Table 5. Plain-image sensitivity test at different positions of the image

Position	NPCR (%)	UACI (%)
(0,0)	99.600220	33.382053
(40,70)	99.630737	33.416492
(80,35)	99.601746	33.419903
(128,128)	99.610901	33.490643
(190,220)	99.606323	33.452763
(255,255)	99.607849	33.395039
Average values	99.609629	33.426148