->GetRequestedRegion());
for (it.GoToBegin(); !it.IsAtEnd(); ++it)
{
IndexType index = it.GetIndex();
IndexVectorType indexVector = this->GenerateNearestValidPointsPointSet(it.GetIndex(), m_NumberOfPoints);
PixelType pixel(2);
double xdisplacement, ydisplacement, normalization;
xdisplacement = 0;
ydisplacement = 0;
normalization = 0;
for (typename IndexVectorType::iterator indexIt = indexVector.begin(); indexIt != indexVector.end(); ++indexIt)
{
PointType point;
point[0] = static_cast<double>(this->GetPointSet()->GetPoints()->GetElement(*indexIt)[0]);
point[1] = static_cast<double>(this->GetPointSet()->GetPoints()->GetElement(*indexIt)[1]);
double distance = this->EuclideanDistanceMetric(index, point);
if (distance < EPSILON)
{
distance = EPSILON;
}
xdisplacement += this->GetPointSet()->GetPointData()->GetElement((*indexIt))[1] / distance;
ydisplacement += this->GetPointSet()->GetPointData()->GetElement((*indexIt))[2] / distance;
normalization += 1 / distance;
}
if (normalization > 0)
{
pixel[0] = static_cast<ValueType>(xdisplacement / normalization);
pixel[1] = static_cast<ValueType>(ydisplacement / normalization);
}
else
{
pixel = defaultValue;
}
it.Set(pixel);
}
}
/**
* PrintSelf Method
*/
template <class TPointSet, class TDisplacementField>
void
NNearestPointsLinearInterpolateDisplacementFieldGenerator<TPointSet, TDisplacementField>
::PrintSelf(std::ostream& os, itk::Indent indent) const
{
Superclass::PrintSelf(os, indent);
}
} // End namespace otb
#endif
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