ALEXANDRIA, Va., April 9 -- United States Patent no. 12,272,074, issued on April 8, was assigned to SHANDONG UNIVERSITY (Jinan, China).

"Method and system for converting trajectory coordinates of moving objects" was invented by Xu Wang (Jinan, China), Fei Ma (Jinan, China), Rongjian Dai (Jinan, China) and Tong Zhou (Jinan, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a method and system for converting trajectory coordinates of moving objects, including: capturing a video of moving objects by drone; extracting trajectory data of moving objects in pixel coordinate system; solving a representation of unit direction vector corresponding to target point in camera coordinate system in ECEF coor...