Research Article

A Simple and Robust Gray Image Encryption Scheme Using Chaotic Logistic Map and Artificial Neural Network

Figure 5

Histogram analysis: frames (a) and (b) show a plain image “Lenna” and its corresponding cipher image, respectively. Frames (c) and (d) show histograms of images shown in frames (a) and (b), respectively.
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(b)
(c)
(d)