Patent ID: 9641830
Date: 2017-05-02
CPC Classifications: G06T,H04N

Claim:
1. A computer-implemented method of determining parameter values of a camera comprising: receiving an image of a 3-dimensional (3D) physical scene obtained from the camera, the image of the 3D physical scene including a calibration target comprising a plurality of unique fiducial markings; comparing, by the computer, the calibration target in the image to a computer model of the calibration target using at least one uniquely identified fiducial marking of the plurality of unique fiducial markings; for the at least one of the uniquely identified fiducial marking, estimating corresponding 3D coordinates in the 3D physical scene based on the comparison; and determining at least one parameter value of the camera using the estimated corresponding 3D coordinates; wherein the calibration target comprises a plurality of trihedral sections arranged around a central axis, each trihedral section having first, second and third surfaces with a window formed through at least one of the surfaces, each surface having at least one unique fiducial marker arranged on the surface.