Research Article
A New Chaos-Based Color Image Encryption Scheme with an Efficient Substitution Keystream Generation Strategy
Table 5
Correlation coefficients for neighboring pixels in the test images and their output cipher-images.
| | Test image name | Direction | Plain-image | Cipher-image | | R | G | B | R | G | B |
| | Baboon | horizontal | | | | | | | | vertical | | | | | | | | diagonal | | | | | | |
| | House | horizontal | | | | | | | | vertical | | | | | | | | diagonal | | | | | | |
| | Lena | horizontal | | | | | | | | vertical | | | | | | | | diagonal | | | | | | |
| | Peppers | horizontal | | | | | | | | vertical | | | | | | | | diagonal | | | | | | |
| | Portofino | horizontal | | | | | | | | vertical | | | | | | | | diagonal | | | | | | |
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