The Effects on Perception and Performance When Image Resolution Drops
What happens to perception and performance
when image filtering goes beyond the limits of visual resolution and
removes otherwise perceptible information? Doing so creates image blur,
which can affect where viewers look in scenes. Our studies have shown
that image blur that is only moderately detectable appears to have
little or no effect on perception and task performance. However, there
is a blur threshold, beyond which eye movements are affected, creating
a sort of ‘tunnel vision’— which should be avoided in
most gaze-contingent multi-resolutional display applications. On the
other hand, this blur threshold for affecting eye movements could be
used to focus viewers?attention in particular image areas in the same
way that depth of field is used in photography and cinema to focus
viewers?attention on an object of interest.
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