US 12,425,606 B2
Method of sparse edge encoding for image
Hsiu-Hau Lin, Hsinchu (TW); and Mei Ian Sam, Hsinchu (TW)
Assigned to National Tsing Hua University, Hsinchu (TW)
Filed by National Tsing Hua University, Hsinchu (TW)
Filed on Aug. 9, 2023, as Appl. No. 18/447,087.
Claims priority of application No. 112108532 (TW), filed on Mar. 8, 2023.
Prior Publication US 2024/0305787 A1, Sep. 12, 2024
Int. Cl. H04N 19/14 (2014.01); H04N 19/182 (2014.01)
CPC H04N 19/14 (2014.11) [H04N 19/182 (2014.11)] 4 Claims
OG exemplary drawing
 
1. A method of sparse edge encoding for an image, the method to be implemented by a computer storing an original image, the original image having a plurality of pixels, the method comprising 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, wherein those of the L-charges that correspond to those of the pixels which represent an edge of an object in the original image have greater absolute values than other L-charges of the L-charges, and wherein the mask matrix is a square matrix, and a sum of all elements of the mask matrix is zero.