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wfilters

wavelet filter set

Calling Sequence

[Lo_D,Hi_D,Lo_R,Hi_R]=wfilters(wname)
[Lo_D,Hi_D]=wfilters(wname,'d')
[Lo_R,Hi_R]=wfilters(wname,'r')
[Lo_D,Lo_R]=wfilters(wname,'l')
[Hi_D,Hi_R]=wfilters(wname,'h')

Parameters

wname
: wavelet name, haar( "haar"), daubechies ("db1" to "db20"), coiflets ("coif1" to "coif5"), symlets ("sym2" to "sym20"), legendre ("leg1" to "leg9"), bathlets("bath4.0" to "bath4.15" and "bath6.0" to "bath6.15"), dmey ("dmey"), beyklin ("beylkin"), vaidyanathan ("vaidyanathan"), biorthogonal B-spline wavelets ("bior1.1" to "bior6.8"), "rbior1.1" to "rbior6.8"
Lo_D
: lowpass analysis filter
Hi_D
: highpass analysis filter
Lo_R
: lowpass synthesis filter
Hi_R
: highpass synthesis filter

Description

wfilters is an utility function for obtaining analysis and synthesis filter set.

Examples

[lo_d,hi_d,lo_r,hi_r]=wfilters('db2');

Authors

Roger Liu and Isaac Zhi

See Also


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