197383.fig.002a
(a)  4-point
197383.fig.002b
(b) 4-point
197383.fig.002c
(c) 4-point
197383.fig.002d
(d) 6-point
197383.fig.002e
(e) 6-point
Figure 2: Comparison: bold solid continuous curves are generated by proposed 4-point and 6-point ternary approximating schemes (a) Ko et al. [7] and proposed 4-point ternary schemes (b) [5, 9] and proposed 4-point ternary scheme (c) Hassan and Dodgson [1] and proposed 4-point ternary schemes (d) [5, 9] and proposed 6-point ternary scheme (e) Khan and mustafa [6] and proposed 6-point ternary schemes.