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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 otbApplyGainFilter_h
#define otbApplyGainFilter_h
#include "itkImageToImageFilter.h"
#include "otbImage.h"
namespace otb
{
/** \class ApplyGainFilter
* \brief Apply gain on the input image with a bilineare interpolation
*
* This class implements the third part of the CLAHE algorithm. It's aim
* is to apply the computed gain with a bilineare interpolation. The gain
* is in a look up table, and the minimum and maximum asked by the filter
* should be the same as the one used to compute those look up table.
*
* \ingroup OTBContrast
*/
template < class TInputImage , class TLut , class TOutputImage >
class ITK_EXPORT ApplyGainFilter :
public itk::ImageToImageFilter< TInputImage , TOutputImage >
{
public :
/** typedef for standard classes. */
typedef TInputImage InputImageType;
typedef TOutputImage OutputImageType;
typedef ApplyGainFilter Self;
typedef itk::ImageToImageFilter< InputImageType, OutputImageType > Superclass;
typedef itk::SmartPointer< Self > Pointer;
typedef itk::SmartPointer< const Self > ConstPointer;
typedef TLut LutType;
typedef typename InputImageType::InternalPixelType InputPixelType;
typedef typename OutputImageType::InternalPixelType OutputPixelType;
typedef typename OutputImageType::RegionType OutputImageRegionType;
/** Method for creation through the object factory. */
itkNewMacro(Self)
/** Run-time type information (and related methods). */
itkTypeMacro(ComputeHistoFilter, ImageToImageFilter)
/** Get/Set macro to get/set the nodata value */
itkSetMacro(NoData, InputPixelType)
itkGetMacro(NoData, InputPixelType)
/** Get/Set macro to get/set the nodata flag value */
itkBooleanMacro(NoDataFlag)
itkGetMacro(NoDataFlag, bool)
itkSetMacro(NoDataFlag, bool)
/** Get/Set macro to get/set the ThumbSizeFromSpacing flag value */
itkBooleanMacro(ThumbSizeFromSpacing)
itkGetMacro(ThumbSizeFromSpacing, bool)
itkSetMacro(ThumbSizeFromSpacing, bool)
/** Get/Set macro to get/set the thumbnail's size */
itkSetMacro(ThumbSize, typename InputImageType::SizeType)
itkGetMacro(ThumbSize, typename InputImageType::SizeType)
/** Get/Set macro to get/set the minimum value */
itkSetMacro(Min, InputPixelType)
itkGetMacro(Min, InputPixelType)
/** Get/Set macro to get/set the maximum value */
itkSetMacro(Max, InputPixelType)
itkGetMacro(Max, InputPixelType)
/** Set the input look up table*/
void SetInputLut( const LutType * lut) ;
/** Set the input image*/
void SetInputImage( const InputImageType * input) ;
protected :
ApplyGainFilter();
~ApplyGainFilter() override {}
void PrintSelf(std::ostream& os, itk::Indent indent) const override;
/** Get the input image*/
const InputImageType * GetInputImage() const;
/** Get the input look up table*/
const LutType * GetInputLut() const;
void GenerateInputRequestedRegion() override;
void BeforeThreadedGenerateData() override;
void ThreadedGenerateData(const OutputImageRegionType & outputRegionForThread,
itk::ThreadIdType threadId) override;
void VerifyInputInformation() override {} ;
private :
ApplyGainFilter(const Self &) = delete ;
void operator =(const Self&) = delete ;
/** Bilinear interpolation of the gain between the different window.*/
double InterpolateGain( typename LutType::ConstPointer gridLut ,
unsigned int pixelValue ,
typename InputImageType::IndexType index);
InputPixelType m_NoData;
InputPixelType m_Min;
InputPixelType m_Max;
bool m_NoDataFlag;
bool m_ThumbSizeFromSpacing;
double m_Step;
typename LutType::SizeType m_LutSize;
typename InputImageType::SizeType m_ThumbSize;
};
} // End namespace otb
#ifndef OTB_MANUAL_INSTANTIATION
#include "otbApplyGainFilter.txx"
#endif
#endif
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