the preprocessing algorithms, we suspect that much of the improvement is due to similarities between the transformations we handle and differences between images. For example, a smile is probably something like a dilation in the horizontal direction.
This work was supported by a LANL 2002 Homeland defense LDRD-ER (PI K. Vixie) and a LANL 2003 LDRD-DR (PI J. Kamm).
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