ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,770,274, issued on Oct. 20, was assigned to AXIS AB (Lund, Sweden).

"Method and system for detecting a change of ratio of occlusion of a tracked object" was invented by Niclas Danielsson (Lund, Sweden) and Anton Ohrn (Lund, Sweden).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method of detecting a change of ratio of occlusion of a tracked object in a video sequence. For each of a plurality of image frames, a bounding box of the tracked object is determined and for each pair of successive image frames, an intersection over union (IoU) of a first bounding box in a first image frame and a second bounding box in a second image frame is calculated. Simila...