Research Article
A Chaotic Cryptosystem for Images Based on Henon and Arnold Cat Map
Table 9
Calculated UACI and NPCR for different combinations of
and
while
in Peppers.
| | ā | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| 1 | UACI | 5.1163 | 16.2147 | 33.4573 | 33.4727 | 33.4075 | 33.4355 | 33.4484 | 33.5372 | 33.4775 | 33.4735 | NPCR | 81.5414 | 89.1617 | 99.6342 | 99.6208 | 99.6059 | 99.6231 | 99.5930 | 99.6277 | 99.5930 | 99.6174 | 2 | UACI | 5.1163 | 16.2173 | 33.4317 | 33.4902 | 33.4462 | 33.4644 | 33.5382 | 33.4616 | 33.5023 | 33.4503 | NPCR | 81.5414 | 89.1617 | 99.6342 | 99.6208 | 99.6059 | 99.6231 | 99.5930 | 99.6277 | 99.5930 | 99.6174 | 3 | UACI | 5.1163 | 16.2191 | 33.3994 | 33.5234 | 33.4093 | 33.4373 | 33.4497 | 33.4928 | 33.5363 | 33.5198 | NPCR | 81.5414 | 89.1617 | 99.6342 | 99.6208 | 99.6059 | 99.6231 | 99.5930 | 99.6277 | 99.5930 | 99.6174 | 4 | UACI | 5.1163 | 16.2003 | 33.4263 | 33.4481 | 33.3943 | 33.4181 | 33.5062 | 33.4770 | 33.4784 | 33.5147 | NPCR | 81.5414 | 89.1617 | 99.6342 | 99.6208 | 99.6059 | 99.6231 | 99.5930 | 99.6277 | 99.5930 | 99.6174 | 5 | UACI | 5.1163 | 16.1772 | 33.4520 | 33.4995 | 33.3855 | 33.4539 | 33.4610 | 33.5291 | 33.4940 | 33.4577 | NPCR | 81.5414 | 89.1617 | 99.6342 | 99.6208 | 99.6059 | 99.6231 | 99.5930 | 99.6277 | 99.5930 | 99.6174 | 6 | UACI | 5.1163 | 16.1845 | 33.4262 | 33.5164 | 33.3721 | 33.4232 | 33.4606 | 33.5161 | 33.4626 | 33.4400 | NPCR | 81.5414 | 89.1617 | 99.6342 | 99.6208 | 99.6059 | 99.6231 | 99.5930 | 99.6277 | 99.5930 | 99.6174 | 7 | UACI | 5.1163 | 16.1885 | 33.4141 | 33.4955 | 33.4241 | 33.4615 | 33.4464 | 33.5113 | 33.4486 | 33.4434 | NPCR | 81.5414 | 89.1617 | 99.6342 | 99.6208 | 99.6059 | 99.6231 | 99.5930 | 99.6277 | 99.5930 | 99.6174 | 8 | UACI | 5.1163 | 16.1882 | 33.4694 | 33.4696 | 33.3941 | 33.4834 | 33.5019 | 33.4556 | 33.4589 | 33.5000 | NPCR | 81.5414 | 89.1617 | 99.6342 | 99.6208 | 99.6059 | 99.6231 | 99.5930 | 99.6277 | 99.5930 | 99.6174 | 9 | UACI | 5.1163 | 16.1954 | 33.4277 | 33.4527 | 33.3872 | 33.5124 | 33.4510 | 33.4750 | 33.4249 | 33.5083 | NPCR | 81.5414 | 89.1617 | 99.6342 | 99.6208 | 99.6059 | 99.6231 | 99.5930 | 99.6277 | 99.5930 | 99.6174 | 10 | UACI | 5.1163 | 16.2147 | 33.4573 | 33.4727 | 33.4075 | 33.4355 | 33.4484 | 33.5372 | 33.4775 | 33.4735 | NPCR | 81.5414 | 89.1617 | 99.6342 | 99.6208 | 99.6059 | 99.6231 | 99.5930 | 99.6277 | 99.5930 | 99.6174 |
|
|