Fundamentals of Wearable Computers and Augmented Reality, 2nd Edition

79Head-Mounted Display Technologies for Augmented Reality

image display. A user’s view as well as user’s gaze is important in analysis of user’s

interest, however, it has been difcult to acquire a wide parallax-free user’s view.

Mori etal. (2011) proposed a head-mounted eye camera that achieves this by using a

hyperboloidal semitransparent mirror (see Figure 4.11). Eye tracking is also achieved

by analyzing user’s eye images captured at the same time as user’s view. Corneal

image analysis is a promising alternative to this system for its simple hardware con-

guration, offering a variety of applications including calibration-free eye track