ALEXANDRIA, Va., June 17 -- United States Patent no. 12,313,561, issued on May 27, was assigned to Casi Vision Technology (Beijing) Co. Ltd. (Beijing) and Casi Vision Technology (Luoyang) Co. Ltd. (Luoyang, China).

"Stroboscopic stepped illumination defect detection system" was invented by Xiaosong Hu (Luoyang, China), Bing Pian (Luoyang, China), Wujie Zhang (Luoyang, China), Hao Deng (Luoyang, China) and Chenglin Zhang (Luoyang, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A stroboscopic stepped illumination defect detection system for appearance defect detection of a product is provided. The system includes an image extraction unit, a brightness adjustment unit, a data processing unit, and a strobo...