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CDJVDyadDown

Downsampling with Boundary Correction

Calling Sequence

blo = CDJVDyadDown(bhi,F,LEF,REF)

Parameters

Inputs:

bhi:

1-d signal, at fine scale

F:

filter

LEF:

left edge filter bank

REF:

right edge filter bank

Outputs:

blo:

1-d signal, at coarse scale

Description

CDJV have developed an algorithm for wavelets on the interval which preserves the orthogonality, vanishing moments, smoothness and compact support of Daubechies wavelets on the line.

The CDJV algorithm for wavelets on the interval involves filtering combined with upsampling and downsampling, just like the algorithm on the line and circle. However, the filtering is not convolutional at the edges; instead special edge-filter matrices are applied. CDJVDyadDown implements the downsampling with edge-adjustment.

See also

Bibliography

CDJV -- Cohen, Daubechies, Jawerth and Vial, 1992.

Authors

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