www.pudn.com > roadextr.rar > canny.h

 
void canny(unsigned char *image, int rows, int cols, float sigma, 
         float tlow, float thigh, unsigned char *edge);//, char *fname); 
 
void gaussian_smooth(unsigned char *image, int rows, int cols, float sigma, 
        short int **smoothedim); 
 
void gaussian_smoothImg(unsigned char *image, int rows, int cols, float sigma); 
 
void derrivative_x_y(short int *smoothedim, int rows, int cols, 
        short int **delta_x, short int **delta_y); 
 
non_max_supp(short *mag, short *gradx, short *grady, int nrows, int ncols, 
    unsigned char *result) ; 
 
void make_gaussian_kernel(float sigma, float **kernel, int *windowsize); 
 
void magnitude_x_y(short int *delta_x, short int *delta_y, int rows, int cols, 
        short int **magnitude); 
 
void apply_hysteresis(short int *mag, unsigned char *nms, int rows, int cols, 
        float tlow, float thigh, unsigned char *edge); 
 
void radian_direction(short int *delta_x, short int *delta_y, int rows, 
    int cols, float **dir_radians, int xdirtag, int ydirtag); 
 
double angle_radians(double x, double y);