Psychologists at the University of Pennsylvania and the University of Texas at Austin have reversed this process. Operating more like physicists, they analyzed all of the steps involved in estimating how fast an object is moving, from light bouncing off the object, passing through the eye’s lens, hitting the retina and transmitting information to the brain through the optic nerve, in order to build an optimal model.
The research is in Nature Communications. (full open access)
Research: “Optimal speed estimation in natural image movies predicts human performance” by Johannes Burge and Wilson S. Geisler in Nature Communications doi:10.1038/ncomms8900
Image: Speed of retinal image motion in a natural scene for an observer walking briskly to the left at 3 miles per hour. Credit: The researchers/Nature Communications.