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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 otbProjectiveProjectionImageFilter_h
#define otbProjectiveProjectionImageFilter_h
#include "itkMacro.h"
#include "otbUnaryFunctorImageFilter.h"
namespace otb
{
namespace Functor {
/** \class ProjectiveProjectionFunctor
*
* \brief TODO
*
*
* \ingroup OTBProjection
*/
template<class TInput, class TOutput, class TPrecision>
class ProjectiveProjectionFunctor
{
public:
typedef TInput InputType;
typedef TOutput OutputType;
typedef TPrecision PrecisionType;
ProjectiveProjectionFunctor() : m_OutputSize(0) {}
virtual ~ProjectiveProjectionFunctor() {}
unsigned int GetOutputSize()
{
return m_OutputSize;
}
const InputType& GetProjectionDirection()
{
return m_ProjectionDirection;
}
void SetProjectionDirection(const InputType& p)
{
m_ProjectionDirection = p;
m_OutputSize = m_ProjectionDirection.Size();
}
bool operator !=(const ProjectiveProjectionFunctor& itkNotUsed(other)) const
{
return false;
}
bool operator ==(const ProjectiveProjectionFunctor& other) const
{
return !(*this != other);
}
OutputType operator ()(const InputType& in)
{
PrecisionType dotProduct = 0;
for (unsigned int i = 0; i < in.Size(); ++i)
{
dotProduct += in[i] * m_ProjectionDirection[i];
}
OutputType projected(in.Size());
for (unsigned int j = 0; j < in.Size(); ++j)
{
projected[j] = in[j] / dotProduct;
}
return projected;
}
private:
unsigned int m_OutputSize;
InputType m_ProjectionDirection;
};
}
/** \class ProjectiveProjectionImageFilter
*
* \brief Applies a projective projection to each pixel of an image
*
* \ingroup Streamed
* \ingroup Threaded
*
* \ingroup OTBProjection
*/
template <class TInputImage, class TOutputImage, class TPrecision>
class ITK_EXPORT ProjectiveProjectionImageFilter :
public otb::UnaryFunctorImageFilter<TInputImage, TOutputImage,
Functor::ProjectiveProjectionFunctor<typename TInputImage::PixelType,
typename TOutputImage::PixelType, TPrecision> >
{
public:
/** Standard class typedefs. */
typedef ProjectiveProjectionImageFilter Self;
typedef otb::UnaryFunctorImageFilter
<TInputImage,
TOutputImage,
Functor::ProjectiveProjectionFunctor<
typename TInputImage::PixelType,
typename TOutputImage::PixelType,
TPrecision>
> Superclass;
typedef itk::SmartPointer<Self> Pointer;
typedef itk::SmartPointer<const Self> ConstPointer;
typedef Functor::ProjectiveProjectionFunctor<
typename TInputImage::PixelType,
typename TOutputImage::PixelType,
TPrecision> FunctorType;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** Run-time type information (and related methods). */
itkTypeMacro(ProjectiveProjectionImageFilter, otb::UnaryFunctorImageFilter);
/** Pixel types. */
typedef typename TInputImage::PixelType InputPixelType;
typedef typename TOutputImage::PixelType OutputPixelType;
const InputPixelType& GetProjectionDirection()
{
return this->GetFunctor().GetProjectionDirection();
}
void SetProjectionDirection(const InputPixelType& p)
{
this->GetFunctor().SetProjectionDirection(p);
this->Modified();
}
protected:
ProjectiveProjectionImageFilter();
~ProjectiveProjectionImageFilter() override {}
void PrintSelf(std::ostream& os, itk::Indent indent) const override;
void GenerateOutputInformation() override
{
Superclass::GenerateOutputInformation();
typename Superclass::OutputImagePointer outputPtr = this->GetOutput();
typename Superclass::InputImagePointer inputPtr = this->GetInput();
outputPtr->SetNumberOfComponentsPerPixel( // propagate vector length info
this->GetInput()->GetNumberOfComponentsPerPixel());
}
private:
ProjectiveProjectionImageFilter(const Self &); //purposely not implemented
void operator =(const Self&); //purposely not implemented
};
} // end namespace otb
#ifndef OTB_MANUAL_INSTANTIATION
#include "otbProjectiveProjectionImageFilter.txx"
#endif
#endif
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