ALEXANDRIA, Va., Feb. 24 -- United States Patent no. 12,560,454, issued on Feb. 24, was assigned to Creaform Inc. (Quebec, Canada).

"Method and system for maintaining accuracy of a photogrammetry system" was invented by Marc Viala (Varces-Allieres-et Risset, France), Eric St-Pierre (Levis, Canada) and Laurentiu Trifan (Grenoble, France).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method and a system are disclosed for maintaining accuracy of a photogrammetry system comprising a stereo pair of cameras and characterized by calibration parameters determined at initialization, the system for tracking one of a touch probe and a 3D sensor, the method comprising in use, continuously detecting a presence of a red...