Bayesian Modeling of Facial Similarity
نویسندگان
چکیده
In previous work [6, 9, 10], we advanced a new technique for direct visual matching of images for the purposes of face recognition and image retrieval, using a probabilistic measure of similarity based primarily on a Bayesian (MAP) analysis of image di erences, leading to a \dual" basis similar to eigenfaces [13]. The performance advantage of this probabilistic matching technique over standard Euclidean nearest-neighbor eigenface matching was recently demonstrated using results fromDARPA's 1996 \FERET" face recognition competition, in which this probabilistic matching algorithm was found to be the top performer. We have further developed a simple method of replacing the costly compution of nonlinear (online) Bayesian similarity measures by the relatively inexpensive computation of linear (o ine) subspace projections and simple (online) Euclidean norms, thus resulting in a signi cant computational speed-up for implementation with very large image databases as typically encountered in real-world applications.
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