Communications of the ACM
Computer Scientists Reveal How Aquatic Olympic Gold Is Captured--Above and Below the Surface
Courant's Chris Bregler and his NYU team have isolated the movements of Olympic swimmers and divers through a cutting-edge technique that reveals their motions above and below the waters surface. Pictured above is U.S. swimmer Dana Vollmer, who captured
Credit: NYU
New York University (NYU) researchers followed Olympic swimmers and divers during their training sessions and used motion-capture techniques to reveal their movement above and below the water's surface.
The researchers at NYU's Movement Laboratory worked with Manhattan Mocap and the New York Times to analyze gold medalist Dana Vollmer, silver medalist Abby Johnston, and bronze medalist Nicholas McCrory.
The team created the AquaCap system to capture underwater motion. It was used to display Vollmer's butterfly stroke and underwater dolphin kick, deconstructing the technique the swimmer used to win the gold medal in the 100-meter butterfly in world-record time. Existing motion-capture technology records the movements of individuals, who wear suits that reflect light to enable the recording of their actions. The technology then translates the movements into digital models for three-dimensional animation. The NYU team developed computer-vision technology that allows for the tracking and recording of people's movements straight from video and without the use of motion-capture suits.
From New York University
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