Aboozar Ghafari Massoud Babaie-Zadeh Christian Jutten Sparse decomposition of two dimensional signals. 3157-3160 2009 ICASSP http://dx.doi.org/10.1109/ICASSP.2009.4960294 conf/icassp/2009 db/conf/icassp/icassp2009.html#GhafariBJ09