Motion/Pursuit Law on Invariant Circles (Visual Depth Perception 4)
Motion/Pursuit Law on Invariant Circles (Visual Depth Perception 4)
This Demonstration computes the motion/pursuit law in the two-dimensional horizontal "fixation plane" of the eyes. The observer is looking mainly at F on the vertical axis, but also sees D as she translates to the right at 6.5 cm/sec (interocular distance per second). The distractor can be moved off the axis around the time zero invariant circle.
d
1
We do not know a theoretical explanation for the rough approximation of the peak motion/pursuit law by the 2D relative distance, but this Demonstration compares (0), (), and the 2D signed relative distance, . It also lets you vary time and compare the motion/pursuit law at other times.
dθ
dβ
dθ
dβ
t
c
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|D-F|
f