---

SusanFilter.hpp

#ifndef __SusanOp__
#define __SusanOp__

//                              Susan filter
//                              ========================
//
//              Group:                  Eggs and Pictures.
//              Author:                 Bernard De Cuyper
//              Date:                   10/06/2002
//
//              Purpose:                Detect edges and corners with a statistical window
//
//              Paper:                  "Susan, a new approach to low level image processing.", 
//                                              Smith & Brady, IJCV 1996.
//
//              Copyrights:             Bernard De Cuyper & Eddy Fraiha 2002,
//                                              Eggs & Pictures. 
//                                              MIT/Open BSD copyright model.
//

#include "AnImageOp.hpp"


class SusanFilter : public AnImageOp
{
private:
        
int                     width;
int                     height;

int                     maxKernelSize;          // kernel upper width
int                     maxKernelRange;         // kernel upper width
int                     nmax;

double          t;                      // minimum contrast threshold gvalue
double          g;                              // geometric threshold

AnImage*        image;

double**                r0;                     // edge detection

// statistics
double**                n0;                     // m00
double**                cgx;                    // m10 -> mu10
double**                cgy;                    // m01 -> mu01
double**                mu20;
double**                mu11;
double**                mu02;

protected:
        
void init(AnImage* im);

double distance2(int x0, int y0); // distance a cg USAN
bool isCorner(int x0, int y0);
int getBrightness(int x, int y);
int getResponse(int x, int y);

double c(int x, int y, int x0, int y0);

void computeLocalMoments(int x0,int y0);
void computeUSAN();

public:

SusanFilter(double contrast, double geometricThreshold);
SusanFilter(int kernelSize, double contrast, double geometricThreshold);

AnImage* filter(AnImage* src, AnImage* dest);
};

#endif

Restoreinpaint sourceforge project `C++/Java Image Processing, Restoration, Inpainting Project'.

Bernard De Cuyper: Open Project Leader: Concept, design and development. Bernard De Cuyper & Eddy Fraiha 2002, 2003. Bernard De Cuyper 2004. Open and free, for friendly usage only. Modifications on Belgium ground of this piece of artistic work, by governement institutions or companies, must be notified to Bernard De Cuyper.