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Table 5 NPCR and UACI p values

From: Periodic characteristics of the Josephus ring and its application in image scrambling

Item NPCR(%) UACI (%) p-value Size
Test image
Cameraman 99.5620 31.1169 0.0261 256 × 256 × 1
Scrambled cameraman 99.6185 31.1317 0.0127 256 × 256 × 1
Lena 99.5788 33.8519 0.0452 256 × 256 × 1
Scrambled Lena 99.6093 34.0460 0.0440 256 × 256 × 1
Couple 99.6078 32.8495 0.0750 256 × 256 × 1
Scrambled couple 99.6643 33.0188 0.0279 256 × 256 × 1
Boat 99.5937 29.3294 0.0466 512 × 512 × 1
Scrambled boat 99.6154 29.3675 0.0218 512 × 512 × 1
Baboon 99.6063 27.7792 0.1011 512 × 512 × 1
Scrambled baboon 99.6234 27.8718 0.0366 512 × 512 × 1
Town 99.6055 29.1728 0.0770 512 × 512 × 1
Scrambled town 99.6174 29.2275 0.0478 512 × 512 × 1
Barbara 99.6189 28.8729 0.0832 512 × 512 × 1
Scrambled barbara 99.6310 28.8842 0.0470 512 × 512 × 1
Peppers 99.6143 30.9129 0.0658 512 × 512 × 1
Scrambled peppers 99.6325 30.9247 0.0412 512 × 512 × 1