Motion/Pursuit Ratio and Depth in 2D (Visual Depth Perception 18)

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The relative error in using instead of the motion/pursuit law is . This Demonstration interactively computes these ratios at time zero, a variable time, and the peak time.

Contributed by: Keith Stroyan (March 2011)
Open content licensed under CC BY-NC-SA



Experimental evidence suggests that people underestimate relative depth for distractors beyond the fixate () and overestimate closeness (or for distractors nearer than the fixate. The motion/pursuit ratio has this relationship to the motion/pursuit depth formula, so it is possible that the ratio alone is a better estimate of the perceived depth.

The dark gray graph on the left is and the transparent colored graph is . On the right, the light gray graph is the relative depth ; the colored graphs are and at the critical time where these quantities peak. For more on peak times see "Motion/Pursuit Law in 2D (Visual Depth Perception 3)" in Related Links.

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