Cryptography Reference
In-Depth Information
FIGURE 11.4
The regions of deviation (d
x
;d
y
) that can recover the secret image.
TABLE 11.3
The properties of the misaligned schemes.
regions
R
1
R
2
R
3
(sd
x
)(sd
y
)
> s
2
=2
0 d
x
;d
y
< s
(d
x
;d
y
)
satisfy
0 d
x
< 2s=3
0 d
y
< s
2s=3 < d
x
s
0 d
y
< s
misaligned
scheme
DV CS
PV CS
DV CS
R
1
=
s
2
2(d
x
+d
y
)s+2d
x
d
y
2s
2
R
2
=
(2s3d
x
)(sd
y
)
4s
2
R
3
=
(3d
x
2s)(sd
y
)
4s
2
contrast
recovered
secretimage
original
color
original
color
complementary
color
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