FWT2_PO {rwavelet}

2-d MRA Forwad Wavelet Transform (periodized, orthogonal)

Description

A two-dimensional wavelet transform is computed for the array x. qmf filter may be obtained from MakeONFilter. To reconstruct, use IWT2_PO.

Usage

FWT2_PO(x, L, qmf)

Arguments

x

2-d image (n by n array, n dyadic).

L

coarse level.

qmf

quadrature mirror filter.

Value

wc 2-d wavelet transform.

See Also

IWT2_PO, MakeONFilter.

Examples

qmf <- MakeONFilter('Daubechies', 10)
L <- 3
x <- matrix(rnorm(128^2),ncol=128)
wc <- FWT2_PO(x, L, qmf)