3. The method of claim 2 , wherein the first body part classification and the second body part classification are different.
2. The method of claim 1 , wherein the facial components in the first knowledge base further include a second set of facial components extracted from facial identification training image data of a face of a second person at a second set of viewpoints, and wherein the method further comprises: determining a second set of body part classifications associated with the second set of facial components; for each body part classification in the second set of body part classifications: determining, from the second set of facial components, a subset of facial components that are associated with the body part classification; and determining a probability that a person class of the subset of facial components is the second person; and determining a second body part classification in the second set of body part classifications that maximizes the probability.