ALEXANDRIA, Va., July 16 -- United States Patent no. 12,361,588, issued on July 15, was assigned to Wuhan University of Science and Technology (Wuhan, China).

"Machine vision-based crystallizer nozzle centering method and system" was invented by Cancan Yi (Wuhan, China), Tao Huang (Wuhan, China), Han Xiao (Wuhan, China), Daiwei Bi (Wuhan, China), Yang Liu (Wuhan, China) and Lei Zhang (Wuhan, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A machine vision-based crystallizer nozzle centering method includes: S1, performing image acquisition on a tundish car lower nozzle and a crystallizer nozzle; S2, performing an edge enhancement using guide image filtering; S3, performing an edge extraction on a first ...