motion tracking
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Researchers turn brushing your teeth into child's play
Kids -- they hate brushing their teeth. Sure, we try and show them pictures of zombie faces and toothless seniors, but it just doesn't work. Finally, someone has come up with a solution to the problem: make it fun. Researchers at the National Taiwan University have devised a scheme which turns brushing your teeth into a webcam-tracked video game. Using an LED-studded toothbrush, a camera mounted above a mirror, and an LCD display, kids can watch plaque and debris get annihilated from a cartoon mouth while they scrub their choppers. The system is able to track detailed, three-dimensional movement of the child's hand, covering 24 separate areas of the mouth. Kids who tested the system were found to brush twice as well as those who hadn't used it, but were also extremely cocky about their perfect teeth. Check the video after the break to see the magic happen.[Via Gizmo Watch]
Minute springs monitor controller motion
CNN reports on some of the motion-sensitive parts that make the PS3 and Wii controllers possible. These special sensors are based on tiny springs that make circuits when jolted, while sensitive meters measure the flow of electricity through the connection.How tiny are the parts? The silicon pieces that flex against the springs weigh about a millionth of a gram. And they only move slightly when the controller shakes -- the distance of 10 to 100 hydrogen atoms -- but their position can still be measured.The sensors have existed for years but were only recently cheap enough for games, at less than $1 per axis, making motion tracking the new arms race in game control. Will the 360 -- or next Xbox -- have motion control?
