A Study on Characteristics of Biorthogonal Two-Dimensional Wavelet Packets
Wavelet analysis is a popular subject in science research. The notion of univariate orthog- onal wavelet packets is generalized. The definition of biorthogonal nonseparable two-dimensional wavelet packets is presented and a procedure for constructing them is proposed. The biorthogonality property of bivariate wavelet packets is investigated. Two biorthogonality formulas regarding these wavelet packets are established.
D. Y. Song and X. F. Wang, "A Study on Characteristics of Biorthogonal Two-Dimensional Wavelet Packets ", Key Engineering Materials, Vols. 439-440, pp. 1159-1164, 2010