Riesz wavelet pyramid
Matlab code for the Riesz wavelet pyramid, a tight steerable wavelet frame for advanced image analysis. This work is in collaboration with Prof. Michael Unser of the BIG; here is their page on this topic.
 M. Unser, N. Chenouard, D. Van De Ville, "Steerable Pyramids and Tight Wavelet Frames in L2(ℝd)", IEEE Transactions on Image Processing, vol. 20, no. 10, pp. 2705-2721, October 2011.
 M. Unser, D. Sage, D. Van De Ville,"Multiresolution Monogenic Signal Analysis Using the Riesz-Laplace Wavelet Transform", IEEE Transactions on Image Processing, vol. 18, no. 11, pp. 2402-2418, November 2009.
There is also Matlab code for the use of Riesz steerable wavelets for rotation-covariant texture learning, maintained by Adrien Depeursinge, as in the following paper
 A. Depeursinge, A. Foncubierta-Rodriguez, D. Van De Ville, H. Muller, "Rotation-Covariant Feature Learning Using Steerable Riesz Wavelets", IEEE Transactions on Image Processing, 2014, 23, 898-908.