Spectacles detection method

摘要

The presence of spectacles (24) worn by a human subject (16) is detected regardless of whether the subject's head is viewed frontally or in profile. Image data within search windows (60-68) defined relative to the subject's eye (22) is processed to form linear representations of edge boundaries (94). Angles formed by intersections of the linear representations are determined (152,160) and used as a basis for determining if spectacle lenses (24a-24b) are present. When prescribed eyeglass components (24a-24g) are detected, the eye detection and tracking routines are configured accordingly (150,136).