Comparative analysis of lip features for person identification

Abstract

Humans unconsciously use visual cues from lip motion not only in aural conversations but also to communicate subtle emotions. In the past decades lip detection and segmentation has been extensively studied in various fields from speech recognition and human computer interaction to biometrics, but literature comparing visual lip features is almost non-existent. In this paper we present a comparative evaluation of different visual features from lips. Geometric and appearance based features were extracted and their relevance to identifying people was studied by feature selection methods.