IMAGE ENHANCEMENT AND FEATURE EXTRACTION FOR OCULAR-VASCULAR AND FACIAL RECOGNITION

摘要

Biometric enrollment and verification techniques for ocular-vascular, periocular, and facial regions are described. Periocular image regions can be defined based on the dimensions of an ocular region identified in an image of a facial region. Feature descriptors can be generated for interest points in the ocular and periocular regions using a combination of patterned histogram feature descriptors. Quality metrics for the regions can be determined based on region value scores calculated based on texture surrounding the interest points. A biometric matching process for calculating a match score based on the ocular and periocular regions can progressively include additional periocular regions to obtain a greater match confidence.

主权项

1. A computer-implemented method comprising:
receiving an image of a facial region of a user, the facial region including an eye and an area surrounding the eye; processing the image to: (i) define an ocular image region including at least a portion of the eye in the image of the facial region and (ii) define one or more periocular image regions each including at least a portion of the area surrounding the eye in the image of the facial region; identifying a plurality of points of interest in at least one of the ocular image region and the one or more periocular image regions; generating, for each point of interest, a feature descriptor based on a combination of a plurality of patterned histogram feature descriptors; and storing the generated feature descriptors in a biometric template.