invcubicbspline — It performs inverse cubicbspline integer wavelet transform
invfour2 — It performs inverse of (4,2) integer wavelet transform.
invfour2m — It performs the 2-d inverse of (4,2) integer wavelet transform
invintdb2 — db2 is called as Daubechies extremal phase wavelets. The number refers to the number of vanishing moments. This gives the reconstructed signal