Table 4. The UIQI for the proposed approach.

Images/size/JPEG	UIQI of the proposed approach
	Single-LSB	Single-Bit2SB	Single-Bit3SB
Thr/472*499, 21.9 KB	0.999974809	0.999903907	0.999592958
AA/459*442, 21.9 KB	0.999910199	0.999653494	0.998524767
AB/512*512, 22 KB	0.999952895	0.999812608	0.999240437
AC/512*512, 340 KB	0.999891903	0.99956814	0.998248895
Flu/348*288, 26 KB	0.999951511	0.999807683	0.999228211
Gastro/640*480, 47.1 KB	0.999973065	0.999891465	0.999576599