IWT2_PO {rwavelet}

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

Description

If wc is the result of a forward 2d wavelet transform, with wc <- FWT2_PO(x,L,qmf). then x <- IWT2_PO(wc,L,qmf) reconstructs x exactly qmf is a nice qmf, e.g. one made by MakeONFilter.

Usage

IWT2_PO(wc, L, qmf)

Arguments

wc

2-d wavelet transform (n by n array, n dyadic).

L

coarse level.

qmf

quadrature mirror filter.

Value

x 2-d signal reconstructed from wc.

See Also

FWT2_PO, MakeONFilter.

Examples

qmf <- MakeONFilter('Daubechies', 10)
L <- 3
x <- matrix(rnorm(128^2),ncol=128)
wc <- FWT2_PO(x, L, qmf)
xr <- IWT2_PO(wc,L,qmf)