Chamfer2D_3x3.h

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#ifndef Chamfer2D_3x3_h
#define Chamfer2D_3x3_h

#include "DistanceTransform.h"
//----------------------------------------------------------------------
class Chamfer2D_3x3 : public DistanceTransform {

public:
    Chamfer2D_3x3 ( const int xSize, const int ySize, const bool unload=true )
        : DistanceTransform(xSize, ySize, unload)
    {
    }

    void doTransform ( const unsigned char* const I ) {
        doTransform(I, 3, 3, 4, true);  //or (2,3)
    }

    void doTransform ( const unsigned char* const I, const int dx,
                       const int dy, const int dxy,
                       const bool halfIsZero );

    int iterateTransform ( const unsigned char* const I ) {
        return iterateTransform(I, 3, 3, 4, true);  //or (2,3)
    }

    int iterateTransform ( const unsigned char* const I, const int dx,
                       const int dy, const int dxy,
                       const bool halfIsZero );

    template <class T>
        inline bool check2 ( T* d, const int center, const int X, const int Y,
                             const T Delta ) {
            const int Near     = sub(X,Y);
            const T   possible = d[Near] + Delta;
            if (possible < d[center]) {
                d[center] = possible;
                return true;
            }
            return false;  //nothing changed
    }

};

#endif
//----------------------------------------------------------------------

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