ALEXANDRIA, Va., Feb. 17 -- United States Patent no. 12,555,449, issued on Feb. 17, was assigned to SIGMASTAR TECHNOLOGY LTD. (Fujian, China).

"Intrusion detection method and intrusion detection device" was invented by Xiang Wei Lin (Xiamen, China), Fei Yang Tong (Xiamen, Switzerland), Jing Song Rao (Xiamen, China) and Cheng Wei Zheng (Xiamen, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "An intrusion detection method includes steps of obtaining a current detection box and a historical detection box of a target in an input image; determining whether the current detection box has an intersection with a security line or a security area; determining that the target has an intrusion behavior if the curren...