Mat grady,intscale){intH = mask.rows, W = mask.cols;inti =0, j =0, k =0;intTH_v =6;inthead_y =-1, head_x =-1, tail_y =-1, tail_x =-1;intsig[direction_num];intlen =0, slope =0;doublegx, gy;boolflag_mask=false; ...