Visually Meaningful Image Encryption Scheme Based on DWT and Schur Decomposition

Figure 6

The histogram test. (a) Host image of Lena. (b) Histogram of Lena. (c) Visual image of Lena. (d) Histogram of the visual image of Lena. (e) Host image of Baboon. (f) Histogram of Baboon. (g) Visual image of Baboon. (h) Histogram of the visual image of Baboon. (i) Host image of Sun. (j) Histogram of R component. (k) Histogram of G component. (l) Histogram of B component. (m) Visual image of Sun. (n) Histogram of the visual image of (R). (o) Histogram of the visual image of (G). (p) Histogram of the visual image of B.

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