ALEXANDRIA, Va., Feb. 17 -- United States Patent no. 12,555,351, issued on Feb. 17, was assigned to MACAU UNIVERSITY OF SCIENCE AND TECHNOLOGY (Macau).

"Method, system and device for copy-paste tampered image detection" was invented by Zhiyao Liang (Macau), Jixiang Yang (Macau) and Jianqing Li (Macau).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for a copy-paste tampered image detection, including: extracting, using a scale-invariant feature transformation algorithm, key points of an image and features corresponding to the key points; constructing, using a gradient hash matching algorithm, a hash table based on the features, and putting the key points into rows corresponding to serial numbers of th...