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idwt

Inverse Discrete Fast Wavelet Transform

Calling Sequence

X=idwt(cA,cD,wname,[L])
X=idwt(cA,cD,Lo_R,Hi_R,[L])

Parameters

wname:

wavelet name, haar( "haar"), daubechies ("db1" to "db36"), coiflets ("coif1" to "coif17"), 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"

x :

reconstructed vector

Lo_R:

lowpass synthesis filter

Hi_R:

highpass syntheis filter

L :

restruction length

cA:

approximation coefficent

cD:

detail coefficent

Description

idwt is for inverse discrete fast wavelet transform. Coefficent could be void vector as '[]' for cA or cD.

Examples

x=rand(1,100);
[cA,cD]=dwt(x,'db2','mode','asymh');
x0=idwt(cA,cD,'db2',100);

Authors

See also


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