This magnetic approach shares the same lack of occlusion problems with the audio method, but it also shares the same negative factors, such as the hindrance of cables, lack of sufficient receivers, and the limited capture area. This data is typically applied to an inverse kinematics system to drive an animated skeleton. The resulting data stream consists of 3D positions and orientations for each receiver. Each receiver is connected to an interface that can be synchronized to prevent data skew. These receivers are capable of measuring their spatial relationship to the transmitter. This popular method involves the use of a centrally located transmitter and a set of receivers that are strapped on to various parts of the performer’s body. This data is typically applied to an inverse kinematics system, to animate a skeleton. The computer is presented with each camera view in order to calculate a 3D position of each marker the resulting data stream therefore consists of 3D position data for each marker. Each camera is in turn connected to a synchronized frame buffer. Optical systems require at least three video cameras, each of which is equipped with a light source that is aligned to illuminate the field of view for that camera. Optical systems incorporate directionally reflective balls, referred to as markers, that attach to the performer. These systems can offer the performer the most freedom of movement since they do not require any cabling. Motion-capture data is typically acquired by one of several means:
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January 2023
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