Abstract
Head-up displays (HUDs) enable a pilot to manage aircraft activities by facilitating simultaneous
access to the flight instrument data and to the outside scene. However, HUDs can also distract a pilot. This
study shows that HUD luminance non-uniformity may force inappropriate distribution of attention between the
events shown on HUD symbology and the outside scene because of the resultant differential contrast in the
display area. Results of statistical analysis demonstrate considerable effects of HUD image luminance and
ambient luminance, as well as their interaction, on the detection of events displayed on an HUD and the
outside scene.
© 2014 Chinese Optics Letters
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