Inverse 2d Wavelet Transform (periodized, biorthogonal)
x = IWT2_PB(wc,L,qmf,dqmf)
2-d wavelet transform [n by n array, n dyadic]
coarse level
quadrature mirror filter
dual quadrature mirror filter
2-d signal reconstructed from wc
If wc is the result of a forward 2d wavelet transform, with wc = FWT2_PB(x,L,qmf,dqmf) then x = IWT2_PB(wc,L,qmf,dqmf) reconstructs x exactly if [qmf,dqmf] is a nice pair of quadrature mirror filters, e.g. one made by MakeBSFilter.