小波变换的wfilters的wname
waveinfo
Wavelets information
获取小波基信息
Syntax
waveinfo
waveinfo(wname)
waveinfo(‘wsys’)
描述
waveinfo 可获取工具包里所有的小波基信息.
waveinfo(wname) 可获取从属于小波基族wname的信息
waveinfo('wsys') 可获取小波基‘wsys’的信息
例子
waveinfo('db')
Information on Daubechies wavelets.
Daubechies Wavelets
General characteristics: Compactly supported
wavelets with extremal phase and highest
number of vanishing moments for a given
support width. Associated scaling filters are
minimum-phase filters.
Family Daubechies
Short name db
Order N N a positive integer from 1 to 45.
Examples db1 or haar, db4, db15
Orthogonal yes
Biorthogonal yes
Compact support yes
DWT possible
CWT possible
Support width 2N-1
Filters length 2N
Regularity about 0.2 N for large N
Symmetry far from
Number of vanishing
moments for psi N
Reference: I. Daubechies,
Ten lectures on wavelets,
CBMS, SIAM, 61, 1994, 194-202.
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