Iris Recognition in the Visible Wavelength

Abstract

The human iris supports contactless data acquisition and can be imaged covertly. Thus, at least theoretically, the subsequent biometric recognition procedure can be performed without subjects' knowledge. The feasibility of this type of recognition has received increasing attention and is of particular interest for forensic and security purposes, such as the pursuit of criminals and terrorists and the search for missing children. Among others, one active research area sought to use visible wavelength (VW) light imagery to acquire data at significantly larger distances than usual and on moving subjects, which is a difficult task because this real-world data is notoriously different from the one used in the near infra-red (NIR) setup. This chapter addresses the feasibility of performing reliable biometric recognition using VW data acquired under dynamic lighting conditions and unconstrained acquisition protocols: with subjects at large distances (between 4 and 8 meters) and on-the-move.