Ashish Kapoor Kristen Grauman Raquel Urtasun Trevor Darrell Active Learning with Gaussian Processes for Object Categorization. 1-8 2007 ICCV http://dx.doi.org/10.1109/ICCV.2007.4408844 conf/iccv/2007 db/conf/iccv/iccv2007.html#KapoorGUD07