Cao A; Schiller PH
Vision Research,
42 (16), 1953-1961.
Abstract
Although human psychophysical results show that motion parallax and stereopsis
are both effective depth cues, it is not clear whether the same is true for
non-human primates. As an initial step, we assessed the extent to which rhesus
monkeys are capable of processing depth information based solely on motion parallax
as compared with stereopsis. We constructed a unique display that enabled us
to provide depth cues by either stereopsis or motion parallax or both. Our results
show that monkeys can process depth information conveyed both by motion parallax
and stereopsis. As in humans, motion parallax was somewhat less effective for
depth discrimination than was stereopsis. These findings prepare efforts for
assessing how motion parallax and stereopsis are co-processed in the visual
system.