[h,g,a] = wfiltdt_optsym(N);
[h,g,a]=wfiltdt_optsym(N) with \(N \in {1,2,3}\) returns filters suitable for dual-tree complex wavelet transform with optimized symmetry.
wfiltdtinfo('optsym3');
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.