ALEXANDRIA, Va., June 25 -- United States Patent no. 12,341,869, issued on June 24, was assigned to DALIAN UNIVERSITY (Liaoning, China).
"Method for encrypting visually secure image" was invented by Qiang Zhang (Dalian, China), Bin Wang (Dalian, China), YuanDi Shi (Dalian, China) and XiaoPeng Wei (Dalian, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure discloses a method for encrypting a visually secure image based on adaptive block compressed sensing and non-negative matrix decomposition. Firstly, the Tetrolet transform is performed on the plain image, then the sparsity degree is optimized on the sparsity matrix and the matrix scrambling is performed, such that the sparsity degre...