Table 3 Correlation coefficients in R, G, B channels
From: Fractional-order 4D hyperchaotic memristive system and application in color image encryption
Channels | Direction | Original Lena image | Our Algorithm | Ref [12] | Ref [20] |
|---|---|---|---|---|---|
R channel | Horizontal | 0.9556 | − 0.0025 | 0.0032 | 0.0031 |
Vertical | 0.9780 | 0.0913 | 0.0058 | − 0.0009 | |
Diagonal | 0.9434 | 0.0011 | 0.0133 | 0.0027 | |
G channel | Horizontal | 0.9443 | 0.0058 | 0.0068 | − 0.0018 |
Vertical | 0.9711 | − 0.0372 | 0.0042 | 0.0079 | |
Diagonal | 0.9301 | − 0.0014 | 0.0130 | − 0.0002 | |
B channel | Horizontal | 0.9280 | − 0.0058 | 0.0014 | 0.0033 |
Vertical | 0.9575 | 0.0036 | 0.0035 | − 0.0049 | |
Diagonal | 0.9030 | 2.1180e-04 | 0.0091 | 0.0015 |