Available Technology

Method for extrinsic camera calibration using a laser beam

A method involves mounting a laser on a rotation device with azimuth and elevation degrees of freedom, locating the rotation device at a distance from the locations of two or more cameras, orienting each camera so the origin of a laser beam is imaged onto each camera, measuring the distance between each camera origin and the laser aperture, projecting the laser beam through a sequence of precisely determined azimuth and elevation orientations, using each camera collecting laser beam images as the laser is projected through the sequence, and using the laser beam images to determine a set of rotation matrices R and translation vectors T. Using R and T, a point in a laser coordinate frame is translated into a coordinate frame of each of the cameras or a point in a coordinate frame of one camera is translated into a coordinate frame of another camera.
Inventors: 

Charles S. Bendall

Patent Number: 
US9532031
Patent Issue Date: 
January 27, 2017
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