Head-pose invariant recognition of facial expressions

摘要

A system facilitates automatic recognition of facial expressions. The system includes a data access module and an expression engine. The expression engine further includes a set of specialized expression engines, a pose detection module, and a combiner module. The data access module accesses a facial image of a head. The set of specialized expression engines generates a set of specialized expression metrics, where each specialized expression metric is an indication of a facial expression of the facial image assuming a specific orientation of the head. The pose detection module determines the orientation of the head from the facial image. Based on the determined orientation of the head and the assumed orientations of each of the specialized expression metrics, the combiner module combines the set of specialized expression metrics to determine a facial expression metric for the facial image that is substantially invariant to the head orientation.

主权项

1. A computer-implemented system for automatically recognizing facial expressions, the system comprising:
a data access module for accessing a facial image of a head; and an expression engine for determining a facial expression metric for the facial image from the facial image; wherein the expression engine comprises:
a set of specialized expression engines for determining a set of specialized expression metrics that are an indication of the facial expression of the facial image, wherein the set of specialized expression metrics varies with orientation of the head; anda combiner module for combining the set of specialized expression metrics to determine the facial expression metric, wherein the facial expression metric is an indication of a facial expression of the facial image.