12. A system for recognizing faces of persons, comprising: a training module configured to train a facial component recognition system to recognize a facial component; a population module configured to populate a first knowledge base with facial components and, for each facial component, the facial component's body part classification, wherein the facial components in the first knowledge base include a first set of facial components extracted from facial identification training image data of a face of a first person at a first set of viewpoints; a computer readable storage medium storing an indicator component module configured to: determine a first set of body part classifications associated with the first set of facial components; for each body part classification in the first set of body part classifications: determine, from the first set of facial components, a subset of facial components that are associated with the body part classification, wherein the facial components in the subset represent a same body part classification of a same person at multiple viewpoints; and determine a probability that a person class of the subset of facial components is the first person; and determine a first body part classification in the first set of body part classifications that maximizes the probability; and a processor configured to execute the indicator component module stored by the computer readable storage medium.
17. The system of claim 12 , wherein the indicator component module is further configured to determine the probability that the person class of the subset of facial components is the first person by: determining a first conditional probability, that a class is the first person, of a facial component of the subset of facial components at a first viewpoint; determining a first posterior probability, that a class is the first person, by multiplying the conditional probability at the first viewpoint by a prior probability, that a class is the first person; determining a second conditional probability, that a class is the first person, of a facial component of the subset of facial components at an additional viewpoint; and determining a second posterior probability, that a class is the first person, by multiplying the second conditional probability by the first posterior probability.