[h,g,a] = wfilt_optsymb(N);
[h,g,a]=wfiltdt_optsymb(N) with \(N \in {1,2,3}\) returns filters suitable with optimized symmetry suitable for for dual-tree complex wavelet transform tree B.
wfiltinfo('optsymb3');
B. Dumitrescu, I. Bayram, and I. W. Selesnick. Optimization of symmetric self-hilbertian filters for the dual-tree complex wavelet transform. IEEE Signal Process. Lett., 15:146--149, 2008.