Research Article
A Chaotic Cryptosystem for Images Based on Henon and Arnold Cat Map
Table 12
Calculated UACI and NPCR for different combinations of
and
while
in Fingerprint.
| | ā | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| 1 | UACI | 0.1102 | 0.2833 | 0.2429 | 0.3697 | 0.3291 | 0.4672 | 0.6168 | 0.1744 | 0.0714 | 0.1102 | NPCR | 14.0533 | 36.1149 | 30.9715 | 47.1390 | 41.9651 | 59.5711 | 78.6449 | 22.2366 | 9.0992 | 14.0533 | 2 | UACI | 0.4539 | 1.0997 | 1.0502 | 2.0179 | 2.0101 | 4.0957 | 16.3335 | 0.4905 | 0.1923 | 0.4539 | NPCR | 71.9505 | 85.4733 | 86.7638 | 85.9703 | 84.3555 | 88.2622 | 89.8018 | 75.0031 | 49.0311 | 71.9505 | 3 | UACI | 32.7711 | 33.2829 | 23.0805 | 33.4200 | 33.3053 | 33.4104 | 33.9360 | 33.4891 | 34.1633 | 32.7711 | NPCR | 99.6140 | 99.6277 | 99.3843 | 99.6178 | 99.5754 | 99.6014 | 99.6368 | 99.6098 | 99.7284 | 99.6140 | 4 | UACI | 33.5087 | 33.4496 | 33.4820 | 33.5291 | 33.3559 | 33.4629 | 33.5104 | 33.4655 | 33.4892 | 33.5087 | NPCR | 99.6105 | 99.6220 | 99.6216 | 99.6178 | 99.6067 | 99.6181 | 99.6120 | 99.5991 | 99.6105 | 99.6105 | 5 | UACI | 33.5129 | 33.4573 | 33.4886 | 33.4295 | 33.5528 | 33.5534 | 33.4449 | 33.4749 | 33.5176 | 33.5129 | NPCR | 99.6117 | 99.6181 | 99.5953 | 99.6269 | 99.5880 | 99.6021 | 99.6094 | 99.6166 | 99.5991 | 99.6117 | 6 | UACI | 33.4461 | 33.4562 | 33.5025 | 33.5266 | 33.4495 | 33.4262 | 33.4276 | 33.4117 | 33.4122 | 33.4461 | NPCR | 99.5983 | 99.6094 | 99.6044 | 99.5956 | 99.5930 | 99.6132 | 99.6391 | 99.6204 | 99.5926 | 99.5983 | 7 | UACI | 33.3924 | 33.5282 | 33.4733 | 33.4923 | 33.5048 | 33.4279 | 33.4765 | 33.5338 | 33.4224 | 33.3924 | NPCR | 99.6265 | 99.6075 | 99.6014 | 99.6273 | 99.6212 | 99.6075 | 99.5922 | 99.6101 | 99.6155 | 99.6265 | 8 | UACI | 33.4546 | 33.4874 | 33.5073 | 33.4015 | 33.4098 | 33.4831 | 33.3897 | 33.4127 | 33.5300 | 33.4546 | NPCR | 99.6063 | 99.6025 | 99.6132 | 99.6159 | 99.6147 | 99.6292 | 99.5827 | 99.6315 | 99.5949 | 99.6063 | 9 | UACI | 33.5202 | 33.4528 | 33.5220 | 33.4781 | 33.4966 | 33.4986 | 33.4642 | 33.4896 | 33.5301 | 33.5202 | NPCR | 99.6223 | 99.6201 | 99.5995 | 99.6304 | 99.5895 | 99.6002 | 99.6078 | 99.5880 | 99.5781 | 99.6223 | 10 | UACI | 33.3561 | 33.4246 | 33.4130 | 33.4110 | 33.3838 | 33.4363 | 33.5498 | 33.4906 | 33.4433 | 33.3561 | NPCR | 99.6170 | 99.5872 | 99.5777 | 99.5884 | 99.6170 | 99.6048 | 99.5926 | 99.6140 | 99.5987 | 99.6170 |
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