Xin Pan Qiuqi Ruan Yanxia Wang An Improved 2DLPP Method on Gabor Features for Palmprint Recognition. II:413-416 2007 ICIP (2) https://doi.org/10.1109/ICIP.2007.4379180 conf/icip/2007 db/conf/icip/icip2007.html#PanRW07