US Patent Issued to QIQIHAR UNIVERSITY on July 28 for "NSCT-UPEMD-PHT based robust zero-watermarking algorithm and system" (Chinese Inventors)

ALEXANDRIA, Va., July 28 -- United States Patent no. 12,694,077, issued on July 28, was assigned to QIQIHAR UNIVERSITY (Qiqihar City, China).

"NSCT-UPEMD-PHT based robust zero-watermarking algorithm and system" was invented by Guangda Zhang (Qiqihar City, China), Bo Yang (Qiqihar City, China), He Liu (Qiqihar City, China), Wenxin Deng (Qiqihar City, China), Yichen Han (Qiqihar City, China), Jingyou Li (Qiqihar City, China), Haichuan Yu (Qiqihar City, China), Zixin Yang (Qiqihar City, China), Bangdong Wu (Qiqihar City, China) and Qingxue Jia (Qiqihar City, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A non-subsampled contourlet transform (NSCT)-uniform phase empirical mode decomposition (UPEMD)-polar ...