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Evaluation Warning : The document was created with Spire.PDF for Python.
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I
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Vo
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10
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4
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A
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:
3
5
1
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-
3527
3520
I
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te
n
tio
n
al
attac
k
s
,
s
i
m
u
lta
n
eo
u
s
l
y
th
e
s
ig
n
i
f
ica
n
t
d
eg
r
ad
in
g
o
f
th
e
q
u
a
lit
y
o
f
th
e
v
id
eo
s
eq
u
e
n
ce
s
t
h
er
e
b
y
lo
w
er
in
g
it
s
co
m
m
er
cial
r
ate.
S
u
c
h
p
r
o
ce
s
s
es
ar
e,
f
o
r
e
x
a
m
p
le,
lo
s
s
y
co
m
p
r
es
s
io
n
,
cr
o
p
p
in
g
,
f
r
a
m
e
a
v
er
ag
i
n
g
,
s
ig
n
al
s
ad
d
itio
n
an
d
f
r
a
m
e
co
llu
s
io
n
an
d
d
r
o
p
p
in
g
.
-
C
ap
ac
it
y
:
th
e
q
u
an
tit
y
o
f
d
at
a
th
at
ca
n
b
e
ad
d
ed
to
th
e
w
ater
m
ar
k
ed
v
id
eo
is
ter
m
e
d
d
ata
p
ay
lo
ad
.
An
y
w
a
ter
m
ar
k
in
g
s
c
h
e
m
e
s
h
o
u
ld
to
ler
ate
a
co
n
v
e
n
i
en
t
a
m
o
u
n
t
o
f
d
ata
to
s
er
v
e
th
e
i
n
te
n
d
ed
ap
p
licatio
n
[
6
]
.
Vid
eo
w
ater
m
ar
k
i
n
g
h
as
s
o
m
e
is
s
u
e
s
t
h
at
ar
e
n
o
t
ex
i
s
tin
g
i
n
d
ig
i
tal
i
m
ag
e
w
a
te
r
m
ar
k
i
n
g
.
Fo
r
in
s
ta
n
ce
,
ad
d
in
g
a
s
p
ec
i
f
ic
i
m
a
g
e
w
ater
m
ar
k
to
ea
c
h
v
id
eo
f
r
a
m
e
p
r
o
d
u
ce
s
t
h
e
i
s
s
u
e
o
f
p
er
ce
p
tu
al
in
v
is
ib
ili
t
y
a
n
d
m
a
in
ta
in
i
n
g
s
t
atis
tical
[
7
]
.
I
n
g
e
n
er
al,
d
ig
ital
v
id
eo
w
a
ter
m
a
r
k
in
g
s
y
s
te
m
s
ar
e
ca
teg
o
r
ized
in
to
t
w
o
cla
s
s
es.
I
n
t
h
e
f
ir
s
t
cla
s
s
,
th
e
w
ater
m
ar
k
i
s
ad
d
ed
to
a
v
id
eo
af
ter
co
m
p
r
ess
i
n
g
w
h
ile
i
n
t
h
e
s
ec
o
n
d
cla
s
s
,
th
e
w
ater
m
ar
k
is
ad
d
ed
to
a
v
id
eo
w
ith
o
u
t u
n
co
m
p
r
es
s
i
n
g
.
Hsu
a
n
d
W
u
[
8
]
e
m
b
ed
d
ed
a
p
s
eu
d
o
-
r
an
d
o
m
n
u
m
b
er
s
e
q
u
en
ce
s
in
to
in
ter
a
n
d
in
tr
a
f
r
a
m
e
s
o
f
MP
E
G
-
1
b
y
m
ea
n
s
o
f
D
C
T
w
it
h
s
e
v
er
al
r
esid
u
al
m
as
k
s
.
W
an
g
et.
al
[
9
]
p
r
o
p
o
s
ed
v
id
eo
w
ater
m
ar
k
i
n
g
s
ch
e
m
e
o
f
lo
w
co
m
p
u
tat
io
n
co
m
p
le
x
it
y
i
n
th
e
s
p
atial
d
o
m
ai
n
.
A
n
o
n
b
li
n
d
w
ater
m
ar
k
in
g
al
g
o
r
ith
m
w
a
s
p
r
esen
ted
b
y
[
1
0
]
b
ased
o
n
w
av
e
let
tr
an
s
f
o
r
m
.
T
h
e
y
i
m
p
le
m
e
n
ted
th
e
e
m
b
ed
d
in
g
p
r
o
ce
s
s
in
th
e
f
o
u
r
s
u
b
b
an
d
s
o
f
th
e
i
n
tr
a
f
r
a
m
e
o
f
t
h
e
co
m
p
r
e
s
s
ed
MP
E
G
v
i
d
eo
.
T
h
e
au
th
o
r
s
in
[
1
1
]
ex
te
n
d
ed
th
e
p
r
o
ce
s
s
to
in
cl
u
d
e
th
e
e
m
b
ed
d
in
g
in
th
e
co
m
p
r
ess
ed
MP
E
G
-
2
a
n
d
u
n
co
m
p
r
e
s
s
ed
d
o
m
ai
n
s
.
T
h
e
alg
o
r
ith
m
p
r
o
p
o
s
ed
b
y
[
1
2
]
w
as
i
m
p
le
m
en
ted
in
t
h
e
d
is
cr
ete
co
s
in
e
tr
a
n
s
f
o
r
m
(
DC
T
)
o
f
ea
ch
f
r
a
m
e
i
n
th
e
co
m
p
r
e
s
s
ed
MP
E
G
-
2
d
o
m
ai
n
.
T
h
e
s
h
o
r
tag
e
o
f
t
h
e
p
r
esen
t
al
g
o
r
ith
m
s
;
n
e
v
er
th
les
s
,
co
n
tai
n
s
:
(
i)
T
h
e
e
m
b
ed
d
e
d
w
ater
m
ar
k
i
s
n
o
t
r
o
b
u
s
t
ag
ai
n
s
t
attac
k
s
w
h
ich
ar
e
p
ar
ticu
lar
l
y
tar
g
eted
at
v
i
d
eo
f
r
a
m
es.
(
ii)
T
h
e
w
ater
m
a
r
k
b
it
r
ate
i
s
lo
w
.
So
m
e
s
ch
e
m
e
s
e
m
p
lo
y
o
n
e
b
i
t
o
f
i
n
f
o
r
m
atio
n
as
a
w
ater
m
ar
k
[
1
3
]
.
(
iii)
T
h
e
h
i
g
h
co
m
p
u
tatio
n
al
co
m
p
lex
it
y
as
th
e
m
aj
o
r
ity
o
f
t
h
e
m
i
m
p
le
m
en
t
th
e
e
m
b
ed
d
in
g
in
th
e
tr
a
n
s
f
o
r
m
d
o
m
ai
n
.
Mo
s
t
t
h
e
e
x
is
tin
g
s
c
h
e
m
e
s
d
o
n
o
t
h
an
d
le
w
it
h
t
h
ese
i
s
s
u
es
e
f
f
ic
ien
tl
y
,
in
t
h
is
r
e
g
ar
d
,
a
n
e
w
v
id
eo
w
a
ter
m
ar
k
in
g
al
g
o
r
ith
m
is
p
r
o
p
o
s
ed
in
th
is
p
ap
er
to
h
id
e
t
h
e
w
ater
m
ar
k
in
to
th
e
co
r
r
esp
o
n
d
in
g
f
r
eq
u
en
c
y
co
m
p
o
n
e
n
ts
o
f
in
te
g
er
to
i
n
teg
er
w
av
e
let
tr
an
s
f
o
r
m
in
v
id
eo
in
tr
a
f
r
a
m
es.
I
n
teg
er
to
in
te
g
er
w
a
v
elet
tr
an
s
f
o
r
m
alg
o
r
it
h
m
s
p
r
o
v
id
e
lo
w
co
m
p
u
tatio
n
al
co
m
p
le
x
it
y
b
ec
au
s
e
t
h
i
s
tr
an
s
f
o
r
m
h
as
al
m
o
s
t
h
al
f
th
e
a
m
o
u
n
t
o
f
ca
lc
u
atio
n
s
as
co
m
p
ar
ed
to
tr
ad
ati
o
n
al
w
a
v
elet
tr
an
s
f
o
r
m
.
B
ec
au
s
e
o
f
th
is
d
ec
r
ea
s
i
n
g
i
n
th
e
co
m
p
u
tat
in
al
co
m
p
le
x
it
y
,
in
te
g
er
w
av
ele
t
s
ch
e
m
e
s
ap
p
ea
r
to
b
e
m
o
r
e
ap
p
r
o
p
r
iate
f
o
r
h
i
g
h
p
er
f
o
r
m
a
n
ce
a
p
p
licatio
n
s
an
d
f
o
r
th
e
r
ea
l
ti
m
e
p
er
o
r
m
an
ce
.
Mo
r
eo
v
er
,
p
er
f
ec
t
r
etr
eiv
in
g
o
f
t
h
e
h
id
d
en
w
ater
m
a
r
k
i
s
p
r
o
v
id
ed
b
y
in
teg
er
w
a
v
elet
tr
a
n
s
f
o
r
m
b
ec
au
s
e
t
h
eir
co
ef
f
icie
n
t
s
ar
e
in
teg
er
.
As
a
r
esu
lt,
th
e
p
er
ce
p
tu
alit
y
o
f
th
e
w
ater
m
ar
k
ed
i
m
a
g
e
is
p
er
s
er
v
ed
an
d
th
e
h
id
d
en
w
ater
m
ar
k
ca
n
b
e
s
u
cc
e
s
s
i
v
el
y
e
x
tr
ac
t
e
d
ev
e
n
w
h
e
n
t
h
e
w
a
ter
m
ar
k
ed
i
m
a
g
es
h
a
v
e
b
ee
n
s
u
b
j
ec
ted
to
cr
itical
attac
k
s
.
A
d
d
itio
n
all
y
,
th
e
i
m
p
r
o
v
ed
alg
o
r
ith
m
e
x
h
ib
it
s
s
u
p
e
r
io
r
r
o
b
u
s
tn
ess
a
g
ai
n
s
t
s
e
v
er
al
v
id
eo
p
r
o
ce
s
s
in
g
o
p
er
atio
n
s
as c
o
m
p
ar
ed
to
th
e
ex
is
t
in
g
s
c
h
e
m
es o
f
co
p
y
r
i
g
h
t p
r
o
tectio
n
.
T
h
e
ar
r
a
n
g
e
m
e
n
t
o
f
th
i
s
p
ap
er
is
as
f
o
llo
w
s
:
Sect
io
n
2
an
d
s
ec
tio
n
3
p
r
esen
t
th
e
i
n
te
g
r
al
d
ef
in
i
tio
n
ab
o
u
t
A
r
n
o
ld
tr
a
n
s
f
o
r
m
a
n
d
i
n
teg
er
w
av
e
let
tr
a
n
s
f
o
r
m
,
r
es
p
ec
tiv
el
y
.
I
n
Sectio
n
4
,
th
e
p
r
o
p
o
s
ed
alg
o
r
ith
m
is
d
escr
ib
ed
,
w
h
ile
i
n
Sect
io
n
5
ex
p
lain
s
th
e
d
etaile
s
o
f
th
e
e
x
p
er
i
m
e
n
tal
r
es
u
lt
s
.
T
h
e
co
n
cl
u
s
io
n
is
elab
o
r
ated
in
Sectio
n
6
.
2.
ARNO
L
D
T
RANSF
O
RM
An
e
f
f
icien
t
an
d
f
a
m
o
u
s
m
eth
o
d
f
o
r
i
m
ag
e
e
n
cr
y
p
tio
n
is
A
r
n
o
ld
tr
a
n
s
f
o
r
m
.
I
n
th
is
m
eth
o
d
,
ea
ch
i
m
a
g
e
is
d
e
n
o
ted
b
y
a
t
w
o
-
d
i
m
e
n
s
io
n
al
m
atr
ix
w
h
er
e
in
b
o
th
th
e
n
u
m
b
er
o
f
r
o
w
s
a
n
d
co
lu
m
n
s
p
er
f
o
r
m
th
e
p
ix
el
n
u
m
b
er
f
o
r
th
e
i
m
a
g
e
h
ei
g
h
t
an
d
w
id
th
,
r
esp
ec
ti
v
el
y
[
1
4
]
.
Fo
r
an
im
a
g
e
o
f
a
s
ize
N×
N,
th
e
g
i
v
e
n
A
r
n
o
ld
p
r
o
ce
s
s
o
f
th
e
p
ix
el
tr
a
j
ec
to
r
ies
(
x,
y
)
is
:
w
h
er
e:
n
i
s
th
e
ti
m
e
r
ep
ea
ted
o
r
iter
ativ
e
tr
an
s
f
o
r
m
a
tio
n
an
d
A
is
t
h
e
A
r
n
o
ld
tr
an
s
f
o
r
m
m
atr
i
x
.
Fig
u
r
e
1
s
h
o
w
s
t
h
e
r
es
u
lti
n
g
A
r
n
o
ld
tr
an
s
f
o
r
m
w
h
en
ap
p
lie
d
to
th
e
w
ater
m
ar
k
L
e
n
a
i
m
a
g
e.
[
′
′
]
=
[
1
1
1
2
]
[
]
,
,
{
0
,
1
,
…
,
−
1
}
(
1
)
T
h
e
A
r
n
o
ld
tr
an
s
f
o
r
m
iter
at
iv
e
ex
p
r
ess
io
n
i
s
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p
lai
n
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as f
o
llo
w
s
:
+
1
=
,
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(
,
)
=
0
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1
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…
(
2
)
T
o
r
etr
iev
e
th
e
o
r
ig
in
a
l i
m
a
g
e,
in
v
er
s
e
A
r
n
o
ld
tr
an
s
f
o
r
m
i
s
a
p
p
lied
to
th
e
tr
an
s
f
o
r
m
ed
i
m
a
g
e
[
1
5
]
.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
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p
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n
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I
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N:
2
0
8
8
-
8708
R
ev
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eo
w
a
term
a
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s
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a
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f in
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o
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er (
F
a
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d
La
yth
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la
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h
)
3521
(
a)
(
b
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Fig
u
r
e
1
.
(
a)
L
en
a
i
m
a
g
e
(
b
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t
h
e
s
cr
a
m
b
led
L
en
a
i
m
a
g
e
3.
I
NT
E
G
E
R
WAV
E
L
E
T
T
R
ANSF
O
RM
(
I
WT
)
Desp
ite
th
e
n
u
m
er
o
u
s
ad
v
an
tag
e
s
o
f
t
h
e
d
is
cr
ete
w
a
v
elet
tr
an
s
f
o
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m
in
i
m
a
g
e
p
r
o
ce
s
s
in
g
ap
p
licatio
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s
,
it
is
n
o
t
ap
p
r
o
p
r
iate
to
th
e
in
v
er
tib
le
w
at
er
m
ar
k
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n
g
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ch
e
m
e
s
as
th
e
r
ev
er
s
ib
ilit
y
is
n
o
t
ass
u
r
ed
[
1
6
]
.
No
w
,
s
u
p
p
o
s
e
a
b
lo
ck
o
f
an
i
m
ag
e
h
as
in
te
g
e
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-
v
al
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ed
p
ix
el
s
is
co
n
v
er
ted
in
to
d
is
cr
ete
w
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v
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s
f
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a
f
lo
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o
in
t
w
a
v
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tr
an
s
f
o
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m
.
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f
ch
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n
g
i
n
g
is
d
o
n
e
to
th
e
w
a
v
elet
co
ef
f
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t
s
w
h
i
le
th
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w
ater
m
ar
k
is
em
b
ed
d
ed
,
th
e
co
r
r
esp
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n
d
in
g
i
m
ag
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lo
ck
w
ith
t
h
e
w
ater
ma
rk
is
n
o
lo
n
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er
g
u
ar
an
teed
to
h
o
ld
in
te
g
er
co
m
p
o
n
e
n
ts
.
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h
e
tr
u
n
ca
t
io
n
o
f
f
lo
ati
n
g
p
o
in
t
v
a
lu
es
o
f
t
h
e
p
ix
el
s
ca
n
lead
to
l
o
s
s
o
f
i
n
f
o
r
m
atio
n
,
an
d
co
n
s
eq
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en
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y
,
t
h
e
r
ec
o
n
s
tr
u
ctio
n
o
f
t
h
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o
r
ig
in
al
w
at
er
m
a
r
k
f
r
o
m
t
h
e
w
ater
m
ar
k
e
d
i
m
ag
e
is
f
ailed
.
I
n
ad
d
itio
n
,
t
h
e
tr
ad
itio
n
a
l
w
a
v
elet
tr
an
s
f
o
r
m
is
e
m
p
lo
y
ed
as
a
f
lo
ati
n
g
p
o
in
t
d
ec
o
m
p
o
s
itio
n
f
o
llo
w
ed
b
y
a
r
o
u
n
d
in
g
as
it
ca
n
n
o
t
r
ep
r
esen
t
th
e
tr
an
s
f
o
r
m
co
ef
f
icie
n
ts
i
n
t
h
eir
f
u
ll
p
r
ec
is
io
n
:
in
f
o
r
m
a
tio
n
ca
n
th
eo
r
e
ticall
y
b
e
ch
a
n
g
ed
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u
r
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n
g
f
o
r
w
ar
d
w
it
h
i
n
v
er
s
e
p
r
o
ce
s
s
es
[
1
5
]
.
A
n
in
v
er
t
i
b
le
i
n
te
g
er
-
to
-
i
n
te
g
er
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a
v
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tr
an
s
f
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m
,
w
h
ich
i
s
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ased
o
n
lif
ti
n
g
,
is
e
m
p
lo
y
ed
in
t
h
is
wo
r
k
to
o
v
er
co
m
e
t
h
is
p
r
o
b
le
m
.
I
n
th
is
tr
a
n
s
f
o
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m
,
th
er
e
is
n
o
lo
s
s
o
f
in
f
o
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m
a
tio
n
s
i
n
ce
t
h
e
co
ef
f
icie
n
ts
ar
e
m
ap
p
ed
f
r
o
m
i
n
te
g
er
to
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d
u
r
in
g
th
e
f
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r
w
ar
d
an
d
in
v
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s
e
p
r
o
ce
s
s
es
[
1
7
]
.
A
cc
o
r
d
in
g
to
t
h
e
t
h
eo
r
etica
l
co
n
ce
p
tio
n
o
f
th
e
in
teg
er
w
a
v
elet
tr
a
n
s
f
o
r
m
p
r
ese
n
ted
b
y
[
1
8
]
,
ev
er
y
o
n
e
-
d
i
m
e
n
s
io
n
w
a
v
ele
t
tr
an
s
f
o
r
m
ca
n
b
e
d
ec
o
m
p
o
s
ed
in
to
o
n
e
o
r
m
u
lti
li
f
ti
n
g
s
ta
g
e
s
.
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lit,
p
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ed
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an
d
m
er
g
e
ar
e
t
h
e
m
ai
n
t
h
r
ee
o
p
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n
s
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o
r
a
n
y
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s
tag
e.
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li
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ar
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u
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in
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tead
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id
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n
o
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li
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r
w
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v
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n
s
f
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m
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n
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au
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o
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lit
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co
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u
tatio
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s
t
i
s
d
ec
r
ea
s
ed
to
ab
o
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t
a
h
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as c
o
m
p
ar
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th
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co
n
v
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n
tio
n
al
w
a
v
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tr
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n
s
f
o
r
m
.
3
.
1
.
A
I
m
a
g
e
deco
m
po
s
it
io
n
us
ing
a
n
inte
g
er
w
a
v
elet
t
ra
ns
f
o
r
m
T
h
e
s
p
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-
f
r
eq
u
e
n
c
y
d
o
m
a
i
n
o
f
th
e
in
te
g
er
w
a
v
elet
tr
a
n
s
f
o
r
m
h
as
th
r
ee
s
tag
e
s
:
s
p
lit,
p
r
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an
d
u
p
d
ate:
-
Sp
lit
s
ta
g
e:
an
i
m
a
g
e
is
s
p
lit
in
to
t
w
o
g
r
o
u
p
s
o
f
p
i
x
el
co
ef
f
icien
ts
:
o
d
d
an
d
e
v
e
n
[
1
9
]
.
T
h
is
p
air
o
f
co
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f
icie
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t
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ter
m
ed
th
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L
et
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(
m
,
n
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th
e
m
a
tr
ix
o
f
a
g
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v
en
i
m
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g
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th
en
:
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v
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w
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4.
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RM
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N
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4
.
1
.
Video
prepro
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s
s
ing
Fo
r
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MP
E
G
s
tr
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,
th
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f
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co
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p
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f
r
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t
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a
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I
n
t
h
is
w
o
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k
,
o
n
l
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th
e
I
–
f
r
a
m
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r
e
e
m
p
lo
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ed
to
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m
b
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th
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ar
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cr
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p
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x
it
y
o
f
t
h
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y
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m
[
4
,
2
0
]
.
T
o
o
b
tain
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f
r
a
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to
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,
B
a
n
d
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f
r
a
m
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as
d
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Fig
u
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2.
As
t
h
e
e
m
b
ed
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f
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th
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R
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t
h
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p
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ter
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ch
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in
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n
ce
co
m
p
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n
e
n
t
s
ar
e
u
n
to
u
ch
ed
[
4
]
.
Fig
u
r
e
2
.
Sp
litt
in
g
v
id
eo
s
tr
ea
m
an
d
e
m
p
lo
y
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n
g
I
W
T
o
n
I
-
f
r
a
m
es
4
.
2
.
T
he
pro
ce
du
re
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f
wa
t
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m
a
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k
e
m
bed
din
g
On
ce
t
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m
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s
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to
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r
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e
o
p
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ater
m
ar
k
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b
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in
g
is
p
er
f
o
r
m
ed
as th
e
f
o
llo
w
in
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s
tep
s
:
-
A
p
p
l
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t
h
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f
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w
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let
tr
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n
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w
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p
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5
/3
to
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r
a
m
e
o
f
s
ize
M
x
N
.
T
h
e
5
/3
in
teg
er
w
a
v
elet
tr
an
s
f
o
r
m
is
s
elec
ted
b
ec
au
s
e
it
i
s
q
u
ite
ea
s
y
to
i
m
p
le
m
e
n
t
a
n
d
p
er
m
it
s
ex
ac
t
r
ec
o
n
s
tr
u
ctio
n
o
f
t
h
e
e
m
b
e
d
d
ed
w
ater
m
ar
k
b
y
av
o
id
i
n
g
t
h
e
r
o
u
n
d
o
f
f
er
r
o
r
s
.
-
Af
ter
ap
p
l
y
i
n
g
t
h
e
i
n
te
g
er
w
a
v
elet
tr
a
n
s
f
o
r
m
,
th
e
m
a
in
f
r
a
m
e
i
s
d
i
v
id
ed
in
to
4
s
u
b
-
i
m
a
g
es
,
n
a
m
el
y
LL
,
ap
p
r
o
x
im
a
te
p
ar
a
m
eter
;
HL
,
h
o
r
izo
n
tal
d
etail
p
ar
a
m
eter
:
LH
,
v
er
tical
d
etail
p
ar
a
m
e
ter
;
HH
,
d
iag
o
n
a
l
d
etail
p
ar
am
eter
.
-
T
h
e
r
o
b
u
s
t
w
ater
m
ar
k
is
a
g
r
ey
s
ca
le
i
m
a
g
e
o
f
t
h
e
s
a
m
e
s
iz
e
of
t
h
e
co
v
er
f
r
a
m
e
s
,
i
s
s
cr
a
m
b
led
b
y
A
r
n
o
l
d
tr
an
s
f
o
r
m
.
-
T
h
e
s
cr
am
b
led
w
ater
m
ar
k
is
th
en
tr
a
n
s
f
o
r
m
ed
in
to
f
o
u
r
s
u
b
b
an
d
s
;
LL
w
,
HLw
,
LH
w
an
d
HHw
u
s
i
n
g
d
is
cr
ete
w
a
v
elet
tr
a
n
s
f
o
r
m
.
-
T
ak
in
g
i
n
to
co
n
s
id
er
atio
n
t
h
e
i
m
p
er
ce
p
tib
ilit
y
an
d
r
o
b
u
s
t
n
es
s
o
f
th
e
w
ater
m
ar
k
ed
i
m
a
g
e
,
th
e
v
er
tica
l
d
etail
s
u
b
b
an
d
;
HHw
is
c
h
o
s
en
to
b
e
e
m
b
ed
d
ed
in
th
e
lo
w
er
s
u
b
b
an
d
o
f
t
h
e
d
ec
o
m
p
o
s
ed
f
r
a
m
es
;
LL
ac
co
r
d
in
g
to
th
e
f
o
llo
w
i
n
g
eq
u
atio
n
:
=
{
+
∝
×
,
<
,
ℎ
(
6
)
w
h
er
e:
is
th
e
lo
w
er
s
u
b
b
an
d
o
f
th
e
co
v
er
f
r
a
m
e
a
f
ter
th
e
m
o
d
if
icatio
n
,
∝
: is th
e
e
m
b
ed
d
i
n
g
s
tr
en
g
h
u
s
ed
to
ad
j
u
s
t th
e
i
n
v
i
s
ib
li
y
o
f
t
h
e
w
ater
m
ar
k
ed
f
r
a
m
e,
: is th
e
e
m
b
ed
d
i
n
g
a
n
d
d
etec
tio
n
th
r
es
h
o
ld
.
-
P
er
f
o
r
m
i
n
g
in
v
er
s
e
i
n
te
g
er
w
a
v
elet
tr
an
s
f
o
r
m
o
n
,
LH
,
HL
an
d
HH
y
ield
s
t
h
e
w
ater
m
ar
k
ed
f
r
a
m
e
s
.
-
Fin
all
y
,
t
h
e
w
ater
m
ar
k
ed
v
id
e
o
s
tr
ea
m
s
ar
e
co
n
v
er
ted
b
ac
k
t
o
R
GB
f
o
r
m
at.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
n
t J
E
lec&
C
o
m
p
E
n
g
I
SS
N:
2
0
8
8
-
8708
R
ev
ers
ib
le
co
lo
r
vid
eo
w
a
term
a
r
kin
g
s
ch
eme
b
a
s
ed
o
n
h
y
b
r
id
o
f in
teg
er
-
t
o
-
i
n
teg
er (
F
a
h
a
d
La
yth
Ma
la
lla
h
)
3523
T
o
ev
alu
ate
th
e
i
m
p
er
ce
p
ti
b
ilit
y
o
f
t
h
e
w
ater
m
ar
k
ed
f
r
a
m
e
s
,
t
h
e
p
ea
k
-
s
ig
n
a
l
-
to
n
o
is
e
r
atio
(
P
S
N
R
)
[
2
1
]
is
co
n
s
id
er
ed
b
et
w
ee
n
th
e
w
ater
m
ar
k
ed
f
r
a
m
e;
F
’
an
d
t
h
e
o
r
ig
i
n
al
f
r
a
m
e;
F
as
s
tated
in
th
e
f
o
l
lo
w
i
n
g
:
=
10
10
[
×
×
(
)
2
∑
∑
(
−
′
)
2
=
1
=
1
]
(
7
)
w
h
er
e
M
,
N
: r
ep
r
esen
t
f
r
a
m
e
d
i
m
e
n
s
io
n
s
.
4
.
3
.
T
he
p
ro
ce
du
re
o
f
wa
t
er
m
a
r
k
det
ec
t
io
n
T
o
p
e
r
f
o
r
m
t
h
e
co
p
y
r
i
g
h
t
p
r
o
tectio
n
,
t
h
e
w
ater
m
ar
k
is
ex
tr
ac
ted
b
y
ap
p
l
y
i
n
g
t
h
e
i
n
v
er
s
e
p
r
o
ce
s
s
of
th
e
e
m
b
ed
d
i
n
g
s
id
e
as f
o
llo
w
s
:
-
First,
th
e
R
GB
I
f
r
am
e
s
o
f
b
o
th
th
e
o
r
ig
i
n
al
v
id
eo
an
d
th
e
wate
r
m
ar
k
ed
v
id
eo
ar
e
co
n
v
er
ted
to
YUV
co
l
o
r
co
m
p
o
n
e
n
ta
n
d
ap
p
l
y
in
g
t
h
e
f
i
r
s
t
lev
el
o
f
i
n
te
g
er
w
av
ele
t o
n
th
e
m
.
-
T
h
e
v
er
tical
s
u
b
b
an
d
o
f
t
h
e
em
b
ed
d
ed
w
a
ter
m
ar
k
is
o
b
tain
ed
b
y
ap
p
l
y
i
n
g
t
h
e
f
o
llo
w
in
g
e
q
u
atio
n
:
=
{
−
∝
<
ℎ
(
8
)
T
h
is
eq
u
atio
n
p
er
f
o
r
m
s
th
e
i
n
v
er
s
e
o
p
er
atio
n
o
f
(
6
)
-
T
h
e
o
b
tain
ed
v
er
tical
s
u
b
b
an
d
is
ad
d
ed
to
th
e
r
e
m
ai
n
in
g
s
u
b
b
an
d
s
to
g
et
th
e
g
r
e
y
s
ca
le
w
a
ter
m
ar
k
i
m
a
g
e
b
y
ap
p
l
y
i
n
g
I
DW
T
.
T
o
co
m
p
ar
e
b
et
w
ee
n
t
h
e
o
r
ig
in
al
w
ater
m
ar
k
:
W
a
n
d
th
e
r
etr
iev
ed
w
ater
m
ar
k
:
W
’
,
t
h
e
n
o
r
m
alis
ed
cr
o
s
s
-
co
r
r
elatio
n
is
co
m
p
u
ted
as f
o
llo
w
s
:
=
∑
(
)
×
′
(
)
=
1
√
∑
2
=
1
(
)
√
∑
′
2
=
1
(
)
(
9
)
5.
E
XP
E
R
I
M
E
NT
A
L
RE
SUL
T
I
n
o
r
d
er
to
p
er
f
o
r
m
th
e
tes
ti
n
g
o
f
t
h
e
p
r
o
p
o
s
ed
w
ater
m
a
r
k
in
g
s
y
s
te
m
,
it
is
ca
r
r
ied
o
u
t
o
n
t
w
o
s
tan
d
ar
d
co
lo
r
ed
v
id
eo
clip
s
.
T
h
e
f
ir
s
t
v
id
eo
is
s
h
u
ttle.a
v
e
co
m
p
o
u
n
d
s
o
f
1
2
1
f
r
a
m
es
an
d
r
ate
o
f
3
0
f
b
s
.
T
h
e
s
ec
o
n
d
v
id
eo
is
W
ild
-
li
f
e
.
av
e
co
m
p
o
u
n
d
s
o
f
7
5
0
f
r
a
m
e
s
w
h
ile
t
h
e
e
m
p
lo
y
ed
w
ater
m
ar
k
is
a
g
r
e
y
s
ca
le
i
m
a
g
e
an
d
th
e
eq
u
al
s
ize
o
f
th
e
v
id
eo
f
r
a
m
e
as
d
ep
icted
in
Fig
u
r
e
3
.
T
h
e
th
r
esh
o
ld
:
T
is
s
et
to
3
3
0
,
also
th
e
w
ater
m
ar
k
s
tr
en
g
th
k
is
0
.
0
3
.
T
h
e
g
r
ey
s
ca
le
w
a
ter
m
ar
k
i
s
s
cr
a
m
b
led
b
y
A
r
n
o
ld
t
r
an
s
f
o
r
m
p
r
io
r
th
e
e
m
b
ed
d
in
g
s
ta
g
e
as d
ep
ict
ed
in
Fig
u
r
e
1
.
As
m
e
n
tio
n
ed
i
n
s
ec
tio
n
4
,
t
h
e
P
S
N
R
i
s
e
m
p
lo
y
ed
f
o
r
th
e
i
m
p
er
ce
p
tib
ilit
y
ev
a
lu
at
io
n
a
n
d
n
o
r
m
al
is
ed
cr
o
s
s
co
r
r
elatio
n
(
NCC
)
b
et
wee
n
th
e
o
r
ig
in
al
w
a
ter
m
ar
k
an
d
th
e
r
etr
iev
ed
w
a
ter
m
ar
k
h
as
b
ee
n
e
m
p
lo
y
ed
to
ev
alu
a
te
th
e
r
o
b
u
s
t
n
ess
o
f
th
e
p
r
esen
ted
s
y
s
te
m
as
d
e
p
icted
in
(
6
)
an
d
(
8
)
,
r
esp
ec
tiv
el
y
.
T
o
p
r
o
v
e
th
e
e
f
f
ec
ti
v
en
e
s
s
o
f
th
e
p
r
o
p
o
s
ed
s
c
h
e
m
e
i
n
ter
m
s
o
f
ac
h
ie
v
ed
i
m
p
er
ce
p
tib
ilit
y
,
th
e
o
r
ig
i
n
al
an
d
w
a
ter
m
ar
k
ed
v
id
eo
f
r
a
m
e
s
ar
e
co
m
p
ar
ed
as d
ep
icted
in
T
a
b
le
1
.
Fig
u
r
e
3
.
(a
-
d
)
C
o
v
er
v
id
eo
f
r
a
m
es (
e)
w
ater
m
ar
k
i
m
ag
e
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
0
8
8
-
8708
I
n
t J
E
lec&
C
o
m
p
E
n
g
,
Vo
l.
10
,
No
.
4
,
A
u
g
u
s
t 2
0
2
0
:
3
5
1
9
-
3527
3524
T
ab
le
1
.
I
m
p
er
ce
p
tib
ilit
y
ev
al
u
atio
n
o
f
th
e
p
r
o
p
o
s
ed
s
ch
e
m
e
Or
ig
i
n
al
f
r
a
m
e
W
ater
m
ar
k
ed
f
r
a
m
e/
P
S
N
R
E
x
tr
ac
ted
w
ater
m
ar
k
/
N
C
C
PS
N
R
=
4
7
.
4
9
NCC
=1
P
S
N
R
=
4
9
.
6
2
N
C
C
=1
PS
N
R
=
5
1
.
3
2
N
C
C
=1
PS
N
R
=
4
7
.
8
2
N
C
C
=1
T
h
e
o
b
tain
ed
P
S
N
R
v
ar
ie
s
f
r
o
m
4
7
to
5
1
d
B
an
d
th
e
w
at
er
m
ar
k
ed
f
r
a
m
e
s
lo
o
k
v
i
s
ib
l
y
s
i
m
ilar
t
o
th
e
o
r
ig
i
n
al
o
n
es.
I
n
ad
d
itio
n
,
th
e
o
b
tain
ed
v
alu
e
s
o
f
N
C
C
af
ter
r
etr
iev
i
n
g
th
e
w
ater
m
ar
k
,
in
th
e
ca
s
e
o
f
n
o
attac
k
,
is
eq
u
al
to
o
n
e
w
h
ich
m
ea
n
s
t
h
at
th
e
w
ater
m
ar
k
is
co
m
p
letel
y
r
etr
ie
v
ed
.
I
n
g
en
er
al,
to
en
s
u
r
e
th
at
th
e
e
m
b
ed
d
ed
w
ater
m
ar
k
is
i
n
v
i
s
ib
le,
th
e
P
S
N
R
v
alu
e
o
f
t
h
e
w
ater
m
ar
k
ed
i
m
a
g
e
m
u
s
t
b
e
g
r
ea
ter
th
an
3
5
d
B
an
d
th
e
v
al
u
e
o
f
N
C
C
s
h
o
u
l
d
b
e
o
n
e
in
ca
s
e
o
f
n
o
at
tack
[
2
2
]
an
d
th
e
ac
ce
p
tab
le
v
alu
e
o
f
N
C
C
s
h
o
u
ld
b
e
eq
u
al
to
o
r
ab
o
v
e
0
.
7
5
[
2
3
]
.
C
o
n
s
eq
u
e
n
tl
y
,
th
e
ac
h
ie
v
ed
v
al
u
e
o
f
P
S
N
R
i
s
co
n
s
i
d
er
ed
as
r
ea
s
o
n
ab
le
an
d
h
i
g
h
.
T
o
ev
alu
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th
e
r
ig
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it
y
o
f
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h
e
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y
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te
m
f
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l
y
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s
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al
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m
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ical
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d
n
o
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ical
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ttack
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ar
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o
r
m
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.
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h
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attac
k
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ar
e
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er
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m
ed
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ea
c
h
f
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a
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o
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th
e
w
ater
m
ar
k
ed
v
id
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d
th
e
w
ater
m
ar
k
is
ex
tr
ac
t
ed
f
r
o
m
ea
c
h
v
id
eo
f
r
a
m
e.
T
h
e
o
b
tain
ed
w
ater
m
a
r
k
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t
h
e
n
co
m
p
ar
ed
w
i
th
t
h
e
o
r
ig
in
al
w
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ter
m
ar
k
an
d
N
C
C
h
a
s
b
ee
n
ca
lcu
lated
as
d
etailed
in
T
a
b
le
2
.
No
n
e
g
eo
m
etr
ic
attac
k
s
ar
e
tr
ea
ted
as
r
em
o
v
al
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k
s
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t
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to
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y
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e
m
o
v
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r
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io
r
ate
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ater
m
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r
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r
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li
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n
t.
T
h
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t
y
p
e
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n
s
f
ilter
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n
g
,
J
P
E
G
an
d
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o
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e
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s
.
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m
m
a
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tio
n
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n
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er
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en
o
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n
g
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s
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t
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r
f
r
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th
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l
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at
th
e
p
r
o
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ed
m
eth
o
d
h
as
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ig
h
r
esis
tan
ce
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in
s
t
th
e
m
en
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ed
attac
k
s
a
s
i
t
h
as
th
e
ab
ilit
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to
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etec
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th
e
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te
n
ce
o
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t
h
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e
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ed
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ed
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ater
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ar
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th
e
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er
e
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s
.
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n
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r
d
er
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d
em
o
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ate
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er
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y
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m
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ar
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e
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ed
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m
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h
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ir
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ith
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i
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DW
T
b
ased
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ater
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ar
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[
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4
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w
h
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ased
[
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.
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h
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ar
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ab
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o
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e
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it
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7
5
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2
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I
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I
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10
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4
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3527
3526
T
ab
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3
.
B
en
ch
m
ar
k
i
n
g
th
e
p
r
o
s
ed
s
ch
e
m
e
w
ith
o
t
h
er
s
A
t
t
a
c
k
s
D
W
T
[
2
4
]
L
W
T
[
2
5
]
P
r
o
p
o
se
d
a
l
g
o
r
i
t
h
m
S
a
l
t
a
n
d
P
e
p
p
e
r
0
.
7
9
0
.
8
7
0
.
9
9
G
a
u
ssi
a
n
f
i
l
t
e
r
0
.
8
8
0
.
5
1
0
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9
9
M
e
d
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a
n
f
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r
0
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8
0
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0
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9
7
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n
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8
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st
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8
9
6.
CO
NCLU
SI
O
N
I
m
p
er
ce
p
tib
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y
an
d
r
o
b
u
s
t
n
ess
ar
e
t
y
p
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y
a
tr
ad
e
o
f
f
in
v
id
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w
ater
m
ar
k
i
n
g
a
lg
o
r
ith
m
s
.
Nev
er
th
e
less
,
to
s
a
tis
f
y
b
o
th
p
ar
a
m
eter
s
,
t
h
i
s
p
ap
er
p
r
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te
d
a
s
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g
n
if
ican
t
v
id
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w
ater
m
ar
k
in
g
s
c
h
e
m
e
w
h
ic
h
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ased
o
n
co
m
b
in
a
tio
n
o
f
A
r
n
o
ld
tr
an
s
f
o
r
m
a
n
d
i
n
teg
er
w
a
v
e
let
tr
an
s
f
o
r
m
s
.
T
h
is
c
h
o
ice
p
er
m
it
s
to
o
b
tain
h
i
g
h
r
o
b
u
s
tn
es
s
to
s
ev
er
al
attac
k
s
.
I
n
ad
d
itio
n
,
to
in
cr
ea
s
e
th
e
i
m
p
er
ce
p
tib
ilit
y
o
f
t
h
e
s
y
s
te
m
,
a
la
y
er
o
f
lu
m
i
n
an
c
e
h
as
b
ee
n
s
elec
ted
f
o
r
th
e
e
m
b
ed
d
in
g
o
p
er
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n
.
Af
ter
w
ar
d
,
th
e
w
ater
m
ar
k
e
m
b
ed
d
in
g
i
s
i
m
p
le
m
e
n
ted
to
it
s
co
r
r
esp
o
n
d
in
g
co
ef
f
icie
n
ts
o
f
lif
ti
n
g
w
av
ele
t
tr
an
s
f
o
r
m
i
n
v
id
eo
I
-
f
r
a
m
e
s
.
T
h
is
s
c
h
e
m
e
p
r
eser
v
es
h
i
g
h
i
m
p
er
ce
p
tib
ilit
y
o
f
v
id
eo
f
r
a
m
es,a
s
w
ell
as,
r
e
s
u
l
ts
i
n
h
i
g
h
r
e
s
is
ta
n
ce
to
s
ev
er
al
attac
k
s
s
u
c
h
as
n
o
i
s
e
ad
d
itio
n
,
f
ilter
i
n
g
b
l
u
r
r
in
g
a
n
d
co
m
p
r
es
s
io
n
.
I
n
ad
d
itio
n
,
t
h
e
p
r
o
p
o
s
ed
s
y
s
te
m
h
a
s
o
u
tp
er
f
o
r
m
ed
th
e
ex
is
t
in
g
al
g
o
r
ith
m
s
in
ter
m
s
o
f
I
m
p
er
ce
p
tib
ilit
y
an
d
r
o
b
u
s
tn
ess
.
RE
F
E
R
E
NC
E
S
[1
]
K.
L
o
u
k
h
a
o
u
k
h
a
a
n
d
J.
-
Y.
Ch
o
u
i
n
a
rd
,
“
Hy
b
rid
w
a
t
e
r
m
a
r
k
in
g
a
lg
o
rit
h
m
b
a
se
d
o
n
S
V
D
a
n
d
li
f
ti
n
g
w
a
v
e
let
tran
sf
o
r
m
f
o
r
o
w
n
e
rsh
i
p
v
e
rif
i
c
a
t
io
n
,
”
in
I
n
p
ro
c
e
e
d
in
g
o
f
1
1
th
IE
EE
Ca
n
a
d
ia
n
W
o
rk
sh
o
p
o
n
I
n
fo
r
ma
ti
o
n
T
h
e
o
ry
,
2
0
0
9
,
n
o
.
1
,
p
p
.
1
7
7
–
1
8
2
.
[2
]
N.
H.
A
b
b
a
s,
S
.
M
u
m
ta
z
a
h
,
S
.
Ah
m
a
d
,
W
.
Az
izu
n
,
W
.
A
d
n
a
n
,
A
.
Ra
h
m
a
n
,
B.
Ra
m
li
,
a
n
d
S
.
P
a
rv
e
e
n
,
“
DWT
a
n
d
L
i
f
ti
n
g
Wav
e
let
T
ra
n
s
f
o
rm
Ba
s
e
d
Ro
b
u
st
W
a
ter
m
a
rk
in
g
f
o
r
Co
lo
r
Im
a
g
e
,
”
In
t.
Rev
.
Co
mp
u
t.
S
o
ft
w
.
,
v
o
l.
1
0
,
n
o
.
N
o
v
e
m
b
e
r,
p
p
.
1
1
2
7
–
1
1
3
3
,
2
0
1
5
.
[3
]
F
.
L
.
M
a
lallah
,
A
.
H.
A
b
d
a
lq
a
d
ir,
M
.
A
ld
a
b
b
a
g
h
,
a
n
d
A
.
W
a
is
y
,
“
Hid
in
g
S
e
c
re
t
T
e
x
t
in
sid
e
a
Dy
n
a
m
ic H
a
n
d
w
rit
ten
S
ig
n
a
tu
re
a
s
S
teg
a
n
o
g
ra
p
h
y
A
p
p
li
c
a
ti
o
n
,
”
S
c
i.
J
.
Ci
h
a
n
Un
iv.
(
S
J
CUS
),
d
x
.
d
o
i.
o
rg
/1
0
.
2
5
0
9
8
/
1
.
1
,
v
o
l.
1
,
n
o
.
1
,
2
0
1
7
.
[4
]
M
.
M
a
so
u
m
i
a
n
d
S
.
Am
iri
,
“
Co
p
y
rig
h
t
P
r
o
tec
ti
o
n
o
f
Co
l
o
r
V
i
d
e
o
Us
in
g
Dig
it
a
l
W
a
ter
m
a
rk
in
g
,
”
IJ
CS
I
In
t
.
J
.
Co
mp
u
t
.
S
c
i
.
Iss
u
e
s
,
v
o
l.
9
,
n
o
.
4
,
p
p
.
9
1
–
9
9
,
2
0
1
2
.
[5
]
E.
Ho
ss
a
in
i,
A
.
El
A
ra
b
,
M
.
El
A
ro
u
ss
i,
K.
Ja
m
a
li
,
S
.
M
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9
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.
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