Watch How Random Dots Take on Meaning in Delightfully Mathematic Video
"Freaky Dot Patterns" not quite freaky, but it sure is neat.
If you overlay a copy of random dots on itself, and then rotate it, magic — or, rather, a trick of geometry and pattern recognition — happens.
As Numberphile’s Tadashi Tokieda (who previously brought us the paper torus maneuver) explains, that concentric circles form out of noise are the logical result of Euclidean rotation. What happens when the patterns aren’t random? Well, take it away Tokieda: