gdal_simplesurf.h

Go to the documentation of this file.

/******************************************************************************
 * $Id$
 * Project:  GDAL
 * Purpose:  Correlator
 * Author:   Andrew Migal, migal.drew@gmail.com
 *
 ******************************************************************************
 * Copyright (c) 2012, Andrew Migal
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 ****************************************************************************/
 
#ifndef GDALSIMPLESURF_H_
#define GDALSIMPLESURF_H_
 
#include "gdal_priv.h"
#include "cpl_conv.h"
#include <list>
 
class GDALFeaturePoint
{
  public:
    GDALFeaturePoint();
 
    GDALFeaturePoint(const GDALFeaturePoint &fp);
 
    GDALFeaturePoint(int nX, int nY, int nScale, int nRadius, int nSign);
    virtual ~GDALFeaturePoint();
 
    GDALFeaturePoint &operator=(const GDALFeaturePoint &point);
 
    double &operator[](int nIndex);
 
    static const int DESC_SIZE = 64;
 
    int GetX() const;
 
    void SetX(int nX);
 
    int GetY() const;
 
    void SetY(int nY);
 
    int GetScale() const;
 
    void SetScale(int nScale);
 
    int GetRadius() const;
 
    void SetRadius(int nRadius);
 
    int GetSign() const;
 
    void SetSign(int nSign);
 
  private:
    // Coordinates of point in image
    int nX;
    int nY;
    // --------------------
    int nScale;
    int nRadius;
    int nSign;
    // Descriptor array
    double *padfDescriptor;
};
 
class GDALIntegralImage
{
    CPL_DISALLOW_COPY_ASSIGN(GDALIntegralImage)
 
  public:
    GDALIntegralImage();
    virtual ~GDALIntegralImage();
 
    void Initialize(const double **padfImg, int nHeight, int nWidth);
 
    double GetValue(int nRow, int nCol);
 
    double GetRectangleSum(int nRow, int nCol, int nWidth, int nHeight);
 
    double HaarWavelet_X(int nRow, int nCol, int nSize);
 
    double HaarWavelet_Y(int nRow, int nCol, int nSize);
 
    int GetHeight();
 
    int GetWidth();
 
  private:
    double **pMatrix = nullptr;
    int nWidth = 0;
    int nHeight = 0;
};
 
class GDALOctaveLayer
{
    CPL_DISALLOW_COPY_ASSIGN(GDALOctaveLayer)
 
  public:
    GDALOctaveLayer();
 
    GDALOctaveLayer(int nOctave, int nInterval);
    virtual ~GDALOctaveLayer();
 
    void ComputeLayer(GDALIntegralImage *poImg);
 
    int octaveNum;
    int filterSize;
    int radius;
    int scale;
    int width;
    int height;
    double **detHessians;
    int **signs;
};
 
class GDALOctaveMap
{
    CPL_DISALLOW_COPY_ASSIGN(GDALOctaveMap)
 
  public:
    GDALOctaveMap(int nOctaveStart, int nOctaveEnd);
    virtual ~GDALOctaveMap();
 
    void ComputeMap(GDALIntegralImage *poImg);
 
    static bool PointIsExtremum(int row, int col, GDALOctaveLayer *bot,
                                GDALOctaveLayer *mid, GDALOctaveLayer *top,
                                double threshold);
 
    GDALOctaveLayer ***pMap;
 
    static const int INTERVALS = 4;
 
    int octaveStart;
 
    int octaveEnd;
};
 
class GDALSimpleSURF
{
  private:
    class MatchedPointPairInfo
    {
      public:
        MatchedPointPairInfo(int nInd_1, int nInd_2, double dfDist)
            : ind_1(nInd_1), ind_2(nInd_2), euclideanDist(dfDist)
        {
        }
 
        int ind_1;
        int ind_2;
        double euclideanDist;
    };
 
    CPL_DISALLOW_COPY_ASSIGN(GDALSimpleSURF)
 
  public:
    GDALSimpleSURF(int nOctaveStart, int nOctaveEnd);
    virtual ~GDALSimpleSURF();
 
    static CPLErr ConvertRGBToLuminosity(GDALRasterBand *red,
                                         GDALRasterBand *green,
                                         GDALRasterBand *blue, int nXSize,
                                         int nYSize, double **padfImg,
                                         int nHeight, int nWidth);
 
    std::vector<GDALFeaturePoint> *
    ExtractFeaturePoints(GDALIntegralImage *poImg, double dfThreshold);
 
    static CPLErr
    MatchFeaturePoints(std::vector<GDALFeaturePoint *> *poMatchPairs,
                       std::vector<GDALFeaturePoint> *poFirstCollect,
                       std::vector<GDALFeaturePoint> *poSecondCollect,
                       double dfThreshold);
 
  private:
    static double GetEuclideanDistance(GDALFeaturePoint &firstPoint,
                                       GDALFeaturePoint &secondPoint);
 
    static void NormalizeDistances(std::list<MatchedPointPairInfo> *poList);
 
    static void SetDescriptor(GDALFeaturePoint *poPoint,
                              GDALIntegralImage *poImg);
 
  private:
    int octaveStart;
    int octaveEnd;
    GDALOctaveMap *poOctMap;
};
 
#endif /* GDALSIMPLESURF_H_ */