<< CPTour One-d Wavelet- and Cosine- Packet Tools CalcTreeHeight >>

Wavelab Toolbox >> Wavelab Toolbox > One-d Wavelet- and Cosine- Packet Tools > CalcStatTree

CalcStatTree

Build tree with entropy numbers

Calling Sequence

stree = CalcStatTree(pkt,ent[,par])

Parameters

Inputs:

pkt :

packet table [wavelet or cosine packet] (n x L)

ent :

type of entropy to use: options are

ent = 'Entropy':

-- Coifman-Wickerhauser

ent = 'Log' :

-- sum log(abs(th_i))

ent = 'l^p' :

-- sum |th_i|^p, 0 < p < 2, p = par

ent = 'N(eps)' :

-- #>= eps, eps = par

ent = 'Risk' :

-- sum min(th_i^2,eps^2), eps=par

ent = 'Sum' :

-- sum th_i

ent = 'SURE' :

-- SURE(Thresholding), thresh = par

par :

extra parameter, depends on type of entropy

Outputs:

stree:

stat tree of entropy numbers. tree(node(d,b)) contains entropy of packet(d,b,n)

Description

A packet table is indexed by depth, block within depth, and coefficient within block. A stat tree summarizes the coefficients within a particular block at a given depth with an entropy measure based on the coefficients.

See also

Authors

<< CPTour One-d Wavelet- and Cosine- Packet Tools CalcTreeHeight >>