Visually Meaningful Image Encryption Scheme Based on DWT and Schur Decomposition

Figure 7

Tests for the black image and white image. (a) 256  ×  256 black image. (b) 256  ×  512 black image. (c) 512 ×  512 black image. (d) Encryped image of (a). (e) Encryped image of (b). (f) Encryped image of (c). (g) 256  ×  256 white image. (h) 256 × × 512 white image. (i) 512 ×  512 white image. (j) Encryped image of (g). (k) Encryped image of (h). (l) Encryped image of (i).

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)

(i)

(j)

(k)

(l)