@inproceedings{SraCTDM2011, title = {Generalized Dictionary Learning for Symmetric Positive Definite Matrices with Application to Nearest Neighbor Retrieval}, author = {Sra, S. and Cherian, A.}, booktitle = {Machine Learning and Knowledge Discovery in Databases - European Conference, ECML PKDD 2011, LNCS vol 6913, Part III}, pages = {318-332}, editors = {D Gunopulos and T Hofmann and D Malerba and M Vazirgiannis}, publisher = {Springer}, year = {2011}, doi = {10.1007/978-3-642-23808-6_21} }