Table 2.
Comparison of adjacent pixels with existing cryptosystems.
| Dimension | Correlation Coefficient Directions | |||
|---|---|---|---|---|
| HC | DC | VC | ||
| Plain image | 512 × 512 | 0.9839 | 0.9773 | 0.9913 |
| Proposed | 512 × 512 | 0.0011 | 0.0037 | 0.0029 |
| Ref. [67] | 512 × 512 | 0.0075 | 0.0012 | 0.0049 |
| Ref. [68] | 512 × 512 | 0.0005 | 0.0008 | 0.0011 |
| Ref. [69] | 512 × 512 | 0.0117 | 0.0026 | 0.0010 |
| Ref. [70] | 512 × 512 | 0.0043 | 0.0054 | 0.0072 |
| Ref. [71] | 512 × 512 | 0.0108 | 0.0181 | 0.0061 |
| Ref. [72] | 512 × 512 | 0.0032 | 0.0042 | 0.0018 |
| Ref. [73] | 512 × 512 | 0.0204 | −0.0174 | 0.0231 |
| Ref. [74] | 512 × 512 | 0.0053 | −0.0027 | 0.0016 |
HC = Horizontal correlation, DC = Diagonal correlation, VC = Vertical correlation.