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Integer_Wavelet_Transform_ToolBox >> Integer_Wavelet_Transform_ToolBox > invfour2

invfour2

It performs inverse of (4,2) integer wavelet transform.

Calling Sequence

y = invfour2(a,d)

Arguments

a

A 1-d signal representing the approximation part.

d

A 1-d signal representing the detail part.

y

A 1-d vector representing the reconstructed signal. Its length is twice the length of approximation or detail part.

Description

It performs the reconstuction of a signal from its approximation and detail parts.The first two inputs corresponds to the approximation and the detail parts.

Examples

// input 
x=[3 5 2 6 7 1 9];
// approximation and detail parts 
[a,d]=four2(x);

// gives a=[9.  10.  6.  0. ] and d=[7.  6.  8.  9.]

// Reconstruction 
y=invfour2(a,d);

// gives y= [3.    5.    2.    6.    7.    1.    9.    0.]

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