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pt
o
gr
a
p
h
y
;
t
h
i
s
i
n
f
o
r
m
a
t
i
o
n
is
ge
n
e
ra
l
l
y
un
de
r
s
t
o
o
d
as
c
o
d
e
d
da
t
a
t
ha
t
a
ppe
a
r
s
n
o
n
s
e
n
s
i
c
a
l
.
B
a
s
i
c
a
l
l
y
,
s
t
e
ga
n
o
gra
p
h
y
is
i
n
f
o
r
m
a
t
i
o
n
hi
d
i
n
g,
w
h
i
c
h
c
a
nn
o
t
be
i
de
n
t
i
f
i
e
d
as
t
h
e
c
o
de
d
i
n
f
o
r
m
a
t
i
o
n
s
e
e
m
s
to
be
a
b
n
o
r
m
a
l
in
i
t
s
p
r
e
s
e
n
c
e
by
s
i
ght
a
nd
u
n
de
t
e
c
t
a
b
l
e
.
F
u
rt
h
e
r
m
o
r
e
,
s
t
e
ga
n
o
g
ra
p
h
y
de
t
e
c
t
i
o
n
is
na
m
e
d
s
t
e
ga
na
l
y
s
i
s
.
M
o
r
e
ov
e
r
,
s
t
e
ga
n
o
gra
p
h
y
is
o
n
e
of
t
h
e
po
w
e
r
f
ul
t
e
c
hn
i
q
ue
s
us
e
d
to
h
i
de
a
s
e
c
r
e
t
i
m
a
ge
,
a
udi
o
f
i
l
e
s
,
a
n
d
v
i
de
o
s
so
t
h
a
t
no
o
n
e
c
a
n
f
i
n
d
a
s
e
c
r
e
t
h
i
dde
n
i
m
a
ge
in
a
n
o
t
h
e
r
o
n
e
.
B
e
s
i
de
s
,
s
t
e
ga
n
o
gra
p
h
y
i
m
a
ge
r
e
f
e
r
s
to
h
i
di
n
g
in
a
n
o
t
h
e
r
i
m
a
ge
or
v
i
de
o
f
i
l
e
i
n
f
o
r
m
a
t
i
o
n
(i
.
e
.
,
t
e
xt
m
e
s
s
a
ge
s
,
i
m
a
ge
s
,
or
a
u
di
o
f
i
l
e
s
(
a
nd
by
pr
o
pe
r
de
c
o
di
n
g
t
e
c
hn
i
q
ue
,
t
h
i
s
hi
dde
n
i
n
f
o
r
m
a
t
i
o
n
can
be
r
e
t
ri
e
v
e
d.
T
h
e
r
e
f
or
e
,
s
t
e
ga
n
o
g
r
a
p
h
y
is
de
f
i
n
e
d
as
“
t
h
e
a
r
t
of
h
i
d
i
n
g
da
t
a
m
e
di
a
f
i
l
e
s
”
,
w
hi
c
h
m
e
a
n
s
t
h
e
w
a
y
of
h
i
di
n
g
a
n
y
m
e
s
s
a
ge
(e
.
g.
,
t
e
xt
,
i
m
a
ge
,
a
udi
o
,
e
t
c
.
)
in
a
n
y
f
i
l
e
(
e
.
g.
,
.
m
p
3,
w
a
v
or
.
p
n
g)
[3
,
4]
.
In
t
h
e
l
i
t
e
ra
t
u
r
e
,
t
h
e
r
e
a
r
e
s
e
v
e
r
a
l
m
e
t
h
o
ds
of
s
t
e
ga
n
o
gr
a
p
h
y
pe
r
fo
r
m
a
n
c
e
;
h
o
w
e
ve
r
,
t
h
e
L
e
a
s
t
S
i
g
n
i
f
i
c
a
n
t
B
i
t
(L
S
B
)
is
c
o
n
s
i
de
r
e
d
a
s
t
h
e
m
o
s
t
f
a
m
o
us
o
n
e
.
T
hi
s
is
m
a
i
nl
y
be
c
a
us
e
t
h
e
r
e
a
r
e
t
hr
e
e
c
o
m
po
n
e
nt
s
in
e
a
c
h
c
o
l
o
r
i
m
a
ge
;
t
hi
s
pi
xe
l
d
a
t
a
is
s
a
v
e
d
in
o
n
e
by
t
e
in
an
e
n
c
o
de
d
fo
r
m
a
t
.
It
is
po
s
s
i
b
l
e
to
m
o
di
fy
t
h
e
l
o
w
b
i
t
s
t
ha
t
c
o
nt
a
i
n
l
i
t
t
l
e
i
n
f
o
r
m
a
t
i
o
n
for
e
a
c
h
pi
xe
l
to
s
t
o
r
e
t
h
e
h
i
d
de
n
t
e
xt
.
T
h
e
pr
e
c
o
n
di
t
i
o
n
for
t
h
e
s
t
o
r
e
d
t
e
xt
t
ha
t
it
m
us
t
be
s
m
a
l
l
e
r
or
e
qua
l
to
t
h
e
i
m
a
ge
t
h
a
t
is
us
e
d
to
h
i
de
t
h
e
t
e
xt
.
T
h
e
r
e
a
r
e
t
w
o
di
ff
e
r
e
n
t
i
m
a
ge
s
t
e
g
a
n
o
gra
p
h
y
m
e
t
h
o
ds
:
a)
M
e
t
h
o
ds
of
s
pa
c
e
.
b)
T
r
a
n
s
f
o
r
m
m
e
t
h
o
ds
:
L
S
B
m
e
t
h
o
d
is
t
h
e
m
o
s
t
c
o
m
m
o
n
m
e
t
h
o
d
us
e
d
in
t
h
e
s
pa
t
i
a
l
s
ub
s
t
i
t
ut
i
o
n
m
e
t
h
o
d.
c)
R
e
t
r
i
e
v
e
t
h
e
m
e
s
s
a
ge
i
m
a
ge
s
f
r
o
m
r
e
c
o
m
b
i
n
i
n
g
t
h
e
l
o
w
e
r
f
our
-
b
i
t
p
l
a
n
e
s
.
T
h
e
i
m
a
ge
p
i
xe
l
s
a
r
e
a
s
s
i
g
n
e
d
to
be
s
t
o
r
e
d
in
t
h
e
f
o
r
m
of
b
i
t
s
.
T
h
e
i
n
t
e
n
s
i
t
y
of
pi
xe
l
s
is
s
t
o
r
e
d
in
an
8
-
b
i
t
(i
.
e
.
,
1
by
t
e
)
i
m
a
ge
on
a
gra
y
s
c
a
l
e
.
S
i
m
i
l
a
r
l
y
,
e
a
c
h
pi
xe
l
r
e
qui
r
e
s
24
b
i
t
s
(8
b
i
t
s
fo
r
e
a
c
h
l
a
y
e
r
)
fo
r
c
o
l
o
r
(r
e
d
,
g
r
e
e
n
,
a
n
d
b
l
ue
(R
G
B
))
i
m
a
ge
s
.
W
h
e
n
t
h
e
L
S
B
b
i
t
is
m
o
di
f
i
e
d,
t
h
e
H
um
a
n
V
i
s
ua
l
S
y
s
t
e
m
(H
V
S
)
is
una
b
l
e
to
de
t
e
c
t
t
h
e
s
e
c
ha
n
ge
s
in
pi
xe
l
s
’
i
nt
e
n
s
i
t
y
or
c
o
l
o
r
.
T
h
i
s
is
o
b
s
c
ur
e
v
i
s
ua
l
r
e
du
n
d
a
n
c
y
,
w
h
i
c
h
can
be
us
e
d
to
h
i
de
i
n
f
o
r
m
a
t
i
o
n
in
t
h
e
s
e
b
i
t
s
w
i
t
h
no
s
i
g
n
i
f
i
c
a
n
t
d
i
f
fe
r
e
n
c
e
is
o
b
s
e
r
v
e
d
in
t
h
e
i
m
a
ge
.
A
c
c
o
r
di
n
g
l
y
,
it
is
po
s
s
i
b
l
e
to
m
o
di
fy
t
h
e
f
i
r
s
t
b
i
t
s
to
c
a
rr
y
t
h
e
i
n
f
o
r
m
a
t
i
o
n
to
s
t
o
r
e
a
hi
dde
n
t
e
xt
in
e
a
c
h
p
i
xe
l
or
a
pi
c
t
u
r
e
(s
e
e
F
i
gu
r
e
1)
.
By
r
e
pl
a
c
i
n
g
t
h
e
LS
B
in
a
B
M
P
t
y
pe
pi
c
t
ur
e
,
it
e
m
b
e
ds
da
t
a
i
n
t
o
t
h
e
p
h
o
t
o
[1]
.
F
i
gu
r
e
1
.
H
i
di
n
g
i
n
f
o
rm
a
t
i
o
n
in
t
h
e
L
S
B
S
i
n
c
e
it
ha
s
t
h
e
s
m
a
l
l
e
s
t
e
ff
e
c
t
on
t
h
e
a
m
o
u
n
t
of
c
o
l
o
r
,
t
h
e
s
m
a
l
l
e
s
t
po
s
s
i
b
l
e
i
m
pa
c
t
on
t
h
e
pi
c
t
u
r
e
w
i
l
l
r
e
pl
a
c
e
t
h
i
s
b
i
t
w
i
t
h
a
b
i
t
of
t
h
e
hi
dde
n
da
t
a
.
U
s
i
n
g
t
hi
s
m
e
t
h
o
d,
t
h
e
i
m
a
ge
s
t
e
ga
n
o
g
r
a
p
h
y
e
m
be
ds
t
h
e
s
e
c
r
e
t
in
e
a
c
h
pi
xe
l
of
t
h
e
c
o
ve
r
i
m
a
ge
in
t
h
e
L
S
B
s
.
It
is
w
e
l
l
k
n
o
w
n
t
ha
t
t
h
e
L
S
B
b
a
s
e
d
s
t
e
ga
n
o
g
r
a
p
h
y
is
o
n
e
of
t
h
e
s
i
m
p
l
e
s
t
t
e
c
hni
que
s
to
h
i
de
p
i
xe
l
v
a
l
ue
s
w
i
t
h
o
ut
pe
r
c
e
pt
i
b
l
e
di
s
t
o
r
t
i
o
n
s
f
r
o
m
a
s
e
c
r
e
t
m
e
s
s
a
ge
in
t
h
e
L
S
Bs
.
T
h
e
c
ha
n
ge
s
in
L
S
B
v
a
l
ue
a
r
e
i
n
v
i
s
i
b
l
e
to
a
h
u
m
a
n
e
y
e
.
In
t
h
e
l
i
t
e
ra
t
u
r
e
,
c
r
y
pt
o
gr
a
p
h
y
is
c
o
n
s
i
de
r
e
d
as
an
e
f
f
e
c
t
i
v
e
w
a
y
to
s
e
c
ur
e
l
y
t
r
a
n
s
f
e
r
i
n
f
o
r
m
a
t
i
o
n.
It
s
c
r
a
m
b
l
e
s
t
h
e
i
m
a
ge
i
n
f
o
r
m
a
t
i
o
n
b
e
f
o
r
e
t
r
a
n
s
m
i
t
t
i
ng
it
to
c
ha
n
ge
its
s
t
r
uc
t
u
r
e
.
T
h
e
r
e
f
o
r
e
,
t
h
e
a
t
t
a
c
ke
r
c
a
nn
o
t
be
h
a
c
ke
d
b
e
c
a
us
e
it
is
h
a
rd
to
ge
t
b
a
c
k
t
h
e
o
r
i
g
i
n
a
l
i
m
a
ge
.
S
o
,
i
t
p
r
o
v
i
de
s
an
i
m
a
ge
’s
m
o
di
f
i
e
d
s
ha
pe
,
b
ut
it
do
e
s
n
o
t
hi
de
t
h
e
i
m
a
ge
e
ve
n
if
it
is
a
go
o
d
s
e
c
ur
i
t
y
m
e
t
h
o
d.
T
h
e
m
a
i
n
o
b
j
e
c
t
i
ve
is
to
pr
ov
i
de
t
h
e
o
r
i
gi
na
l
i
m
a
ge
w
i
t
h
b
e
t
t
e
r
p
r
o
t
e
c
t
i
o
n
[5
,
6]
.
Im
a
ge
e
n
c
r
y
pt
i
o
n
is
a
p
r
o
c
e
s
s
of
i
n
f
o
r
m
a
t
i
o
n
t
ra
n
s
f
o
r
m
a
t
i
o
n
(kn
o
w
n
as
a
pl
a
i
n
i
m
a
ge
)
by
us
i
n
g
an
a
l
go
ri
t
hm
(
r
e
f
e
r
r
e
d
to
as
a
c
i
ph
e
r
)
,
m
a
ki
ng
it
i
n
c
o
m
p
r
e
h
e
n
s
i
b
l
e
to
a
n
y
pe
r
s
o
n
e
xc
e
pt
t
h
o
s
e
w
i
t
h
s
pe
c
i
a
l
kn
o
w
l
e
dge
(kn
o
w
n
as
a
ke
y
).
T
hi
s
p
r
o
c
e
s
s
r
e
s
ul
t
s
in
an
e
n
c
ry
pt
e
d
i
m
a
ge
(c
a
l
l
e
d
a
c
i
p
h
e
r
i
m
a
ge
).
T
h
e
p
r
o
c
e
s
s
of
c
o
n
v
e
r
t
i
ng
t
h
e
c
i
p
h
e
r
-
i
m
a
ge
b
a
c
k
to
i
t
s
o
ri
gi
na
l
s
h
a
pe
so
t
ha
t
it
can
be
pe
r
c
e
i
v
e
d
is
c
a
l
l
e
d
D
e
c
r
y
pt
i
o
n.
F
urt
h
e
rm
o
r
e
,
i
m
a
ge
e
n
c
r
y
pt
i
o
n
is
us
u
a
l
l
y
us
e
d
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2502
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4752
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i
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w
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m
a
j
o
r
t
y
pe
s
:
s
y
m
m
e
t
r
i
c
a
n
d
a
s
y
m
m
e
t
r
i
c
ke
y
c
r
y
pt
o
gr
a
p
h
y
.
F
o
r
pu
r
po
s
e
s
of
bo
t
h
e
n
c
r
y
pt
i
o
n
a
n
d
de
c
r
y
pt
i
o
n
,
s
y
m
m
e
t
ri
c
-
ke
y
c
r
y
pt
o
gr
a
p
h
y
r
e
qui
r
e
s
a
s
i
n
gl
e
p
ri
v
a
t
e
ke
y
.
On
t
h
e
o
t
h
e
r
ha
n
d
,
t
h
e
a
s
y
m
m
e
t
r
i
c
ke
y
us
e
s
t
w
o
ke
y
s
f
i
r
s
t
for
e
n
c
r
y
pt
i
o
n
a
nd
t
h
e
o
t
h
e
r
for
de
c
r
y
pt
i
o
n
pu
rpo
s
e
s
[7
,
8]
.
T
h
e
f
r
a
c
t
a
l
i
m
a
ge
c
a
n
be
e
ff
i
c
i
e
n
t
l
y
us
e
d
as
a
ke
y
in
t
h
e
e
n
c
ry
pt
i
o
n
m
e
t
h
o
ds
b
e
c
a
us
e
of
its
di
f
f
i
c
ul
t
y
to
b
r
e
a
k
a
g
a
i
n
s
t
a
t
t
a
c
ks
.
T
h
e
ge
n
e
r
a
t
i
o
n
of
t
h
e
f
ra
c
t
a
l
i
m
a
ge
can
be
c
h
a
n
ge
d
s
i
g
n
i
f
i
c
a
n
t
l
y
w
h
e
n
a
s
m
a
l
l
c
h
a
nge
o
c
c
urr
e
d
in
a
n
y
of
its
pa
ra
m
e
t
e
r
s
.
T
h
e
r
e
f
o
r
e
,
it
is
s
ui
t
a
b
l
e
to
i
m
pl
e
m
e
n
t
a
s
e
c
u
r
e
e
n
c
r
y
pt
i
o
n
ke
y
.
In
t
h
e
l
i
t
e
r
a
t
u
r
e
,
s
e
v
e
r
a
l
pa
pe
r
s
ha
v
e
be
e
n
p
r
o
po
s
e
d
on
i
m
a
ge
e
n
c
r
y
pt
i
o
n
us
i
ng
a
f
ra
c
t
a
l
ke
y
fo
r
i
m
a
ge
e
n
c
r
y
pt
i
o
n
[9
-
12]
.
On
t
h
e
o
t
h
e
r
ha
n
d
,
s
t
e
ga
n
o
gra
p
h
y
is
a
da
t
a
h
i
d
i
n
g
t
e
c
hni
que
i
n
t
e
rn
e
t
.
F
o
r
e
xa
m
pl
e
,
CA
P
T
CH
A
c
o
d
e
s
a
r
e
ge
n
e
ra
t
e
d
a
n
d
l
a
t
e
r
s
e
n
d
t
h
e
m
in
an
e
n
c
r
y
pt
e
d
ve
r
s
i
o
n
.
T
h
e
s
e
c
o
de
s
a
r
e
e
m
b
e
dde
d
A
S
CII
i
nt
o
a
c
ove
r
i
m
a
ge
w
i
t
h
an
e
n
c
r
y
pt
e
d
fo
r
m
r
e
s
ul
t
i
n
g
s
t
e
go
i
m
a
ge
.
T
hus
,
us
i
n
g
i
m
a
ge
s
t
e
ga
n
o
g
r
a
p
h
y
,
a
t
t
a
c
ke
r
s
c
a
nn
o
t
f
e
t
c
h
t
h
e
a
c
t
ua
l
CA
P
T
CH
A
r
e
s
ul
t
i
n
g
in
a
s
e
c
ur
e
d
t
r
a
n
s
m
i
s
s
i
o
n
of
c
o
n
f
i
de
n
t
i
a
l
d
a
t
a
v
i
a
t
h
e
i
n
t
e
rn
e
t
[
13]
.
A
m
o
di
f
i
c
a
t
i
o
n
of
t
h
e
pi
xe
l
v
a
l
ue
D
i
f
fe
r
e
n
c
i
n
g
(P
V
D
)
a
l
go
r
i
t
hm
is
us
e
d
for
Im
a
ge
S
t
e
ga
n
o
gra
p
h
y
in
t
h
e
s
pa
t
i
a
l
do
m
a
i
n.
It
is
n
o
rm
a
l
i
z
i
n
g
s
e
c
r
e
t
da
t
a
v
a
l
ue
by
e
n
c
o
di
ng
m
e
t
h
o
d
to
m
a
ke
t
h
e
n
e
w
pi
xe
l
e
dge
di
f
fe
r
e
n
c
e
.
Co
n
s
e
que
n
t
l
y
,
it
is
l
e
s
s
a
m
o
n
g
t
hr
e
e
n
e
i
g
h
b
o
r
s
(
h
o
ri
z
o
n
t
a
l
,
v
e
r
t
i
c
a
l
a
nd
di
a
go
na
l
)
a
n
d
e
m
b
e
ddi
n
g
da
t
a
o
nl
y
to
l
e
s
s
i
n
t
e
n
s
i
t
y
pi
xe
l
di
f
f
e
r
e
n
c
e
a
r
e
a
s
or
r
e
g
i
o
n
s
.
T
h
e
s
t
r
e
n
gt
h
of
t
h
i
s
s
c
h
e
m
e
is
t
ha
t
a
n
y
r
a
n
do
m
hi
dde
n
s
e
c
r
e
t
da
t
a
do
n
o
t
m
a
ke
a
n
y
s
h
ut
t
l
e
d
i
f
fe
r
e
n
c
e
s
to
S
t
e
g
-
i
m
a
ge
c
o
m
pa
r
e
d
to
t
h
e
o
r
i
gi
na
l
i
m
a
ge
.
F
urt
h
e
rm
o
r
e
,
t
h
e
b
i
t
p
l
a
n
e
s
l
i
c
i
n
g
is
us
e
d
to
a
na
l
y
z
e
t
h
e
m
a
xi
m
u
m
p
a
y
l
o
a
d
t
ha
t
ha
s
b
e
e
n
e
m
b
e
dde
d
i
nt
o
t
h
e
c
ove
r
i
m
a
ge
s
e
c
ur
i
t
y
[14]
.
S
i
n
c
e
t
h
e
l
a
s
t
f
o
ur
de
c
a
de
s
,
m
a
n
y
e
f
fo
r
t
s
ha
v
e
on
de
v
e
l
o
pi
n
g
b
e
e
n
pa
i
d
to
de
v
e
l
o
p
s
e
v
e
r
a
l
P
ub
l
i
c
K
e
y
Cr
pt
o
g
r
a
p
h
y
(P
K
C)
a
l
go
r
i
t
hm
s
,
w
h
e
r
e
c
o
m
pa
ra
t
i
v
e
t
r
e
n
ds
of
t
h
e
s
e
a
l
go
r
i
t
h
m
s
w
e
r
e
b
a
s
e
d
on
e
a
c
h
a
l
go
ri
t
hm
.
T
h
e
r
o
a
dm
a
p
of
PKC
a
l
go
r
i
t
h
m
s
w
i
t
h
t
h
e
m
o
s
t
c
ho
s
e
n
a
l
go
r
i
t
hm
s
a
m
o
n
g
p
r
e
v
i
o
us
r
e
s
e
a
r
c
h
e
r
s
ha
s
v
e
r
y
r
e
c
e
n
t
l
y
be
e
n
pr
e
s
e
nt
e
d
in
[15]
.
In
t
hi
s
r
e
s
pe
c
t
,
t
h
e
s
t
e
gS
V
M
m
o
de
l
as
an
e
m
b
e
ddi
ng
t
e
c
hn
i
q
ue
in
s
t
e
ga
n
o
gra
p
h
y
t
h
a
t
ha
s
e
xpl
o
i
t
e
d
t
h
e
h
um
a
n
v
i
s
ua
l
s
y
s
t
e
m
t
hr
o
ug
h
S
hi
f
t
e
d
L
S
B
h
a
s
s
h
o
w
n
an
e
xpe
c
t
e
d
pe
r
f
o
r
m
a
n
c
e
.
T
h
e
pe
r
f
o
r
m
a
n
c
e
e
v
a
l
ua
t
i
o
n
of
s
t
e
gS
V
M
b
a
s
e
d
on
i
m
pe
r
c
e
pt
i
b
i
l
i
t
y
a
nd
r
o
b
us
t
n
e
s
s
a
n
d
c
o
m
pa
r
e
d
to
t
h
e
o
t
h
e
r
p
r
e
v
i
o
us
m
o
d
e
l
s
in
t
h
e
i
m
a
ge
s
t
e
ga
n
o
g
r
a
p
h
y
do
m
a
i
n
is
b
e
s
t
de
s
c
r
i
b
e
d
in
[16]
.
It
is
w
o
r
t
h
m
e
n
t
i
o
ni
n
g
t
ha
t
t
h
e
s
t
e
ga
n
o
g
r
a
p
h
y
is
t
h
e
a
rt
or
t
e
c
hn
i
q
ue
of
h
i
di
n
g
m
e
s
s
a
ge
da
t
e
i
n
s
i
de
a
c
a
rri
e
r
f
i
l
e
.
It
c
a
n
be
pe
r
fo
r
m
e
d
in
s
uc
h
a
w
a
y
t
h
e
un
a
ut
h
o
ri
z
e
d
(o
r
u
n
s
o
l
i
c
i
t
e
d)
pe
r
s
o
n
a
l
is
n
o
t
c
a
pa
b
l
e
of
de
t
e
c
t
i
n
g
t
h
e
pr
e
s
e
n
c
e
of
da
t
a
i
n
s
i
de
t
h
e
c
a
rr
i
e
r
f
i
l
e
.
T
h
e
m
e
t
h
o
d
p
rov
i
de
s
i
m
pr
o
v
e
d
s
e
c
ur
i
t
y
a
n
d
i
m
p
r
o
v
e
d
h
i
g
h
e
m
b
e
ddi
n
g
c
a
p
a
c
i
t
y
i
m
a
ge
s
t
e
ga
n
o
gra
p
h
y
t
hr
o
ug
h
t
h
e
us
a
ge
of
In
t
e
ge
r
W
a
v
e
l
e
t
T
ra
n
s
f
o
r
m
(IW
T
)
a
n
d
Cha
o
t
i
c
L
o
gi
s
t
i
c
m
a
p
.
L
S
B
t
e
c
h
ni
que
is
us
e
d
to
r
e
pl
a
c
e
t
h
e
b
i
t
s
in
t
h
e
c
o
e
f
f
i
c
i
e
n
t
of
a
de
t
a
i
l
b
a
nd
[
17]
.
T
h
e
s
e
c
ur
e
a
l
go
r
i
t
hm
to
e
n
c
r
y
pt
i
m
a
ge
s
a
f
t
e
r
c
o
m
pr
e
s
s
i
ng
us
i
n
g
f
r
a
c
t
a
l
i
m
a
ge
c
o
m
pr
e
s
s
i
o
n
(F
IC)
is
a
go
o
d
c
o
m
pr
e
s
s
i
o
n
a
n
d
e
n
c
r
y
pt
i
o
n
p
r
o
pe
r
t
i
e
s
.
T
h
e
de
c
o
di
n
g
p
r
o
c
e
s
s
is
c
o
m
po
s
e
d
of
i
t
e
r
a
t
e
d
c
o
n
t
ra
c
t
t
r
a
n
s
f
o
r
m
s
.
T
h
e
i
ni
t
i
a
l
i
m
a
ge
ra
n
ge
b
l
o
c
k
is
t
r
a
n
s
f
o
r
m
e
d
by
t
h
e
i
t
e
r
a
t
e
d
f
r
a
c
t
a
l
t
r
a
n
s
f
o
r
m
,
w
h
i
c
h
m
a
ke
s
t
h
e
i
n
i
t
i
a
l
i
m
a
ge
c
o
n
t
ra
c
t
e
d
to
t
h
e
o
r
i
gi
na
l
i
m
a
ge
.
T
h
e
us
e
s
of
F
IC
of
fe
r
t
h
e
a
dv
a
n
t
a
ge
of
i
n
c
r
e
a
s
e
d
s
e
c
ur
i
t
y
b
e
c
a
us
e
of
t
h
e
us
e
of
t
h
e
f
r
a
c
t
a
l
c
o
de
s
i
n
s
t
e
a
d
of
t
h
e
o
r
i
gi
n
a
l
i
m
a
ge
.
F
i
na
l
l
y
,
w
h
e
n
s
o
m
e
of
t
h
e
f
r
a
c
t
a
l
c
oe
ff
i
c
i
e
n
t
s
c
h
a
nge
d
us
i
n
g
t
h
e
e
n
c
r
y
pt
i
o
n
p
r
o
c
e
s
s
,
t
h
e
i
m
a
g
e
c
a
nn
o
t
be
t
r
a
n
s
f
o
r
m
e
d
c
o
rr
e
c
t
l
y
to
t
h
e
o
r
i
gi
na
l
i
m
a
ge
[18
-
2
5]
.
2.
P
R
O
P
O
S
ED
M
ETH
O
D
Im
a
ge
e
n
c
r
y
pt
i
o
n
t
e
c
hn
i
q
ue
s
a
t
t
e
m
p
t
to
c
o
n
v
e
r
t
t
h
e
o
r
i
gi
na
l
i
m
a
ge
to
a
n
o
t
h
e
r
i
m
a
ge
t
ha
t
is
h
a
rd
to
unde
r
s
t
a
n
d
.
A
c
c
o
r
di
n
gl
y
,
it
ke
e
ps
t
h
e
i
m
a
ge
to
be
c
o
n
f
i
de
nt
i
a
l
a
m
o
n
g
us
e
r
s
to
e
n
s
u
r
e
i
n
f
o
r
m
a
t
i
o
n
s
e
c
ur
i
t
y
w
h
e
n
m
uc
h
s
e
n
s
i
t
i
v
e
i
n
f
o
r
m
a
t
i
o
n
is
s
t
o
r
e
d
on
c
o
m
put
e
r
s
a
nd
s
e
n
t
o
ve
r
t
h
e
i
n
t
e
rn
e
t
.
T
h
e
r
e
f
o
r
e
,
o
ur
m
e
t
h
o
d
is
pr
o
po
s
e
d
us
e
d
to
h
i
de
a
b
i
t
m
a
p
c
o
l
o
r
i
m
a
ge
(o
ri
gi
na
l
)
in
a
n
o
t
h
e
r
b
i
t
m
a
p
c
o
l
o
r
i
m
a
ge
(c
o
v
e
r
i
m
a
ge
)
to
m
a
ke
t
h
e
hi
dde
n
i
m
a
ge
(s
e
c
r
e
t
i
m
a
ge
)
m
o
r
e
s
e
c
ur
e
.
As
s
h
o
w
n
in
F
i
gu
r
e
2,
in
t
h
e
f
i
r
s
t
s
t
a
ge
,
t
h
e
ge
n
e
ra
t
e
d
ke
y
i
m
a
ge
is
us
e
d
to
e
n
c
r
y
pt
t
h
e
o
r
i
gi
na
l
i
m
a
ge
c
r
e
a
t
i
ng
t
h
e
s
e
c
r
e
t
i
m
a
ge
.
T
h
e
s
e
c
o
n
d
s
t
a
ge
of
s
e
c
ur
i
t
y
w
o
r
ks
is
to
h
i
de
t
h
e
s
e
c
r
e
t
i
m
a
ge
a
f
t
e
r
e
n
c
r
y
pt
i
n
g
it
i
n
t
o
t
w
o
c
ov
e
r
i
m
a
ge
s
.
T
h
e
f
i
r
s
t
i
m
a
ge
is
us
e
d
as
c
o
v
e
r
i
m
a
ge
s
to
t
h
e
s
e
c
r
e
t
i
m
a
ge
,
w
h
i
l
e
t
h
e
s
e
c
o
n
d
o
n
e
is
us
e
d
as
t
h
e
c
o
ve
r
i
m
a
ge
to
hi
de
t
h
e
f
i
r
s
t
c
o
v
e
r
;
in
c
o
n
s
e
que
n
c
e
,
pr
o
v
i
di
n
g
t
w
o
-
l
e
v
e
l
h
i
di
n
g
s
y
s
t
e
m
s
.
T
h
e
e
n
c
r
y
pt
i
o
n
is
t
h
e
n
a
c
hi
e
v
e
d
by
f
i
r
s
t
ge
n
e
ra
t
i
n
g
of
t
h
e
e
n
c
r
y
pt
i
o
n
ke
y
i
m
a
ge
us
i
n
g
di
f
f
e
r
e
n
t
c
o
m
put
a
t
i
o
n
m
e
t
h
o
ds
a
nd
t
h
e
XOR
o
p
e
r
a
t
i
o
n.
T
h
e
n
,
e
n
c
r
y
pt
e
d
i
m
a
ge
pi
xe
l
s
a
r
e
h
i
dde
n
in
a
n
o
t
h
e
r
i
m
a
ge
(i
.
e
.
,
c
o
ve
r
1)
in
t
h
e
L
S
B
to
c
r
e
a
t
e
t
h
e
l
e
v
e
l
-
1
i
m
a
ge
.
T
hi
s
i
m
a
ge
is
t
h
e
n
hi
dde
n
in
a
n
o
t
h
e
r
i
m
a
ge
(i
.
e
.
,
c
ov
e
r
2)
to
ge
n
e
ra
t
e
t
h
e
l
e
v
e
l
-
2
i
m
a
ge
to
a
dd
an
e
x
t
r
a
l
a
y
e
r
of
s
e
c
ur
i
t
y
(s
e
e
F
i
gur
e
3).
S
i
n
c
e
e
a
c
h
pi
xe
l
n
e
e
ds
8
by
t
e
s
to
be
h
i
dde
n
in
t
h
e
c
o
ve
r
i
m
a
ge
,
t
h
e
s
e
c
r
e
t
i
m
a
ge
s
h
o
ul
d
be
l
e
s
s
t
ha
n
t
h
e
c
o
ve
r
i
m
a
ge
(
Co
ve
r
1)
at
l
e
a
s
t
by
1/
8.
A
ddi
t
i
o
n
a
l
l
y
,
Co
ve
r
1
m
us
t
be
l
e
s
s
t
ha
n
t
h
e
Co
v
e
r
2
by
1/
8;
in
c
o
n
s
e
que
n
c
e
,
t
h
e
s
e
c
ov
e
r
s
a
r
e
s
t
r
e
t
c
h
e
d
Evaluation Warning : The document was created with Spire.PDF for Python.
IS
S
N
:
2502
-
4752
In
do
n
e
s
i
a
n
J
E
l
e
c
E
ng
&
Co
m
p
S
c
i
,
V
o
l
.
18
,
N
o
.
2
,
M
a
y
20
2
0
:
961
-
96
9
964
to
be
of
t
h
e
p
r
o
pe
r
s
i
z
e
.
As
i
l
l
us
t
ra
t
e
d
in
F
i
gu
r
e
2,
t
h
e
m
a
i
n
e
n
c
r
y
pt
i
o
n
a
n
d
h
i
d
i
n
g
a
l
go
r
i
t
h
m
a
r
e
s
u
m
m
a
ri
z
e
d
in
t
h
e
f
o
l
l
ow
i
n
g
s
t
e
ps
:
s
t
e
p
-
1:
L
o
a
d
t
h
e
c
o
l
o
r
b
i
t
m
a
p
i
m
a
ge
(O
ri
g
i
n
a
l
i
m
a
ge
).
s
t
e
p
-
2:
G
e
n
e
ra
t
e
a
ke
y
i
m
a
ge
.
s
t
e
p
-
3:
E
n
c
r
y
pt
t
h
e
o
r
i
g
i
n
a
l
i
m
a
ge
w
i
t
h
t
h
e
ge
n
e
r
a
t
e
d
ke
y
to
ge
t
t
h
e
S
e
c
r
e
t
o
n
e
.
s
t
e
p
-
4:
L
o
a
d
t
h
e
c
o
ve
r
i
m
a
ge
(Co
v
e
r
1).
s
t
e
p
-
5:
H
i
de
t
h
e
e
n
c
r
y
pt
e
d
S
e
c
r
e
t
i
m
a
ge
in
Co
v
e
r
1
a
n
d
ge
n
e
r
a
t
i
ng
a
l
e
v
e
l
-
1
s
t
e
go
i
m
a
ge
.
s
t
e
p
-
6:
L
o
a
d
t
h
e
s
e
c
o
n
d
c
ov
e
r
i
m
a
ge
(Co
v
e
r
2).
s
t
e
p
-
7:
H
i
de
t
h
e
l
e
v
e
l
-
1
s
t
e
go
i
m
a
ge
in
Co
v
e
r
2
a
nd
ge
n
e
r
a
t
i
n
g
a
l
e
v
e
l
-
2
s
t
e
go
i
m
a
ge
.
s
t
e
p
-
8:
O
ut
put
S
t
e
go
i
m
a
ge
.
s
t
e
p
-
9:
E
n
d.
F
i
gu
r
e
2
.
E
n
c
r
y
pt
i
o
n
a
n
d
hi
di
ng
s
t
e
ps
di
a
g
r
a
m
T
h
e
ke
y
ge
n
e
r
a
t
i
o
n
A
l
go
ri
t
hm
m
e
n
t
i
o
n
e
d
in
s
t
e
p
-
2
in
t
h
e
a
b
ov
e
a
l
go
r
i
t
h
m
is
a
pp
l
i
e
d
us
i
n
g
t
h
e
fo
l
l
ow
i
n
g
s
t
e
ps
(F
i
g
u
r
e
3)
:
s
t
e
p
-
1:
L
o
a
d
t
h
e
c
o
l
o
r
b
i
t
m
a
p
i
m
a
ge
(O
ri
g
i
n
a
l
i
m
a
ge
).
s
t
e
p
-
2:
A
ppl
y
t
h
e
f
un
c
t
i
o
n
(R
e
s
h
a
pe
)
on
t
h
e
S
e
c
r
e
t
i
m
a
ge
;
t
h
i
s
f
un
c
t
i
o
n
c
h
a
nge
s
t
h
e
s
i
z
e
a
n
d
t
h
e
po
s
i
t
i
o
n
of
t
h
e
i
m
a
ge
pi
xe
l
s
to
o
b
t
a
i
n
t
h
e
F
i
na
l
S
e
c
r
e
t
i
m
a
ge
.
s
t
e
p
-
3:
F
i
nd
t
h
e
m
e
a
n
f
a
c
t
o
r
by
us
i
n
g
M
e
a
n
f
un
c
t
i
o
n
.
s
t
e
p
-
4:
In
p
ut
t
w
o
E
xt
e
rn
a
l
K
e
y
s
to
be
us
e
d
in
ke
y
i
m
a
ge
ge
n
e
r
a
t
i
o
n.
s
t
e
p
-
5:
A
ppl
y
c
a
l
c
ul
a
t
i
o
n
s
us
i
n
g
t
h
e
a
b
o
ve
-
s
e
l
e
c
t
e
d
ke
y
s
a
n
d
m
e
a
n
f
a
c
t
o
r
on
t
h
e
O
ri
gi
na
l
i
m
a
ge
to
c
r
e
a
t
e
a
ke
y
i
m
a
ge
by
t
a
ki
n
g
t
h
e
m
o
d
of
e
a
c
h
p
i
xe
l
.
s
t
e
p
-
6:
Ro
t
a
t
e
d
t
h
e
ke
y
i
m
a
ge
(18
0)
de
g
r
e
e
us
i
ng
r
o
t
a
t
i
o
n
f
u
n
c
t
i
o
n
(i
m
r
o
t
a
t
e
).
s
t
e
p
-
7:
Co
m
b
i
n
e
t
h
e
i
m
a
ge
s
f
r
o
m
s
t
e
p
-
1
a
nd
s
t
e
p
-
5
us
i
n
g
b
i
t
w
i
s
e
XOR
f
un
c
t
i
o
n
to
ob
t
a
i
n
t
h
e
S
e
c
r
e
t
i
m
a
ge
.
s
t
e
p
-
8:
O
ut
put
S
e
c
r
e
t
i
m
a
ge
.
s
t
e
p
-
9:
E
n
d.
Evaluation Warning : The document was created with Spire.PDF for Python.
In
do
n
e
s
i
a
n
J
E
l
e
c
E
ng
&
Co
m
p
S
c
i
IS
S
N
:
2502
-
4752
T
w
o
-
l
e
v
e
l
h
i
di
ng
an
e
n
c
r
y
pt
e
d
i
m
ag
e
(
F
at
e
n
H
.
M
oham
m
e
d
S
e
di
q
A
l
-
Ka
de
i
)
965
F
i
gu
r
e
3.
K
e
y
i
m
a
ge
ge
n
e
r
a
t
i
o
n
di
a
g
ra
m
To
ge
t
b
a
c
k
t
h
e
o
r
i
g
i
n
a
l
i
m
a
ge
,
t
h
e
D
e
c
r
y
pt
i
o
n
a
n
d
Un
-
hi
di
n
g
s
t
e
ps
a
r
e
a
ppl
i
e
d
in
r
e
v
e
r
s
e
s
e
que
n
c
e
as
s
h
o
w
n
in
t
h
e
f
o
l
l
ow
i
n
g
a
l
go
r
i
t
hm
(s
e
e
F
i
gu
r
e
4)
:
s
t
e
p
-
1:
In
p
ut
l
e
v
e
l
-
1
S
t
e
go
i
m
a
ge
(Co
v
e
r
1).
s
t
e
p
-
2:
G
e
t
l
e
v
e
l
-
1
s
t
e
go
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IS
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Evaluation Warning : The document was created with Spire.PDF for Python.
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IS
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n
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o
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m
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t
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e
c
a
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h
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s
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d
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u
t
h
e
n
t
i
c
i
t
y
.
R
EF
ER
EN
C
ES
[
1]
S
.
B
ha
l
l
a
m
udi
,
“
I
m
a
g
e
S
t
e
g
a
no
g
r
a
phy
,
”
i
n
E
E
7150
–
D
i
gi
t
a
l
I
m
age
P
r
oc
e
s
s
i
ng
,
2015
,
pp
.
1
-
17.
[
2]
Z
.
A
l
qa
di
,
B
.
Z
a
h
r
a
n,
Q
.
J
a
be
r
,
B
.
A
y
y
oub,
J
.
A
l
-
A
z
z
e
h,
a
nd
A
.
S
ha
r
a
dqh
,
“
P
r
o
po
s
e
d
I
m
pl
e
m
e
nt
a
t
i
o
n
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e
t
ho
d
t
o
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m
pr
o
v
e
L
S
B
E
f
f
i
c
i
e
nc
y
,
”
I
nt
.
J
.
C
om
put
.
Sc
i
.
M
ob
.
C
om
pu
t
.
,
v
o
l
.
8,
no
.
3,
pp
.
306
-
31
9,
20
19.
[
3]
M
.
G
.
A
nc
ha
l
C
ha
nd
e
r
L
e
kha
,
“
H
i
d
i
ng
a
n
I
m
a
g
e
D
a
t
a
i
nt
o
V
i
de
o
S
t
e
no
g
r
a
phy
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s
i
ng
D
i
f
f
e
r
e
nt
A
l
g
o
r
i
t
hm
a
nd
M
A
T
L
A
B
:
A
R
e
v
i
e
w
,
”
I
n
t
.
J
.
C
om
pu
t
.
Sc
i
.
T
r
e
nd
s
T
e
c
h
nol
.
,
v
o
l
.
6,
no
.
2,
pp
.
12
-
16
,
2018
.
[
4]
A
.
B
.
M
.
S
.
B
o
ur
i
da
h
,
T
.
B
o
ude
n
,
“
F
r
ac
t
i
on
al
C
ha
os
Sy
n
c
hr
on
i
z
at
i
on
f
or
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o
l
or
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m
a
ge
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nc
r
y
p
t
i
on
,
”
i
n
T
h
i
r
d
I
nt
e
r
na
t
i
o
na
l
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o
nf
e
r
e
nc
e
o
n
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e
c
hno
l
o
g
i
c
a
l
A
dv
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nc
e
s
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n
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l
e
c
t
r
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c
a
l
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ng
i
ne
e
r
i
ng
(
I
C
T
A
E
E
’
18.
)
,
2
018
,
pp.
1
-
8
.
[
5]
K
.
D
.
P
a
t
e
l
a
n
d
S
.
B
e
l
a
n
i
,
“
I
m
a
g
e
e
nc
r
y
pt
i
o
n
us
i
ng
di
f
f
e
r
e
n
t
t
e
c
h
ni
qu
e
s
:
A
r
e
v
i
e
w
,
”
I
n
t
.
J
.
E
m
e
r
g.
T
e
c
hno
l
.
A
d
v
.
E
ng.
,
v
o
l
.
1
,
no
.
1
,
pp
.
30
-
34
,
2
011
.
[
6]
R
.
K
a
ur
a
nd
E
.
K
.
S
i
ng
h,
“
I
m
a
g
e
e
nc
r
y
pt
i
o
n
t
e
c
hni
qu
e
s
:
a
s
e
l
e
c
t
e
d
r
e
v
i
e
w
,
”
J
.
C
om
pu
t
.
E
n
g.
,
v
o
l
.
9,
no
.
6,
pp.
80
-
83
,
201
3.
[
7]
A
.
N
a
g
e
t
al
.
, “
I
m
age
e
nc
r
y
pt
i
o
n
us
i
ng
af
f
i
ne
t
r
an
s
f
or
m
a
nd
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O
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ope
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at
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on
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n
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011
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nt
e
r
na
t
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o
na
l
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o
nf
e
r
e
nc
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o
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g
na
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o
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e
s
s
i
ng
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o
m
m
uni
c
a
t
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o
n
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o
m
put
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ng
a
nd
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e
t
w
o
r
k
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ng
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e
c
hno
l
og
i
e
s
,
20
11,
p
p.
30
9
-
312.
[
8]
R
.
M
.
R
a
d
,
A
.
A
t
t
a
r
,
a
n
d
R
.
E
.
A
t
a
n
i
,
“
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ne
w
f
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s
t
a
nd
s
i
m
pl
e
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m
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g
e
e
nc
r
y
pt
i
o
n
a
l
g
o
r
i
t
hm
us
i
ng
s
c
a
n
pa
t
t
e
r
ns
a
nd
X
O
R
,
”
I
n
t
.
J
.
Si
gna
l
P
r
o
c
e
s
s
.
I
m
age
P
r
oc
e
s
s
.
P
at
t
e
r
n
R
e
c
ogn
i
t
.
,
v
o
l
.
6
,
no
.
5
,
pp
.
275
-
290
,
201
3.
[
9]
S
.
K
.
M
i
t
r
a
,
C
.
A
.
M
u
r
t
hy
,
a
nd
M
.
K
.
K
undu
,
“
A
s
t
udy
o
n
pa
r
t
i
t
i
o
ne
d
i
t
e
r
a
t
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v
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m
s
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o
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m
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g
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om
pr
e
s
s
i
o
n,
”
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undam
.
I
n
f
or
m
at
i
c
ae
,
v
o
l
.
34,
no
.
4
,
pp.
4
13
-
428
,
1
998.
[
10]
S
.
K
.
A
bd
-
El
-
H
a
f
i
z
,
A
.
G
.
R
a
dw
a
n
,
S
.
H
.
A
.
H
a
l
e
e
m
,
a
nd
M
.
L
.
B
a
r
a
ka
t
,
“
A
f
r
a
c
t
a
l
-
ba
s
e
d
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m
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g
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e
nc
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y
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o
n
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y
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t
e
m
,
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E
T
I
m
age
P
r
oc
e
s
s
.
,
v
o
l
.
8,
no
.
12
,
pp.
7
42
-
752
,
2014
.
[
11]
K
.
S
.
N
.
R
a
j
u
,
M
.
V
.
A
.
K
um
a
r
,
a
nd
M
.
V
.
V
.
M
.
L
a
t
h
a
,
“
I
m
a
g
e
E
nc
r
y
pt
i
o
n
a
nd
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e
c
r
y
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i
o
n
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s
i
ng
S
c
a
n
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a
t
t
e
r
n
,
”
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nt
.
J
.
E
l
e
c
t
r
on
.
E
l
e
c
t
r
.
C
om
p
ut
.
Sy
s
t
.
I
J
E
E
C
S
,
v
o
l
.
5,
no
.
5,
2
016
.
[
12]
G
.
B
.
H
unt
r
e
s
s
,
“
E
nc
r
y
pt
i
o
n
us
i
ng
f
r
a
c
t
a
l
k
e
y
.
”
G
oog
l
e
P
at
e
nt
s
,
24
-
A
u
g
-
2004.
[
13]
S
.
P
r
a
m
a
ni
k
,
R
.
P
.
S
i
ng
h,
a
nd
R
.
G
ho
s
h,
“
A
ne
w
e
nc
r
y
pt
e
d
m
e
t
h
o
d
i
n
i
m
a
g
e
s
t
e
g
a
no
g
r
a
phy
,
”
I
n
done
s
.
J
.
E
l
e
c
t
r
.
E
ng.
C
om
p
ut
.
Sc
i
.
,
v
o
l
.
14
,
no
.
3,
p
p
.
141
2
-
1419
,
2019
.
[
14]
S
.
S
.
N
.
B
h
ui
y
a
n,
N
.
A
.
M
a
l
e
k
,
O
.
O
.
K
h
a
l
i
f
a
,
a
nd
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.
D
.
A
.
R
a
hm
a
n
,
“
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n
I
m
pr
o
v
e
d
I
m
a
g
e
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t
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no
g
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ph
y
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l
go
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t
hm
ba
s
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o
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V
D
,
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nd
one
s
.
J
.
E
l
e
c
t
r
.
E
ng.
C
om
p
ut
.
Sc
i
.
,
v
o
l
.
1
0,
no
.
2,
p
p.
56
9
-
577
,
2
018
.
[
15]
J
.
I
.
A
hm
a
d,
R
.
D
i
n,
a
nd
M
.
A
hm
a
d,
“
A
na
l
y
s
i
s
r
e
v
i
e
w
o
n
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ubl
i
c
k
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r
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r
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phy
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l
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s
,
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ndo
ne
s
.
J
.
E
l
e
c
t
r
.
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ng.
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om
p
ut
.
Sc
i
.
,
v
o
l
.
12
,
no
.
2,
pp
.
447
-
45
4,
20
18.
[
16]
H
.
S
.
H
us
s
a
i
n,
R
.
D
i
n
,
M
.
H
.
A
l
i
,
a
nd
N
.
B
a
l
q
i
s
,
“
T
he
E
m
b
e
dd
i
n
g
P
e
r
f
o
r
m
a
nc
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o
f
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t
e
g
o
S
V
M
M
o
de
l
i
n
I
m
a
g
e
S
t
e
g
a
no
g
r
a
phy
,
”
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n
done
s
.
J
.
E
l
e
c
t
r
.
E
ng
.
C
om
pu
t
.
Sc
i
.
,
v
o
l
.
12,
no
.
1,
pp
.
233
-
238
,
201
8.
[
17]
N
.
K
r
i
s
hna
v
e
n
i
a
nd
S
.
P
e
r
i
y
a
s
a
m
y
,
“
A
nov
e
l
a
nd
i
nno
v
a
t
i
v
e
a
p
pr
o
a
c
h
f
o
r
i
m
a
g
e
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t
e
g
a
no
g
r
a
phy
w
i
t
h
c
ha
o
s
,
”
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ndo
ne
s
.
J
.
E
l
e
c
t
r
.
E
ng
.
C
om
pu
t
.
S
c
i
.
,
v
o
l
.
11
,
no
.
1
,
pp
.
263
-
267
,
2
018.
[
18]
A
.
M
.
F
.
a
nd
A
.
A
.
-
D
.
H
e
y
a
m
M
a
r
a
ha
,
K
a
m
e
r
a
n
A
l
i
A
m
e
e
n,
D
a
l
y
a
R
a
a
d
A
bba
s
,
R
a
g
ha
d
Z
ua
hi
r
Y
o
us
i
f
,
“
E
v
a
l
ua
t
i
ng
t
he
R
o
bus
t
ne
s
s
o
f
I
m
a
g
e
W
a
t
e
r
m
a
r
ki
ng
S
y
s
t
e
m
ba
s
e
d
o
n
M
ul
t
i
l
e
v
e
l
W
a
v
e
l
e
t
T
r
a
ns
f
o
r
m
,
”
J
.
E
ng
.
A
ppl
.
Sc
i
.
,
v
o
l
.
14
,
no
.
23
,
p
p.
87
12
-
8720
,
201
9.
[
19]
H
.
G
a
o
,
Y
.
Z
ha
ng
,
S
.
L
i
a
ng
,
a
nd
D
.
L
i
,
“
A
ne
w
c
ha
o
t
i
c
a
l
go
r
i
t
hm
f
o
r
i
m
a
g
e
e
nc
r
y
pt
i
o
n,
”
C
ha
os
,
Sol
i
t
on
s
&
F
r
ac
t
a
l
s
,
v
o
l
.
29
,
no
.
2
,
pp
.
393
-
399
,
200
6.
[
20]
N
.
A
.
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