/**
* @file LFonHSG.h
* @brief This class can be used to calculate the positions of keyfeatures in a Honeyrate Structure Grid (HSG). Also the class call the normal getDescriptors methode from a given type of SIFT.
* @author Eric Bach
* @date 26.10.2011
*/

#ifndef LFonHSGINCLUDE
#define LFonHSGINCLUDE

/** standard includes **/
#include <iostream>
#include <sstream>
#include <string>
#include <vector>

/** NICE includes **/
#include <core/image/Convert.h>
#include "core/vector/VectorT.h"
#include "core/vector/MatrixT.h"
#include "core/image/ImageT.h"
#include <core/basics/Config.h>
#include <core/vector/VVector.h>

/** LocalFeature*-header includes **/
#include "LocalFeatureRepresentation.h"
#include "GenericLocalFeatureSelection.h"

/** STRINGTOOLS **/
/** 1) boost **/
#ifdef NICE_USELIB_BOOST
#include <boost/tokenizer.hpp>
/** 2) NICE (standard) **/
#else
#include <core/basics/StringTools.h>
#endif

namespace OBJREC
{
class LFonHSG : public LocalFeatureRepresentation
{
    /* private member */
  private:
    /* parameter for the grid */
    //! stepwidhts of the grid
    int sampleScaling;
    //! which scales should be used
    std::string scales;
    //! vector which save the different scales
    std::vector <float> scalesV;

    /** Calculate the keypoint-positions by given imagesize, sample-spacing and scales.
        @brief The methode returns the calculated positions on a honeyrate-grid. This
        positions starts with (0;0).
        @param[in] unsigned int imageWidth  - width (x) of the given image
        @param[in] unsigned int imageHeight - heigth (y) of the given image
        @param[in,out] NICE::VVector positions    - destination for the calculated positions
    **/
    void getPositionsOnHSG ( const unsigned int imageWidth,
                             const unsigned int imageHeight,
                             NICE::VVector& positions ) const;

    //! simple methode to convert a string into float
    float strToFloat ( const std::string str ) const;

    //! if true, print some log-output
    bool debug;

    //! the descritor instanz
    LocalFeature* lf;

    /* public member */
  public:
    //! simple contructor
    LFonHSG ( const NICE::Config *conf, const std::string section = "HSG" );
    //! simple desctructor
    ~LFonHSG();

    //! Returns the descriptorsize
    int getDescSize() const {
      return lf->getDescSize();
    };

    //! Extract the descriptor-Values from a given grayscale-Image.
    int extractFeatures ( const NICE::Image & img, NICE::VVector & features, NICE::VVector & positions ) const;

    //! Extract the descriptor-Values from a given color-Image.
    int extractFeatures ( const NICE::ColorImage & cimg, NICE::VVector & features, NICE::VVector & positions ) const;

    //! Visualisierung
    void visualizeFeatures ( NICE::Image & mark, const NICE::VVector & positions, size_t color ) const;
};
}
#endif