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Active-Optical Mocap from Ascension.(Company Business and Marketing)

Computer Graphics World

| June 01, 2001 | JD | COPYRIGHT 2001 PennWell Publishing Corp. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan.  All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)Copyright

Ascension's $75,000 ReActor system uses active-optical technology to capture the motions of a single untethered performer and outputs the motion data in real time. The system's motion-capture area is delineated by a "cage" of bars embedded with a total of 480 electronic cameras that detect the infra-red (IR) markers worn by the performer. The performer, wearing a suit with 30 markers, is able to move freely within an area 3 meters high by 3 meters wide by 4 meters deep.

ReActor's active-optical technology is a departure for Ascension, which has traditionally developed magnetic-based systems. (The ReActor technology was recently acquired from a UK-based firm.) It is also a departure from the passive-optical mocap more commonly seen in the market in which send-and-receive roles are reversed--the performer's markers pick up signals from surrounding hardware. Active-optical technology results in cleaner data, according to the company, because the 480 cameras all but prevent occlusions. In addition, the ReActor system ...

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