**Name**

**istkwave1** Reconstruction of a signal from its wavelet coefficients using Starck's algorithm

**Command Synopsis**

**istkwave1** *np* *in* *out*

np: resolution np

in: decomposition of a signal in wavelets (2N coefficients)

out: signal (N elements)

**Function Summary**

void istkwave1 (np , in , out )

Fsignal in , out ;

int np ;

**Description**

The module `istkwave1` reconstructs a one-dimensional signal of size *N* from its one dimensional wavelet decomposition according to the J.L. Starck's algorithm [SBLP94] for a resolution *np*.

As long as the filters G and H verify *G* = 1 - *H*, we just need to add details and approximation for a resolution *np* in the frequency domain to get the signal back:

() = () + ().

See documentation of module `stkwave1` for more details.

**See Also**

**Version 1.0**

Last Modification date : Thu Apr 15 08:03:52 2004

**Author**

Claire Jonchery, Amandine Robin