#ifndef EDTAA3_H_HEADER_GUARD #define EDTAA3_H_HEADER_GUARD extern void computegradient(double *img, int w, int h, double *gx, double *gy); extern void edtaa3(double *img, double *gx, double *gy, int w, int h, short *distx, short *disty, double *dist); #endif // EDTAA3_H_HEADER_GUARD