Research Article
Image Encryption Algorithm Based on a Novel Improper Fractional-Order Attractor and a Wavelet Function Map
Table 1
Correlation coefficient of different plain image and cipher image.
| | Plain image | Horizontal | Vertical | Diagonal | Counterdiagonal |
| | Gray Lena | | | Plain image | 0.972953 | 0.970462 | 0.916925 | 0.938441 | | Encrypted image | −4.097226 × 10−5 | 1.158832 × 10−4 | 4.620716 × 10−5 | 4.539076 × 10−4 | | Encrypted image [19] | 0.000417 | −0.002048 | −0.001554 | | | Encrypted image [20] | 0.023 | 0.028 | 0.023 | |
| | Binary image | | | Plain image | 0.915352 | 0.922622291 | 0.868221 | 0.857255 | | Encrypted image | −3.811868 × 10−6 | −7.131676 × 10−4 | −9.372164 × 10−4 | −3.496642 × 10−4 |
| | Color parrot | | | | | | R | | | | | | Plain image | 0.945140 | 0.950725 | 0.919702 | 0.937272 | | Encrypted image | −0.001678 | 3.514572 × 10−4 | −9.329940 × 10−4 | −4.626904 × 10−5 | | G | | | | | | Plain image | 0.948746 | 0.941403 | 0.910118 | 0.929873 | | Encrypted image | −8.326210 × 10−4 | −4.626904 × 10−5 | 1.484844 × 10−5 | 6.479456 × 10−4 | | B | | | | | | Plain image | 0.956960 | 0.924891 | 0.924891 | 0.941023 | | Encrypted image | −7.902728 × 10−6 | 1.1520873 × 10−4 | 9.66501 × 10−4 | −1.766560 × 10−4 |
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