Table 1.

Time complexity analysis of methods compared in Figure 9 in terms of CPU time/s.

Figures	Chan et al. method	Zhang et al. method	Jiang et al. method	Proposed method	Number of iterations
Figure 9(a)	8.39	21.22	11.45	13.45	500
Figure 9(f)	6.84	12.8	7.52	8.92	300