DLCannyEdgeDetect.h

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#ifndef _DLCANNYEDGEDETECT_H_
#define _DLCANNYEDGEDETECT_H_

#include "DLImage.h"
#include "DLBitsPerPixelConverter.h"
#include "DLConst.h"
#include "DLTypes.h"

#include <math.h>
#include <stdio.h>

using namespace std;

#define MAGNITUDE_SCALE 7.0
#define ORIENTATION_SCALE 40.0
#define MAX_RECURSION 200

#define STANDARD_DEVIATION 1.0
#define PI 3.1415927

class DLCannyEdgeDetect
{
public:

        DLCannyEdgeDetect();

        DLCannyEdgeDetect(const DLImage& image, DL_BYTE lowT=1, DL_BYTE highT=255);

        virtual ~DLCannyEdgeDetect();

        DLImage dlGetMagnitudeImage();

        DLImage dlGetOrientationImage();

private:

        int rows;

        int cols;

        int recCounter;

        DL_BYTE *data;
    
    DL_BYTE *magnitude;

        DL_BYTE *orientation;

        void dlDetectEdge(float s, DL_BYTE lowT, DL_BYTE highT);

        void trackEdgeThreshold(DL_BYTE lowT, DL_BYTE highT);

    bool followEdge(int i, int j, DL_BYTE lowT);

        float hypotenuse(float x, float y)
        {
                if (x==0.0 && y==0.0) 
                        return 0.0;
                else
                        return (float)(hypot(x,y));
        };

        float gaussianDistribution(float x, float s) { return exp((-x*x)/(2*s*s)); };
        
};//end class

#endif //_DLCANNYEDGEDETECT_H_

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DLCannyEdgeDetectDOCLIB is an add-on module of DOCLIB. DOCLIB is being developed under contract by a collaboration between:

The Laboratory for Language and Media Processing
Unviersity of Maryland, College Park
and
Booz | Allen | Hamilton

All Rights Reserved, 2003-2007

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