A New One-Dimensional Chaotic Map and Its Use in a Novel Real-Time Image Encryption Scheme

Figure 10

Correlation of adjacent pixels from Lena plain/encrypted image.

(a) 𝜌_{𝑅,𝐺,𝐵}=(0.987236,0.984582,0.892154). Correlation of horizontally adjacent pixels in the original image

(b) 𝜌_{𝑅,𝐺,𝐵}=(−0.006287,−0.011931,0.010345). Correlation of horizontally adjacent pixels in the encrypted image

(c) 𝜌_{𝑅,𝐺,𝐵}=(0.994571,0.989945,0.926648). Correlation of vertically adjacent pixels in the original image

(d) 𝜌_{𝑅,𝐺,𝐵}=(−0.005440,−0.025048,−0.008955). Correlation of vertically adjacent pixels in the encrypted image

(e) 𝜌_{𝑅,𝐺,𝐵}=(0.984270,0.981644,0.889881). Correlation of diagonally adjacent pixels in the original image

(f) 𝜌_{𝑅,𝐺,𝐵}=(0.005888,−0.007541,−0.010945).  Correlation of diagonally adjacent pixels in the encrypted image