@conference {SHI04, title = {Invariant Operators, Small Samples, and the Bias-Variance Dilemma}, booktitle = {Proceedings of the IEEE Conference on Computer Vision and Pattern Recognition (CVPR 04)}, year = {2004}, address = {Washington, D.C.}, url = {http://users.soe.ucsc.edu/~manduchi/papers/Shi_X.pdf}, author = {X. Shi and Roberto Manduchi} }