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wavelet
XDict
n
. 小浪,微波
PyDict
小浪,微波
Taiwan
MOE
computer
dictionary
(
moecomp
)
wavelet
子波; 小波
WordNet
(
r
)
3
.
0
(
2006
) (
WordNet
)
wavelet
n
1
:
a
small
wave
on
the
surface
of
a
liquid
[
synonym
: {
ripple
},
{
rippling
}, {
riffle
}, {
wavelet
}]
The
Collaborative
International
Dictionary
of
English
v
.
0
.
48
(
gcide
)
Wavelet
\
Wave
"
let
\,
n
.
A
little
wave
;
a
ripple
.
[
1913
Webster
]
The
Free
On
-
line
Dictionary
of
Computing
(
foldoc
)
A
waveform
that
is
bounded
in
both
{
frequency
}
and
duration
.
Wavelet
tranforms
provide
an
alternative
to
more
traditional
{
Fourier
transforms
}
used
for
analysing
waveforms
,
e
.
g
.
sound
.
The
{
Fourier
transform
}
converts
a
signal
into
a
continuous
series
of
{
sine
waves
},
each
of
which
is
of
constant
frequency
and
{
amplitude
}
and
of
infinite
duration
.
In
contrast
,
most
real
-
world
signals
(
such
as
music
or
images
)
have
a
finite
duration
and
abrupt
changes
in
frequency
.
Wavelet
transforms
convert
a
signal
into
a
series
of
wavelets
.
In
theory
,
signals
processed
by
the
wavelet
transform
can
be
stored
more
efficiently
than
ones
processed
by
Fourier
transform
.
Wavelets
can
also
be
constructed
with
rough
edges
,
to
better
approximate
real
-
world
signals
.
For
example
,
the
United
States
Federal
Bureau
of
Investigation
found
that
Fourier
transforms
proved
inefficient
for
approximating
the
whorls
of
fingerprints
but
a
wavelet
transform
resulted
in
crisper
reconstructed
images
.
{
SBG
Austria
(
http
://
mat
.
sbg
.
ac
.
at
/~
uhl
/
wav
.
html
)}.
["
Ten
Lectures
on
Wavelets
",
Ingrid
Daubechies
].
(
1994
-
11
-
09
)
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