US 11,741,576 B2
Image system including image signal processor and operation method of image signal processor
Hyuncheol Kim, Daegu (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Mar. 19, 2021, as Appl. No. 17/207,319.
Claims priority of application No. 10-2020-0038285 (KR), filed on Mar. 30, 2020.
Prior Publication US 2021/0304366 A1, Sep. 30, 2021
Int. Cl. G06T 5/00 (2006.01); H04N 1/58 (2006.01); H04N 9/79 (2006.01); H04N 9/64 (2023.01)
CPC G06T 5/002 (2013.01) [H04N 1/58 (2013.01); H04N 9/646 (2013.01); H04N 9/7908 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An operation method of an image signal processor (ISP) configured to perform signal processing on a raw image received from an image device, the operation method comprising:
generating a plurality of multi-scale images based on an input image, the plurality of multi-scale images having resolutions that are different from each other;
iteratively performing a fast global weighted least squares (FGWLS) based operation on each of the plurality of multi-scale images to generate a final illuminance map; and
outputting an enhanced image based on the final illuminance map and the input image.