INNER CODE UNIT · C

df

chunquedong/mgp · core/3rd/edtaa3func.c:129

            df = -0.5*(gx + gy) + sqrt(2.0*gx*gy*(1.0-a));
        }
    }
    return df;
}

double distaa3(double *img, double *gximg, double *gyimg, int w, int c, int xc, int yc, int xi, int yi)
{
    double di, df, dx, dy, gx, gy, a;
    int closest;

    closest = c-xc-yc*w; // Index to the edge pixel pointed to from c
    a = img[closest];    // Grayscale value at the edge pixel
    gx = gximg[closest]; // X gradient component at the edge pixel
    gy = gyimg[closest]; // Y gradient component at the edge pixel

    if(a > 1.0) a = 1.0;
    if(a < 0.0) a = 0.0; // Clip grayscale values outside the range [0,1]

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