A New Series of Biorthogonal Wavelet Filters For
Min Zhao, Yong Sheng Zhao · 2000
Abstmct- A technique for deriving a new series of symmetric biorthogonal wavelets from a given symmetric regular Alter is presented. The main idea is to And a symmetric complementary regular Alter of the given Alter which has the least square amplitude deviation from the ideal halfband Alter. Thus from given regular symmetric Alter, or from a known symmetric biorthogonal wavelet, a new series of symmetric biothogonal wavelet Alter banks with better frequency selectivity can easily be designed. Once the complementary filter is found out, another complementary filter of this complementary Alter can again be obtained in the same way. Particularly, a new series of biorthogonal wavelet Alters are derived from the standard Anotonini 9/7 biorthogonal wavelets. Applying these wavelet to Alters to compression of the well known images of Lena, Barbara and Goldhill, etc, improved results in PSNR, are achieved.