Motion/Pursuit Ratio and Depth in 1D (Visual Depth Perception 17)

maximum motion/pursuit

r

The relative error in using

r=dθ/dα

instead of the motion/pursuit law

dθ/dβ=r/(1-r)

is

(r-r/(1-r))/(r/(1-r))=-r

. This Demonstration interactively computes the error.