Table 8 Performance comparison.
Schemes | Entropy | NPCR (%) | UACI (%) | Correlation coefficient | ||
|---|---|---|---|---|---|---|
Horizontal | Vertical | Diagonal | ||||
Our scheme | 7.9970 | 99.6429 | 33.5058 | 0.0023 | 0.0109 | 0.0083 |
Ref.44 | 7.9897 | 99.6093 | 33.4635 | 0.0073 | 0.0115 | − 0.0012 |
Ref.45 | 7.9969 | 99.6139 | 33.4864 | 0.0022 | 0.0029 | 0.0049 |
Ref.46 | 7.9967 | 99.62 | 33.48 | 0.0004 | − 0.0006 | − 0.0093 |
Ref.47 | 7.9965 | 99.6170 | 33.3918 | 0.0029 | 0.0080 | − 0.0003 |
Ref.48 | 7.9914 | 99.6060 | 33.4689 | − 0.0016 | 0.000279 | 0.000627 |
