A Hidden Chaotic Attractor with an Independent Amplitude-Frequency Controller

Figure 11

Correlation and autocorrelation of B channel adjacent pixels of the pepper image and its ciphered image: (a) horizontal direction of the pepper image; (b) vertical direction of the pepper image; (c) diagonal direction of the pepper image; (d) horizontal direction of the pepper ciphered image; (e) vertical direction of the pepper ciphered image; (f) diagonal direction of the pepper ciphered image.