Implementation of the Spatio-Temporal Hierarchical Matching Pursuit (ST-HMP) descriptor presented in the paper: M. Madry, L. Bo, D. Kragic, D. Fox, "ST-HMP: Unsupervised Spatio-Temporal Feature Learning for Tactile Data". In ICRA, 2014 (Download: http://www.nada.kth.se/~madry/publications/madry2014ICRA.pdf). Code was developed by Marianna Madry (marianna.madry@gmail.com) at the Royal Institute of Technology (KTH), Sweden and the University of Washington, WA, USA.