III. PROPOSED STR ATEGY
Controlling EPW via Head gesture and eye-tracking
(using camera to capture user face) should be able to deal
with the following uncertainty in the practical applications of
IWs:
• The user head may be out of the image view, or only
the profile face is in the captured image;
• The face color is user-dependent, and may change
dramatically in varying illumination conditions;
• The user may have different facial appearances, such as
mustache and glasses; and
• The background may be cluttered when IWs move in
the real world