US 11,727,540 B2
Image sharpening
Zhen Tong, Allen, TX (US); Yibo Xu, Plano, TX (US); John W. Glotzbach, Allen, TX (US); Hamid R. Sheikh, Allen, TX (US); Ruiwen Zhen, Allen, TX (US); and Baekdu Choi, West Lafayette, IN (US)
Assigned to Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Dec. 31, 2020, as Appl. No. 17/139,880.
Prior Publication US 2022/0207658 A1, Jun. 30, 2022
Int. Cl. G06T 5/00 (2006.01); G06T 7/13 (2017.01); G06T 5/50 (2006.01); G06T 5/20 (2006.01)
CPC G06T 5/003 (2013.01) [G06T 5/002 (2013.01); G06T 5/009 (2013.01); G06T 5/20 (2013.01); G06T 5/50 (2013.01); G06T 7/13 (2017.01); G06T 2207/20192 (2013.01); G06T 2207/20208 (2013.01); G06T 2207/20221 (2013.01)] 36 Claims
OG exemplary drawing
 
1. A method for image sharpening, the method comprising:
obtaining, using at least one sensor of an electronic device, an image that includes visual content;
generating an edge map that indicates edges of the visual content within the image;
applying a high-pass signal and an adaptive gain based on the edge map to sharpen the image;
generating a bright halo mask and a dark halo mask based on the edge map, wherein the bright halo mask indicates an upper sharpening limit and the dark halo mask indicates a lower sharpening limit; and
modifying a level of sharpening at one or more of the edges within the sharpened image to provide halo artifact reduction based on the bright halo mask and the dark halo mask.