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Related Symbols
LowpassFilter
BandpassFilter
HighpassFilter
LeastSquaresFilterKernel
Related Categories
Image Processing
Signal Processing
Remove Noise from a Signal with a Lowpass Filter
Example Notebook
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Start with a noisy signal:
I
n
[
1
]
:
=
d
a
t
a
=
T
a
b
l
e
[
S
i
n
[
i
^
2
+
i
]
+
R
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d
o
m
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[
{
-
.
2
,
.
3
}
]
,
{
i
,
0
,
P
i
,
0
.
0
0
3
}
]
;
Use
L
o
w
p
a
s
s
F
i
l
t
e
r
to diminish high-frequency content and remove the noise:
I
n
[
2
]
:
=
M
a
n
i
p
u
l
a
t
e
[
G
r
a
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C
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[
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i
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P
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/
@
{
d
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a
,
L
o
w
p
a
s
s
F
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[
d
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a
,
ω
,
3
1
]
}
]
,
{
{
ω
,
.
5
}
,
.
1
,
P
i
}
]
O
u
t
[
2
]
=
Apply the same
L
o
w
p
a
s
s
F
i
l
t
e
r
to remove the noise in an image:
I
n
[
3
]
:
=
L
o
w
p
a
s
s
F
i
l
t
e
r
,
.
5
,
3
1
/
/
I
m
a
g
e
A
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s
t
O
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t
[
3
]
=
Related Symbols
LowpassFilter
BandpassFilter
HighpassFilter
LeastSquaresFilterKernel
Publisher Information
Contributed by:
Wolfram Staff
