Table 5.

Pixel correlation coefficients in three directions: horizontal (H), diagonal (D) and vertical (V) for plain images.

Original image	H	D	V
Mandrill	0.848778	0.750624	0.79088
Peppers	0.959422	0.930426	0.966795
F16	0.92752	0.868229	0.920783
Sailboat	0.952381	0.919872	0.950138
Tree	0.968153	0.929967	0.94515
Apples	0.965065	0.956994	0.986386
Average	0.9368865	0.892685	0.926689