This data is related to the following publications Fast Orthonormal Sparsifying Transforms Based on Householder Reflectors, Cristian Rusu, Nuria González-Prelcic and Robert W. Heath published in IEEE Transactions on Signal Processing, Volume: 64,Issue: 24, 6589 - 6599, 2016. Learning Fast Sparsifying Transforms, Cristian Rusu and John Thomson Matlab Demo Code for Learning Sparsifying Transforms on Image Data