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h
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er
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io
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p
r
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s
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n
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s
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to
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e
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r
ev
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w
tr
a
n
s
f
o
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m
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b
lo
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[
−
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th
e
m
i
x
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n
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n
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d
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n
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,
w
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is
th
e
tr
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s
f
o
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m
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in
D
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D.
I
n
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w
o
r
d
s
,
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o
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tain
th
e
w
ater
m
ar
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s
e
o
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ch
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y
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n
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t
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n
:
j
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T
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B
T
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T
M
B
T
W
j
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,
,
1
,
,
,
1
,
,
,
(
8
)
w
h
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e
,
,
an
d
ar
e,
r
esp
ec
tiv
el
y
,
th
e
b
lo
ck
,
th
e
D
C
T
-
2
D
tr
an
s
f
o
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m
at
io
n
,
t
h
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m
ix
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f
u
n
ctio
n
an
d
th
e
w
ater
m
ar
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b
lo
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.
T
h
e
w
a
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er
m
ar
k
i
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p
r
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s
tar
t
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=
2
,
th
e
f
ir
s
t
b
lo
ck
o
f
i
m
a
g
i
n
g
i
s
u
s
ed
f
o
r
t
h
e
w
ater
m
ar
k
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n
g
o
f
s
ec
o
n
d
b
lo
ck
.
Fig
u
r
e
3
.
P
r
in
cip
e
o
f
o
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r
m
i
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e
d
f
u
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n
m
et
h
o
d
.
P
i
is
th
e
p
ix
e
l to
be
w
ater
m
ar
k
ed
.
c
os
(
fx
+
φ
n
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is
th
s
ca
l
e
o
f
w
a
ter
m
ar
k
in
g
.
W
e
in
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t 1
i
f
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i
=
1
,
an
d
w
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in
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er
t 0
if
w
i
=
0
.
w
P
i
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wate
r
m
ar
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i
W
e
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av
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a
s
e
m
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ti
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n
(
s
e
m
i r
ev
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s
ib
le)
o
f
t
h
e
w
a
t
er
m
ar
k
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i
m
a
g
in
g
,
w
e
u
s
e
t
h
e
f
o
llo
w
i
n
g
f
o
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m
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la
w
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is
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a
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th
e
ad
d
itio
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o
f
⁄
if
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e
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ac
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b
it
eq
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al
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e
s
u
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tr
ac
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o
f
⁄
if
th
e
ex
tr
ac
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ed
b
it
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f
B
T
B
T
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B
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R
j
i
n
j
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n
f
j
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n
W
j
i
j
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n
B
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,
1
,
,
1
,
,
,
(
9
)
w
h
er
e
an
d
−
1
ar
e,
r
esp
ec
tiv
el
y
,
th
e
s
e
m
i
r
esti
t
u
ted
b
lo
ck
a
n
d
t
h
e
f
u
n
ctio
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o
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e
x
tr
ac
tio
n
w
h
ic
h
is
g
i
v
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n
i
n
eq
u
atio
n
(
6
)
.
C
o
s
(
+
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I
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r
t
1
I
n
s
e
r
t
0
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v
e
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l
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Evaluation Warning : The document was created with Spire.PDF for Python.
I
J
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C
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I
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N:
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0
8
8
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u
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4.
T
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e
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w
ater
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ar
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n
g
m
e
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s
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e
m
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I
n
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ir
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t
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etu
r
n
s
tr
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in
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y
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ir
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t
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co
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ater
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T
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I
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p
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d
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r
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b
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u
m
b
er
2
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o
n
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te
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at
th
e
p
ar
am
eter
f
mu
s
t
b
e
f
ix
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et
w
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0
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3
an
d
0
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9
.
T
h
e
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p
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n
o
f
M
is
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n
i
n
eq
u
atio
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(
6
)
an
d
Z
−
1
is
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r
etar
d
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elay
w
it
h
a
b
lo
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2
.
3
.
P
ro
po
s
ed
f
ra
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a
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kin
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m
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I
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n
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e
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s
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ater
m
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k
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r
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k
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m
ai
n
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So
,
w
e
i
n
s
er
t
th
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i
m
a
g
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e
n
tr
o
p
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,
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e
v
ar
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le
an
d
th
e
k
e
y
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T
h
e
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b
j
ec
tiv
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o
f
th
is
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o
n
d
w
ater
m
ar
k
i
n
g
ar
e:
I
n
th
e
f
ir
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t
,
h
id
e
th
e
k
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y
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d
w
h
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e
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s
ed
f
o
r
in
s
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m
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l
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ep
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m
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g
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g
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n
th
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o
n
d
,
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r
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h
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m
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g
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e
n
cr
y
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te
d
d
o
m
ai
n
ag
a
in
s
t
ta
m
p
er
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T
h
er
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o
r
e,
w
e
u
s
e
t
h
e
class
ical
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r
a
g
ile
w
ater
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ar
k
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n
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y
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te
m
w
h
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n
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i
s
ts
to
i
n
s
e
r
t th
e
w
ater
m
ar
k
in
th
e
L
S
B
b
i
ts
o
f
i
m
a
g
in
g
[
1
1
]
-
[
12
]
.
Sin
ce
,
th
er
e
ar
e
s
ev
er
al
r
esear
ch
es
t
h
at
ar
e
w
o
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k
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w
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th
t
h
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attac
k
o
f
th
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s
t
y
p
e
o
f
w
ater
m
ar
k
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n
g
as
i
n
p
ap
er
[
1
3
]
-
[
14
]
w
e
h
a
v
e
o
b
lig
ed
to
s
ec
u
r
e
th
is
m
et
h
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s
i
n
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a
n
o
v
el
p
r
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p
o
s
ed
m
et
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d
w
h
ich
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s
b
ased
o
n
th
e
ch
o
ice
o
f
p
ix
el
to
w
ater
m
ar
k
e
d
w
h
ic
h
i
s
d
o
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e
b
y
a
ch
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o
s
in
g
k
e
y
(
w
e
ca
n
u
s
e
t
h
e
en
cr
y
p
tio
n
k
e
y
)
.
T
o
n
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te
th
at
th
e
q
u
a
lit
y
i
n
P
SNR
o
f
i
m
ag
e
L
e
n
a
w
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ter
m
ar
k
ed
b
y
1
4
4
b
its
is
eq
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al
to
1
0
4
.
T
h
e
k
e
y
m
u
s
t
b
e
en
co
d
ed
in
1
6
b
its
,
ea
ch
o
f
an
d
th
e
e
n
tr
o
p
y
m
u
s
t
b
e
e
n
c
o
d
ed
in
6
4
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its
.
T
h
er
ef
o
r
e,
th
e
to
tal
b
its
w
h
ic
h
m
u
s
t
b
e
in
s
er
ted
is
eq
u
al
to
1
4
4
b
its
.
T
h
e
ex
p
r
ess
io
n
o
f
w
ater
m
ar
k
in
g
p
r
o
ce
s
s
ca
n
b
e
s
u
m
m
ar
ized
as
f
o
llo
w
s
:
1
1
8
1
2
,
,
1
N
r
e
m
i
r
e
m
i
K
C
l
M
fix
i
L
b
or
a
n
d
C
L
I
C
L
I
E
i
i
i
d
e
p
i
i
i
i
w
(
1
0
)
w
h
er
e
an
d
ar
e
th
e
s
izes
o
f
th
e
i
m
a
g
i
n
g
to
w
ater
m
ar
k
ed
,
r
esp
ec
tiv
el
y
.
an
d
,
ar
e
th
e
len
g
t
h
o
f
w
ater
m
ar
k
an
d
i
m
a
g
i
n
g
d
ep
th
,
r
esp
ec
tiv
el
y
.
an
d
th
e
in
d
ices
o
f
p
ix
el
to
w
ater
m
ar
k
ed
,
r
esp
ec
tiv
el
y
.
,
an
d
ar
e
th
e
i
m
ag
i
n
g
to
w
ater
m
ar
k
ed
,
th
e
w
ater
m
ar
k
ed
im
a
g
i
n
g
an
d
th
e
w
ater
m
ar
k
,
r
esp
ec
tiv
el
y
.
T
h
e
f
u
n
ctio
n
an
d
,
r
etu
r
n
s
th
e
i
n
te
g
er
p
ar
t
an
d
in
teg
er
d
iv
is
io
n
r
est,
r
esp
ec
tiv
el
y
.
I
n
ex
tr
ac
to
r
lev
el,
w
e
d
eter
m
in
e
t
h
e
ex
tr
ac
ted
w
ater
m
ar
k
b
y
a
s
f
o
l
lo
w
i
n
g
:
1
,
a
n
d
C
L
I
i
w
i
i
w
ex
(
1
1
)
w
h
er
e
th
e
ex
tr
ac
ted
w
ater
m
ar
k
,
th
e
e
x
p
r
ess
io
n
o
f
an
d
ar
e
g
iv
e
n
i
n
eq
u
at
io
n
(
1
0
)
.
Usi
n
g
th
e
k
e
y
,
w
e
d
eter
m
in
e
t
h
e
p
o
s
itio
n
o
f
w
ater
m
ar
k
ed
p
ix
el,
t
h
e
n
,
w
e
e
x
tr
ac
t th
e
w
a
ter
m
ar
k
.
2
.
4
.
P
ro
po
s
ed
co
m
bin
ed
e
ncry
pti
o
n/w
a
t
er
m
a
r
k
i
ng
s
che
m
a
I
n
th
is
s
ec
tio
n
,
w
e
co
m
b
i
n
e
t
h
e
t
h
r
ee
-
p
r
o
p
o
s
ed
s
y
s
te
m
:
en
cr
y
p
tio
n
s
y
s
te
m
w
it
h
t
h
e
w
at
er
m
ar
k
i
n
g
m
et
h
o
d
s
.
A
s
ill
u
s
tr
ated
i
n
Fi
g
u
r
e
5
,
th
e
m
ed
ical
i
m
ag
in
g
m
u
s
t
b
e
tr
an
s
f
o
r
m
ed
in
to
b
lo
ck
s
o
f
s
ize
8
x
8
,
f
o
r
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
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8
8
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8708
I
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C
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Vo
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No
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6
,
Dec
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er
2
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1
7
:
3
3
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–
3
3
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4
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ch
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lo
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,
w
e
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t
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p
ati
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UI
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d
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t
h
e
m
ed
ical
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m
ag
i
n
g
(
h
id
in
g
m
eth
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d
is
i
llu
s
tr
ated
i
n
Sectio
n
3
.
2
)
.
W
e
in
s
er
t
th
e
k
e
y
o
f
w
ater
m
ar
k
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n
g
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th
e
m
i
n
i
m
u
m
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al
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m
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d
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tr
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m
ag
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it
h
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e
k
e
y
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ef
o
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e
th
e
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cr
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tio
n
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s
s
w
h
ic
h
co
n
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is
t
s
to
en
cr
y
p
t
th
e
w
ater
m
ar
k
ed
i
m
a
g
e
o
n
b
lo
ck
o
f
s
ize
8
x
8
(
en
cr
y
p
tio
n
m
et
h
o
d
is
illu
s
tr
ated
in
Sectio
n
3
.
1
)
.
T
h
e
in
s
er
tio
n
o
f
th
e
k
e
y
,
an
d
t
h
e
e
n
tr
o
p
y
ar
e
ill
u
s
tr
ated
i
n
Sec
tio
n
3
.
3
.
T
h
er
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o
r
e,
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in
p
u
t
o
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o
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v
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all
E
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cr
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p
tio
n
/
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ater
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ed
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ater
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.
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tp
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ig
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m
m
a.
Fig
u
r
e
5
.
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r
o
p
o
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c
o
m
b
i
n
ed
W
ater
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ar
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u
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t
Hid
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.
2
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I
n
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tio
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s
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n
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3
.
3
.
en
cr
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s
tr
atin
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n
Sectio
n
3
.
1
.
B
in
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d
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th
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in
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y
r
ep
r
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ter
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h
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m
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ar
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OM
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we
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e
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er
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s
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a,
w
h
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iv
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n
in
p
ap
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[
1
5
]
,
as
f
o
llo
w
i
n
g
s
tep
s
:
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w
e
h
id
e
t
h
e
r
e
p
o
r
t
an
d
th
e
in
f
o
r
m
a
tio
n
o
f
p
atien
t
in
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m
ag
in
g
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s
illu
s
tr
ated
in
Sect
io
n
3
.
2
,
b
u
t,
w
it
h
o
u
t
i
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v
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s
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tr
a
n
s
f
o
r
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I
DC
T
.
b
)
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e
q
u
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t
if
y
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h
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ter
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ar
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icie
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t
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f
D
C
T
w
ith
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q
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a
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tizatio
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.
c)
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e
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n
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er
t
th
e
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tr
o
p
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o
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q
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tifie
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th
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k
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th
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n
co
d
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ater
m
ar
k
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u
an
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ied
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m
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f
f
m
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g
.
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W
e
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cr
y
p
t t
h
e
Hu
f
f
m
an
co
d
in
g
d
ata,
as ill
u
s
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ated
i
n
Sect
io
n
3
.
1
,
w
ith
1
=
0
.
3.
I
M
P
L
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M
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NT
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I
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N
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M
B
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DDED SY
ST
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3
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1
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+
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/C
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ta
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f
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n
d
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late
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f
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el
s
.
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u
r
e
6
.
Sa
m
p
les o
f
o
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r
i
m
a
g
es test set
s
.
(
a)
Mo
d
ality
M
R
i
m
ag
in
g
.
(
b
)
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d
ality
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T
im
a
g
in
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(
c)
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d
alit
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m
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d
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d
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ater
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u
r
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ig
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r
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b
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d
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f
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h
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400
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(
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F
E
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NC
E
S
[1
]
Co
n
sta
n
ti
n
e
sc
u
L
.
a
n
d
J
.
Kim
,
“
S
p
a
rk
M
e
d
:
A
F
ra
m
e
w
o
rk
f
o
r
D
y
n
a
m
ic
In
teg
r
a
ti
o
n
o
f
M
u
lt
im
e
d
ia
M
e
d
ica
l
Da
ta
in
to
Distrib
u
te
d
m
-
He
a
lt
h
S
y
ste
m
s,
”
I
EE
E
T
ra
n
sa
c
ti
o
n
s
o
n
In
f
o
rm
a
ti
o
n
T
e
c
h
n
o
lo
g
y
in
Bi
o
me
d
ici
ne
,
p
p
.
4
0
-
52
,
2
0
1
1
.
[2
]
Z
.
Qia
n
a
n
d
X
.
Zh
a
n
g
,
“
Re
v
e
rsib
le
Da
ta
Hid
in
g
in
En
c
ry
p
ted
I
m
a
g
e
s
w
it
h
Distrib
u
ted
S
o
u
rc
e
En
c
o
d
in
g
,
”
in
IEE
E
T
ra
n
sa
c
ti
o
n
s
o
n
Circ
u
it
s
a
n
d
S
y
st
e
ms
fo
r V
id
e
o
T
e
c
h
n
o
lo
g
y
,
p
p
.
1
-
13
,
2
0
1
5
.
[3
]
S
.
Z
.
C
h
a
u
d
h
a
ri,
e
t
a
l.
,
“
S
e
c
u
re
Diss
e
m
in
a
ti
o
n
a
n
d
P
ro
tec
t
io
n
o
f
M
u
lt
is
p
e
c
tral
I
m
a
g
e
s
Us
in
g
Cr
y
p
to
-
W
a
ter
m
a
rk
in
g
,
”
in
IEE
E
jo
u
rn
a
l
o
f
se
lec
ted
to
p
ics
in
a
p
p
li
e
d
e
a
rt
h
o
b
se
rv
a
ti
o
n
s
a
n
d
re
mo
te se
n
sin
g
,
p
p
.
1
-
7
,
2
0
1
5
.
[4
]
X
.
Ca
o
,
e
t
a
l.
,
“
Hig
h
Ca
p
a
c
it
y
Re
v
e
rsib
le
Da
ta
Hid
in
g
in
En
c
ry
p
ted
Im
a
g
e
s
b
y
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a
tch
-
L
e
v
e
l
S
p
a
r
se
Re
p
re
se
n
tatio
n
,
”
i
n
IE
EE
tr
a
n
sa
c
ti
o
n
s
o
n
c
y
b
e
rn
e
ti
c
s
,
p
p
.
1
-
12
,
2
0
1
5
.
[5
]
A
.
V
.
S
u
b
ra
m
a
n
y
a
m
,
e
t
a
l.
,
“
Ro
b
u
st
W
a
ter
m
a
r
k
in
g
o
f
Co
m
p
re
ss
e
d
a
n
d
En
c
ry
p
ted
JP
EG
2
0
0
0
Im
a
g
e
s,
”
in
IEE
E
tra
n
sa
c
ti
o
n
s
o
n
mu
lt
ime
d
ia
,
v
o
l
/i
ss
u
e
:
14
(
3
)
,
p
p
.
7
0
3
-
7
1
6
,
2
0
1
2
.
[6
]
D
.
Bo
u
slim
i,
e
t
a
l.
,
“
A
Jo
in
t
En
c
r
y
p
ti
o
n
/W
a
ter
m
a
r
k
in
g
S
y
ste
m
f
o
r
V
e
rify
in
g
th
e
Re
li
a
b
il
it
y
o
f
M
e
d
i
c
a
l
I
m
a
g
e
s,
”
in
IEE
E
tra
n
sa
c
ti
o
n
s
o
n
in
f
o
rm
a
ti
o
n
tec
h
n
o
l
o
g
y
in
b
io
me
d
icin
e
,
v
o
l
/i
s
su
e
:
16
(
5
)
,
p
p
.
8
9
1
-
8
9
9
,
2
0
1
2
.
[7
]
H
.
S
u
ry
a
v
a
n
sh
i,
e
t
a
l.
,
“
Dig
it
a
l
Im
a
g
e
W
a
ter
m
a
rk
in
g
in
W
a
v
e
let
Do
m
a
in
,
”
in
In
ter
n
a
ti
o
n
a
l
J
o
u
rn
a
l
o
f
El
e
c
trica
l
a
n
d
Co
m
p
u
ter
E
n
g
i
n
e
e
rin
g
(
IJ
ECE
)
,
v
ol
/i
ss
u
e
:
3
(
1
)
,
2
0
1
4
.
[8
]
N
.
S
e
th
i
a
n
d
S
.
V
ij
a
y
,
“
A
N
e
w
Cr
y
p
to
g
ra
p
h
ic
S
trate
g
y
f
o
r
Dig
it
a
l
I
m
a
g
e
s
,
”
in
In
ter
n
a
ti
o
n
a
l
J
o
u
rn
a
l
o
f
El
e
c
trica
l
a
n
d
Co
m
p
u
ter
E
n
g
i
n
e
e
rin
g
(
IJ
ECE
)
,
v
ol
/i
ss
u
e
:
4
(
3
)
,
2
0
1
4
.
[9
]
B
.
H
.
P
ra
se
ti
o
,
e
t
a
l.
,
“
Im
a
g
e
En
c
r
y
p
ti
o
n
u
sin
g
S
im
p
le
A
lg
o
rit
h
m
o
n
F
P
G
A
,
”
in
T
EL
KOM
NIKA
(
T
e
lec
o
mm
u
n
ica
ti
o
n
Co
mp
u
ti
n
g
El
e
c
tro
n
ics
a
n
d
C
o
n
tro
l)
,
v
ol
/i
ss
u
e
:
13
(
4
),
2
0
1
5
.
[1
0
]
G
.
R
.
N
.
Ku
m
a
ri
a
n
d
S
.
M
a
ru
th
u
p
e
ru
m
a
l,
“
No
r
m
a
li
z
e
d
I
m
a
g
e
Wate
r
m
a
r
k
in
g
S
c
h
e
m
e
Us
in
g
Ch
a
o
ti
c
S
y
ste
m
,
”
in
In
ter
n
a
t
io
n
a
l
J
o
u
rn
a
l
o
f
I
n
fo
rm
a
t
io
n
a
n
d
Ne
two
rk
S
e
c
u
rity (
IJ
INS
)
,
v
ol
/i
ss
u
e
:
1
(
4
),
2
0
1
2
.
[1
1
]
C
.
F
e
i,
e
t
a
l.
,
“
A
n
a
l
y
sis
a
n
d
De
sig
n
o
f
S
e
c
u
re
W
a
ter
m
a
rk
-
B
a
se
d
Au
th
e
n
ti
c
a
ti
o
n
S
y
ste
m
s,
”
in
IEE
E
t
ra
n
sa
c
ti
o
n
s
o
n
in
fo
rm
a
ti
o
n
f
o
re
n
sic
s a
n
d
se
c
u
rit
y
,
p
p
.
4
3
-
55
,
2
0
0
6
.
[1
2
]
X
.
L
i,
e
t
a
l.
,
“
Im
a
g
e
In
teg
rit
y
A
u
th
e
n
ti
c
a
ti
o
n
S
c
h
e
m
e
Ba
se
d
o
n
F
ix
e
d
P
o
i
n
t
T
h
e
o
ry
,
”
in
IEE
E
tra
n
s
a
c
ti
o
n
s
o
n
ima
g
e
p
r
o
c
e
ss
in
g
,
p
p
.
6
3
2
-
6
4
5
,
2
0
1
5
.
[1
3
]
O
.
Da
b
e
e
r,
e
t
a
l.
,
“
De
te
c
ti
o
n
o
f
Hid
in
g
i
n
th
e
L
e
a
st
S
ig
n
if
ica
n
t
Bit
,
”
in
IEE
E
tr
a
n
s
a
c
ti
o
n
s
o
n
sig
n
a
l
p
ro
c
e
ss
in
g
,
p
p
.
3
0
4
6
-
3
0
5
8
,
2
0
0
4
.
[1
4
]
Y
.
S
.
Ch
e
n
a
n
d
R
.
Z
.
W
a
n
g
,
“
S
teg
a
n
a
l
y
sis
o
f
R
e
v
e
rsib
le
Co
n
tras
t
M
a
p
p
in
g
W
a
ter
m
a
rk
in
g
,
”
i
n
IEE
E
sig
n
a
l
p
ro
c
e
ss
in
g
letter
s
,
p
p
.
1
2
5
-
1
2
8
,
2
0
0
9
.
[1
5
]
W
.
L
u
o
,
e
t
a
l
.
,
“
J
P
EG
Err
o
r
A
n
a
l
y
sis
a
n
d
Its
A
p
p
li
c
a
ti
o
n
s
to
Di
g
it
a
l
Im
a
g
e
F
o
re
n
sic
s,
”
in
IEE
E
tra
n
sa
c
ti
o
n
s
o
n
in
fo
rm
a
ti
o
n
f
o
re
n
sic
s a
n
d
se
c
u
rit
y
,
p
p
.
4
8
0
-
4
9
1
,
2
0
1
0
.
[1
6
]
B
.
L
e
i,
e
t
a
l.
,
“
Re
v
e
rsib
le
w
a
t
e
r
m
a
rk
in
g
sc
h
e
m
e
f
o
r
m
e
d
ica
l
i
m
a
g
e
b
a
s
e
d
o
n
d
if
fe
re
n
ti
a
l
e
v
o
l
u
ti
o
n
,
”
in
EL
S
EV
IE
R
Exp
e
rt S
y
ste
ms
wit
h
A
p
p
l
ica
ti
o
n
s
,
pp.
3
1
7
8
–
3
1
8
8
,
2
0
1
4
.
[1
7
]
R
.
Esw
a
ra
iah
a
n
d
E
.
S
.
Re
d
d
y
,
“
Ro
b
u
st
m
e
d
ica
l
ima
g
e
w
a
t
e
r
m
a
r
k
in
g
tec
h
n
iq
u
e
f
o
r
a
c
c
u
ra
te
d
e
tec
ti
o
n
o
f
tam
p
e
rs
in
sid
e
re
g
io
n
o
f
in
tere
st an
d
re
c
o
v
e
rin
g
o
rig
in
a
l
re
g
io
n
o
f
in
tere
st,
”
i
n
IET
Ima
g
e
Pro
c
e
ss
in
g
,
p
p
.
6
1
5
–
6
2
5
,
2
0
1
5
.
[1
8
]
G
.
Co
a
tri
e
u
x
,
e
t
a
l.
,
“
A
W
a
ter
m
a
rk
in
g
Ba
se
d
M
e
d
ica
l
I
m
a
g
e
I
n
teg
rit
y
Co
n
tro
l
S
y
ste
m
a
n
d
a
n
Im
a
g
e
M
o
m
e
n
t
S
ig
n
a
tu
re
f
o
r
T
a
m
p
e
rin
g
Ch
a
ra
c
t
e
riza
ti
o
n
,
”
in
IEE
E
tra
n
s
a
c
ti
o
n
s
o
n
i
n
f
o
rm
a
ti
o
n
tec
h
n
o
l
o
g
y
in
b
io
me
d
icin
e
,
p
p
.
1
-
11
,
2
0
1
3
.
[1
9
]
A
.
Al
-
Ha
j,
e
t
a
l.
,
”
Cr
y
p
to
-
b
a
se
d
a
lg
o
rit
h
m
s
f
o
r
s
e
c
u
re
d
m
e
d
ica
l
i
m
a
g
e
tran
s
m
issio
n
,
”
in
IET
In
fo
r
ma
ti
o
n
S
e
c
u
rity
,
p
p
.
3
6
5
–
3
7
3
,
2
0
1
5
.
[2
0
]
E
.
W
a
li
a
a
n
d
A
.
S
u
n
e
ja,
“
F
ra
g
il
e
a
n
d
b
li
n
d
w
a
ter
m
a
rk
in
g
tec
h
n
iq
u
e
b
a
se
d
o
n
W
e
b
e
r’s
law
f
o
r
m
e
d
ica
l
im
a
g
e
a
u
th
e
n
ti
c
a
ti
o
n
,
”
i
n
IE
T
Co
m
p
u
ter
Vi
sio
n
,
p
p
.
9
–
19
,
2
0
1
3
.
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