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Stereo Vision

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Stereo Vision

PG3D

A commonly used 3D system is stereo imaging where two cameras are used to capture two separate images of a scene from two different positions. The location and optical parameters of each camera must be calibrated so that triangulation methods can be used to determine the correspondence between pixels in each image. Depth in the scene can be computed since the depth of each point is inversely proportional to the difference in the distance of the corresponding points and their camera centers. Positional and optical parameters of the two cameras must be accurately calibrated. An increasing number of pre-calibrated products such as from Point Grey are available and are often used to solve issues regarding safety, volume measurement and gripping objects with a robot.