Steganography in Halftone Images - Visual Cryptography and Secret Image Sharing - page 368

300

L=1
L=5
L=10
Theoretical value

250

200

150

100

50

0

0 50 100 150 200 250 300

R w- w a i y of X

FIGURE 13.25
Row-wise average intensity of W b in Y in Figure 13.24 vs row-wise average
intensity of X in Figure 13.14 (Ramp).

100

L=1
L=5
L=10
Theoretical value

80

60

40

20

0

−20

0 50 100 150 200 250 300

R w a i y of X

FIGURE 13.26
Row-wise intensity of Y in Figure 13.24 vs row-wise average intensity of X
in Figure 13.14 (Ramp).