deletelift

Delete elementary lifting steps

Since R2021a

Syntax

lsn = deletelift(lscheme)

lsn = deletelift(lscheme,loc)

Description

lsn = deletelift(lscheme) deletes the last elementary lifting step from the lifting scheme lsc.

lsn = deletelift(lscheme,loc) deletes the elementary lifting steps at the positions specified by loc.

Examples

Delete Elementary Lifting Steps

Create a lifting scheme associated with the db3 wavelet.

lsc = liftingScheme('Wavelet','db3')

lsc = 
 	 Wavelet               : 'db3' 
	 LiftingSteps          : [4 × 1] liftingStep 
	 NormalizationFactors  : [2.3155 0.4319] 
	 CustomLowpassFilter   : [  ] 


 Details of LiftingSteps :
            Type: 'predict'
    Coefficients: -2.4255
        MaxOrder: 0

            Type: 'update'
    Coefficients: [-0.0793 0.3524]
        MaxOrder: 1

            Type: 'predict'
    Coefficients: [2.8953 -0.5614]
        MaxOrder: -1

            Type: 'update'
    Coefficients: 0.0198
        MaxOrder: 2

The lifting scheme has four elementary lifting steps. Delete the second step.

lsc2 = deletelift(lsc,2)

lsc2 = 
 	 Wavelet               : 'custom' 
	 LiftingSteps          : [3 × 1] liftingStep 
	 NormalizationFactors  : [2.3155 0.4319] 
	 CustomLowpassFilter   : [  ] 


 Details of LiftingSteps :
            Type: 'predict'
    Coefficients: -2.4255
        MaxOrder: 0

            Type: 'predict'
    Coefficients: [2.8953 -0.5614]
        MaxOrder: -1

            Type: 'update'
    Coefficients: 0.0198
        MaxOrder: 2

Input Arguments

lscheme — Lifting scheme

liftingScheme object

Lifting scheme, specified as a liftingScheme object.

loc — Positions

positive integer | vector

Positions of the elementary lifting steps, specified as a positive integer or vector of positive integers specified in the range [1,N], where N is the number of steps in the lifting scheme.

Example: lschemeB = deletelift(lschemeA,[2 4]) deletes the second and fourth steps from the lifting scheme lschemeA.

Data Types: double

Output Arguments

lsn — Lifting scheme

liftingScheme object

Lifting scheme, returned as a liftingScheme object.

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using MATLAB® Coder™.

Version History

Introduced in R2021a