FTWT2_PO {rwavelet}

2-d tensor 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 ITWT2_PO.

Usage

FTWT2_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

ITWT2_PO, MakeONFilter.

Examples

qmf <- MakeONFilter('Daubechies', 10)
L <- 0
x <- matrix(rnorm(2^2), ncol=2)
wc <- FTWT2_PO(x, L, qmf)