ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,425,606, issued on Sept. 23, was assigned to National Tsing Hua University (Hsinchu, Taiwan).

"Method of sparse edge encoding for image" was invented by Hsiu-Hau Lin (Hsinchu, Taiwan) and Mei Ian Sam (Hsinchu, Taiwan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method of sparse edge encoding for an image is to be implemented by a computer. The computer stores an original image, and the original image has a plurality of pixels. The method includes a step of cross-correlating the pixels of the original image with a mask matrix to obtain a plurality of Laplacian charges (L-charges) respectively corresponding to the pixels. Those of the L-charges that ...