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.

转载

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