liftwave

(To be removed) Lifting schemes

liftwave will be removed in a future release. Use liftingScheme. For more information, see Version History.

Syntax

LS = liftwave(wname)

LS = liftwave(wname,'Int2Int')

Description

LS = liftwave(wname) returns the lifting scheme associated with the wavelet specified by wname.

LS = liftwave(wname,'Int2Int') allows to perform an integer to integer wavelet transform.

Examples

Create Lifting Scheme With liftwave

Create the lifting scheme associated with the db2 wavelet.

lsdb2 = liftwave("db2");

Visualize the lifting scheme.

displs(lsdb2);

lsdb2 = {...                                      
'd'             [ -1.73205081]              [0]   
'p'             [ -0.06698730  0.43301270]  [1]   
'd'             [  1.00000000]              [-1]  
[  1.93185165]  [  0.51763809]              []    
};                                                

Input Arguments

wname — Wavelet

character vector | string scalar

Wavelet, specified as a character vector or string scalar. Valid values for wname are listed here.

WNAME Values
'lazy'
'haar'
'db1', 'db2', 'db3', 'db4', 'db5', 'db6', 'db7', 'db8'
'sym2', 'sym3', 'sym4', 'sym5', 'sym6', 'sym7', 'sym8'
Cohen-Daubechies-Feauveau wavelets 'cdf1.1', 'cdf1.3', 'cdf1.5' 'cdf3.1', 'cdf3.3', 'cdf3.5' 'cdf5.1', 'cdf5.3', 'cdf5.5' 'cdf2.2', 'cdf2.4', 'cdf2.6' 'cdf4.2', 'cdf4.4', 'cdf4.6' 'cdf6.2', 'cdf6.4', 'cdf6.6'
'biorX.Y' (see waveinfo)
'rbioX.Y' (see waveinfo)
'bs3': identical to 'cdf4.2'
'rbs3': reverse of 'bs3'
'9.7': identical to 'bior4.4'
'r9.7': reverse of '9.7'

Note:

• 'cdfX.Y' == 'rbioX.Y' except for rbio4.4 and rbio5.5.

• 'biorX.Y' is the reverse of 'rbioX.Y'

• 'haar' == 'db1' == 'bior1.1' == 'cdf1.1'

• 'db2' == 'sym2' and 'db3' == 'sym3'

Data Types: char | string

Output Arguments

LS — Lifting scheme

cell array

Lifting scheme, returned as a cell array. For more information, see lsinfo.

Version History

Introduced before R2006a

R2021a: liftwave will be removed

liftwave will be removed in a future release. Use liftingScheme.

Functionality	Result	Use Instead	Compatibility Considerations
LS = liftwave(WNAME)	Still runs	LS = liftingScheme('Wavelet',WNAME)	You can also use liftingScheme to create a lifting scheme by specifying lowpass filter coefficients or customized lifting steps.
LS = liftwave(WNAME,'Int2Int')	Still runs	LS = liftingScheme('Wavelet',WNAME) [CA,CD] = lwt(X,'LiftingScheme',LS,'Int2Int',true)	To preserve integer-valued data, set the Int2Int name-value pair of the functions lwt or lwt2 to true.