WIT Press


Unconstrained Pupil Detection Technique Using Two Light Sources And The Image Difference Method

Price

Free (open access)

Paper DOI

10.2495/VID950091

Volume

15

Pages

11

Published

1995

Size

948 kb

Author(s)

Y. Ebisawa

Abstract

For developing a human-computer interface applying eye-gaze, we have already proposed a noncontact, unconstrained video-based pupil detection technique using two light sources and the image difference method. The detected pupil position in the difference image is utilized together with the glint (corneal reflection light of an infrared light source) position for eye- gaze position determination. In this paper, the hardware for real-time im- age differentiation was developed. This image differenciator made real- time pupil possible, by applying the pupil detector including the noise re- ducer, which had been already developed. For stably detecting the glint and the pupil, it was clarified that the pupil brightness is influenced by the pupil area and the power of infrared l

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