3D GeometryFilter: Is there a mathematical equation that defines relative lengths of objects at different depths of field for humans?
May 16, 2009 3:07 PM Subscribe
Is there an equation that defines the change in apparent size as a function of distance from the viewer? Basically, if I'm looking at a set of railroad tracks head on, if one plank is like 10 ft away, it appears to be one size. The same plank 20 ft away appears smaller. What is the relative size difference? Put another way, how big does a 1ft line appear to be at 10 ft, at 20 ft, etc.?
posted by miasma to Media & Arts (15 answers total) 2 users marked this as a favorite
Furthermore, is there an angle of convergence? Just like the planks on a railroad track will converge to a single point, if i wanted two planks at different distances to appear to be in the same overlapping plane, where would I need to place them?