Measurement Method of Pupil Diameter using Visible-light Camera

Abstract

The various systems using the information of pupil diameter variation have been studied and developed, e.g. gaze measurement and the estimation of interest. These systems are presupposed to be operated on the PC or portable terminal. To measure the pupil diameter, a near-infrared camera and illumination are required. However, the conventional PC or portable terminal does not have a near-infrared camera and illumination. In this study, for the generalization of the systems using the information of pupil diameter variation, we proposed the measurement method of the pupil diameter from the image taken by a visible-light camera. From the experimental results, the accuracy of proposed method was equivalent to that of the conventional method of pupil diameter using a near-infrared camera and illumination.