Table 2.

Time complexity analysis of methods compared in Figures 10 and 11 in terms of CPU time/s.

Figures	Proposed method	Zhang et al. method	Li et al. method	Chan et al. method	Number of iterations
Figure 10	24.25	41.92	32.34	11.81	500
Figure 11(a)	7.56	13.66	16.48	18.73	150
Figure 11(f)	25.77	43.52	51.69	34.94	400
Figure 11(k)	82.44	117.53	151.39	65.34	600