Name

wnoisest — Estimate noise of 1-D wavelet coefficients

Calling Sequence

STDC = wnoisest(C,L,S)

Parameters

S
: estimate noise for this decompostion levels
C
: coefficent array
L
: length array
STDC
: STDC(k) is an estimate of the standard deviation of C_k

Description

estimates of the detail coefficients' standard deviation for levels contained in the input vector S

Examples

   init = 2055415866; rand('seed',init);
   x = rand(1,1000,'normal');
   [c,l] = wavedec(x,2,'db3');

   wnoisest(c,l,1:2)

 

Authors

Holger Nahrstaedt

See Also

wavedec wden thselect