INNER CODE UNIT · C

df

chunquedong/mgp · core/3rd/edtaa3func.c:125

            df = 0.5*(gx + gy) - sqrt(2.0*gx*gy*a);
        } else if (a < (1.0-a1)) { // a1 <= a <= 1-a1
            df = (0.5-a)*gx;
        } else { // 1-a1 < a <= 1
            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

View source record →