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/*
* Copyright (C) 2005-2020 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 otbComputeHistoFilter_h
#define otbComputeHistoFilter_h
#include "itkImageToImageFilter.h"
#include "otbImage.h"
#include "itkImageRegionIterator.h"
namespace otb
{
/** \class ComputeHistoFilter
* \brief Compute local histogram with several parameters
*
* This class implements the first part of the CLAHE algorithm. It aims
* to compute local histogram with several input parameters such as
* nodata value, threshold, thumbnail size and number of bin. Mandatory parameters are min
* and max value as it will be used in the histogram computation.
*
* \ingroup OTBContrast
*/
template <class TInputImage, class TOutputImage>
class ITK_EXPORT ComputeHistoFilter : public itk::ImageToImageFilter<TInputImage, TOutputImage>
{
public:
/** typedef for standard classes. */
typedef TInputImage InputImageType;
typedef TOutputImage OutputImageType;
typedef ComputeHistoFilter Self;
typedef itk::ImageToImageFilter<InputImageType, OutputImageType> Superclass;
typedef itk::SmartPointer<Self> Pointer;
typedef itk::SmartPointer<const Self> ConstPointer;
typedef typename InputImageType::InternalPixelType InputPixelType;
typedef typename InputImageType::IndexType IndexType;
typedef typename InputImageType::SizeType SizeType;
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 number of bin. Default value is 256 */
itkSetMacro(NbBin, unsigned int);
itkGetMacro(NbBin, unsigned int);
/** 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);
/** 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 thumbnail's size */
itkSetMacro(ThumbSize, SizeType);
itkGetMacro(ThumbSize, SizeType);
/** Get/Set macro to get/set the threshold parameter */
itkSetMacro(Threshold, float);
itkGetMacro(Threshold, float);
typename OutputImageType::Pointer GetHistoOutput();
virtual itk::ProcessObject::DataObjectPointer MakeOutput(itk::ProcessObject::DataObjectPointerArraySizeType idx) override;
virtual itk::ProcessObject::DataObjectPointer MakeOutput(const itk::ProcessObject::DataObjectIdentifierType&) override;
protected:
ComputeHistoFilter();
~ComputeHistoFilter() override
{
}
void PrintSelf(std::ostream& os, itk::Indent indent) const override;
void GenerateInputRequestedRegion() override;
void GenerateOutputInformation() override;
// Call BeforeThreadedGenerateData after getting the number of thread
void GenerateData() override;
void BeforeThreadedGenerateData() override;
virtual void ThreadedGenerateData(const OutputImageRegionType& outputRegionForThread, itk::ThreadIdType threadId) override;
void AfterThreadedGenerateData() override;
void GenerateOutputRequestedRegion(itk::DataObject* output) override;
private:
ComputeHistoFilter(const Self&) = delete;
void operator=(const Self&) = delete;
void SetRequestedRegion(itk::ImageBase<2>* image);
void ApplyThreshold(typename itk::ImageRegionIterator<OutputImageType> oit, unsigned int total);
std::vector<typename OutputImageType::PixelType> m_HistoThread;
InputPixelType m_Min;
InputPixelType m_Max;
InputPixelType m_NoData;
SizeType m_ThumbSize{0,0};
bool m_NoDataFlag;
double m_Step;
float m_Threshold;
unsigned int m_NbBin;
unsigned int m_ValidThreads;
};
} // End namespace otb
#ifndef OTB_MANUAL_INSTANTIATION
#include "otbComputeHistoFilter.hxx"
#endif
#endif
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