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Wavelab Toolbox >> Wavelab Toolbox > 2-d Wavelet- and Cosine- Packet Tools > Calc2dSQTree

Calc2dSQTree

Put Packet Table Statistics into Quad Tree

Calling Sequence

SQTree = Calc2dSQTree(pkt2,D,Entropy[,EntPar])

Parameters

Inputs:

pkt2 :

2-d packet table, depth log_2(n)

D :

maximum depth of splitting

Entropy:

type of entropy to record in tree: options are

Entropy= 'Entropy':

-- Coifman-Wickerhauser

Entropy= 'Log':

-- sum log |th_i|

Entropy= 'l^p':

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

Entropy= 'N(eps)':

-- #>= eps, eps = par

Entropy= 'Risk' :

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

Entropy= 'Sum' :

-- sum th_i

Entropy= 'SURE' :

-- SURE(Thresholding), thresh = par

EntPar :

extra parameter, depends on type of entropy

Outputs:

SQTree:

quad tree filled entropy numbers. SQTree(qnode(d,bx,by)) contains entropy of quadlet(d,bx,by,n)

Authors

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