1075pd00.pgm canny_edge.c canny_edge.c.doc canny_edge.dsp canny_edge.dsw canny_edge.ncb canny_edge.opt canny_edge.plg hysteresis.c pgm_io.c testing_canny.bat test_image.pgm test_image.pgm_s_1.00_l_0.50_h_0.50.pgm