Machine vision system calibration using inaccurate calibration targets

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United States of America Patent

PATENT NO 10032273
SERIAL NO

13835759

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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Described are methods, systems, and apparatus, including computer program products for calibrating machine vision systems. A system includes: one or more cameras; a motion rendering device; and a calibration module. The calibration module is configured to acquire, from a first camera of the one or more cameras, a plurality of images of a calibration target comprising a calibration pattern that provides a plurality of calibration features; extract calibration features of the plurality of calibration features from the plurality of images, wherein physical positions of the plurality of calibration features are in a calibration target length unit associated with the calibration target; determine a ratio between the calibration target length unit and a motion rendering device length unit associated with the motion rendering device; and provide a first calibration for the first camera based on the ratio.

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Patent Owner(s)

  • COGNEX CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Li, David West Roxbury, US 75 665
Liu, Gang Natick, US 575 5564
Wang, Lei Wayland, US 2169 19344

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