Lip Print: An Emerging Biometrics Technology - A Review

Biometrics is often referred to a metric related to human features and characteristics. When utilized for authentication and verification purpose, a live biometric is compared against a stored template of enrolled users to produce a match. Most popularly used biometric technologies are fingerprints based identification, face recognition, voice/speech recognition, iris recognition and so on. Research shows that lip-imprints are one of a kind to every person and they don't change during their entire life time. Like other biometrics, lip-prints can also be used as a tool to effectively identify a person. Identifying a person through lip prints is termed as Cheiloscopy. Cheiloscopy is slowly gaining popularity throughout the world. However, very little work is done on lip-prints based identification so far. The aim of this review work is to identify various techniques to use lip-prints as a biometric and also to determine the drawbacks of the existing techniques in terms of complexity, scalability and efficiency. The comparative analysis of the identified techniques is presented as the outcome of this survey. The related work and the scope for future research in this context is also discussed.