Dynamic Iris Authentication by High-speed Gaze and Focus Control

Iris is an advantageous feature of biometric authentication that can be measured without contact and low possibility of damage and change. Conventional iris authentication systems, however, require approach to measurement devices or stationary of users due to necessity of the iris image with sufficient resolution, which reduces time efficiency of the authentication. In this paper, we propose a dynamic iris authentication system using high-speed gaze and focus control by high-speed image processing. We control high-speed rotational mirrors and liquid-based variable focus lens by triangulation with a wide-angle camera. We also control the liquid lens with additive modulation of sine wave to get the most focused iris image. We have experimentally evaluated the sufficient focus measure around eyes of static and dynamic users, and confirmed successful iris authentication.