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

UpQuad

Merge four subbands into 2d image

Calling Sequence

Q = UpQuad(quad,qmf,xbit,ybit)

Parameters

Quad :

quadlet to be joined 4->1 channel

qmf :

orthogonal quadrature mirror filter

xbit :

x-position of quadlet in 2-d freq plane

ybit :

y-position of quadlet in 2-d freq plane

Outputs:

q :

quadlet after splitting

Description

A 2-d signal split into four channels: (Lo_x,Lo_y), (Lo_x,Hi_y), (Hi_x,Lo_y), (Hi_x,Hi_y) is unsplit into original image.

This routine is called by other, higher-level WaveLab functions and may not be useful for many users.

See also

Authors

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