Abstract
Visual displays used in nighttime driving and some other
applications require low luminances. Visual performance under
mesopic light levels is not well characterized using
conventional photopic photometric quantities. Response times to
flashed decrement targets against colored backgrounds on a
computer monitor display were systematically shorter for blue
than for red backgrounds. Responses were consistent with a
unified system of photometry that models the relative
contributions of rod and cone photoreceptors at mesopic light
levels. The empirical data and unified photometric system can
have practical application for the design of displays in
low-light applications.
© 2011 IEEE
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