Design of orthogonal near-symmetric scaling filters by using differential evolution
Jouni Sampo · 2005
The use of differential evolution in the design of a near-symmetric orthogonal scaling filter is studied. Parametrization is used for maintaining the orthogonality while the symmetry and moment conditions are optimized. Several near-symmetric scaling filters have been found and the results are compared with filters found by Grobner basis method. Especially a very near-symmetric and smooth 8-tap orthogonal filter is constructed.