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/*=========================================================================
Program: ORFEO Toolbox
Language: C++
Date: $Date$
Version: $Revision$
Copyright (c) Centre National d'Etudes Spatiales. All rights reserved.
See OTBCopyright.txt for details.
Some parts of this code are derived from ITK. See ITKCopyright.txt
for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#ifndef otbBandMathXImageFilter_h
#define otbBandMathXImageFilter_h
#include "itkConstNeighborhoodIterator.h"
#include "itkImageToImageFilter.h"
#include "itkArray.h"
#include "otbStreamingStatisticsVectorImageFilter.h"
#include "otbParserX.h"
#include <vector>
namespace otb
{
/** \class BandMathXImageFilter
* \brief Performs mathematical operations on the input images
* according to the formula specified by the user.
*
* This filter is based on the mathematical parser library muParserX.
* The built in functions and operators list is available at:
* http://articles.beltoforion.de/article.php?a=muparserx.
*
* In order to use this filter, at least one input image is to be
* set. An associated variable name can be specified or not by using
* the corresponding SetNthInput method. For the jth (j=1..T) input image, if
* no associated variable name has been specified, a default variable
* name is given by concatenating the prefix "im" with the
* corresponding input index plus one (for instance, im1 is related to the first input).
* If the jth input image is multidimensional, then the variable imj represents a vector whose components are related to its bands.
* In order to access the kth band, the variable observes the following pattern : imjbk.
*
* \sa Parser
*
* \ingroup Streamed
* \ingroup Threaded
*
* \ingroup OTBMathParserX
*/
template< class TImage >
class ITK_EXPORT BandMathXImageFilter
: public itk::ImageToImageFilter< TImage , TImage >
{
public:
/** Standard class typedefs. */
typedef BandMathXImageFilter< TImage > Self;
typedef itk::ImageToImageFilter< TImage , TImage> Superclass;
typedef itk::SmartPointer< Self > Pointer;
typedef itk::SmartPointer< const Self > ConstPointer;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** Run-time type information (and related methods). */
itkTypeMacro(BandMathXImageFilter, ImageToImageFilter);
/** Some convenient typedefs. */
typedef TImage ImageType;
typedef typename ImageType::ConstPointer ConstImagePointer;
typedef typename ImageType::Pointer ImagePointer;
typedef typename ImageType::RegionType ImageRegionType;
typedef typename itk::ConstNeighborhoodIterator<TImage>::RadiusType RadiusType;
typedef typename ImageType::PixelType::ValueType PixelValueType;
typedef typename ImageType::PixelType PixelType;
typedef typename ImageType::IndexType IndexType;
typedef typename ImageType::PointType OrigineType;
typedef typename ImageType::SpacingType SpacingType;
typedef ParserX ParserType;
typedef typename ParserType::ValueType ValueType;
typedef itk::ProcessObject::DataObjectPointerArraySizeType DataObjectPointerArraySizeType;
/** Typedef for statistic computing. */
typedef StreamingStatisticsVectorImageFilter<ImageType> StreamingStatisticsVectorImageFilterType;
typedef typename StreamingStatisticsVectorImageFilterType::Pointer StreamingStatisticsVectorImageFilterPointerType;
typedef typename StreamingStatisticsVectorImageFilterType::MatrixType MatrixType;
/** Set the nth filter input with or without a specified associated variable name */
using Superclass::SetNthInput;
void SetNthInput( DataObjectPointerArraySizeType idx, const ImageType * image);
void SetNthInput( DataObjectPointerArraySizeType idx, const ImageType * image, const std::string& varName);
/** Return a pointer on the nth filter input */
ImageType * GetNthInput(DataObjectPointerArraySizeType idx);
/** Set an expression to be parsed */
void SetManyExpressions(bool flag);
/** Set an expression to be parsed */
void SetExpression(const std::string& expression);
/** Return the nth expression to be parsed */
std::string GetExpression(int) const;
/** Set a matrix (or a vector) */
void SetMatrix(const std::string& name, const std::string& definition);
/** Set a constant */
void SetConstant(const std::string& name, double value);
/** Export constants and expressions to a given filename */
void ExportContext(const std::string& filename);
/** Import constants and expressions from a given filename */
void ImportContext(const std::string& filename);
/** Return the variable and constant names */
std::vector<std::string> GetVarNames() const;
protected :
BandMathXImageFilter();
~BandMathXImageFilter() ITK_OVERRIDE;
void PrintSelf(std::ostream& os, itk::Indent indent) const ITK_OVERRIDE;
void GenerateOutputInformation() ITK_OVERRIDE;
void GenerateInputRequestedRegion() ITK_OVERRIDE;
void BeforeThreadedGenerateData() ITK_OVERRIDE;
void ThreadedGenerateData(const ImageRegionType& outputRegionForThread, itk::ThreadIdType threadId ) ITK_OVERRIDE;
void AfterThreadedGenerateData() ITK_OVERRIDE;
private :
bool globalStatsDetected() const
{
return (m_StatsVarDetected.size()>0);
}
typedef struct {
std::string name;
ValueType value;
int type;
int info[5];
} adhocStruct;
BandMathXImageFilter(const Self&); //purposely not implemented
void operator=(const Self&); //purposely not implemented
void AddVariable(adhocStruct&);
void CheckImageDimensions();
void PrepareParsers();
void PrepareParsersGlobStats();
void OutputsDimensions();
std::vector<std::string> m_Expression;
std::vector< std::vector<ParserType::Pointer> > m_VParser;
std::vector< std::vector<adhocStruct> > m_AImage;
std::vector< adhocStruct > m_VVarName;
std::vector< adhocStruct > m_VAllowedVarNameAuto;
std::vector< adhocStruct > m_VAllowedVarNameAddedByUser;
std::vector< adhocStruct > m_VFinalAllowedVarName; // m_VFinalAllowedVarName = m_VAllowedVarNameAuto + m_VAllowedVarNameAddedByUser
std::vector< adhocStruct > m_VNotAllowedVarName;
std::vector< unsigned int > m_outputsDimensions;
unsigned int m_SizeNeighbourhood;
std::vector< int > m_StatsVarDetected; // input image ID for which global statistics have been detected
std::vector< unsigned int > m_NeighDetected; // input image ID for which neighbourhood have been detected
std::vector < RadiusType > m_NeighExtremaSizes;
long m_UnderflowCount;
long m_OverflowCount;
itk::Array<long> m_ThreadUnderflow;
itk::Array<long> m_ThreadOverflow;
bool m_ManyExpressions;
};
}//end namespace otb
#ifndef OTB_MANUAL_INSTANTIATION
#include "otbBandMathXImageFilter.txx"
#endif
#endif
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