Visual Cryptography and Random Grids - Visual Cryptography and Secret Image Sharing - page 214

(a) (b) (c)

(d) (e) (f)

(g)

FIGURE 7.13
(See color insert.) Results of Algorithms 8 where Encrypt cVCRG (P x ,x, 4)
was based upon Algorithm 4 for VCRG-4 with respect to P (Figure 7.9(a)):
(a)R 1 , (b)R 2 , (c)R 3 , (d)R 4 ; (e)R 1 R 2 ; (f)R 1 R 2 R 3 ; (g)R 1
R 2 R 3 R 4 .