US 11,989,913 B2
Dynamic calibration correction in multi-frame, multi-exposure capture
Nguyen Thang Long Le, Richardson, TX (US); John William Glotzbach, Allen, TX (US); and Hamid Rahim Sheikh, Allen, TX (US)
Assigned to Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Jan. 11, 2022, as Appl. No. 17/573,031.
Claims priority of provisional application 63/136,840, filed on Jan. 13, 2021.
Prior Publication US 2022/0222854 A1, Jul. 14, 2022
Int. Cl. G06T 7/80 (2017.01); G06T 5/50 (2006.01); G06T 7/90 (2017.01); H04N 9/77 (2006.01); H04N 23/76 (2023.01)
CPC G06T 7/80 (2017.01) [G06T 5/50 (2013.01); G06T 7/90 (2017.01); H04N 9/77 (2013.01); H04N 23/76 (2023.01); G06T 2207/10024 (2013.01); G06T 2207/10144 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for dynamic calibration correction, the method comprising:
receiving an amplified non-reference frame to which a digital gain was applied and a reference frame;
generating a mask based on the reference frame and the amplified non-reference frame;
estimating a scaling coefficient and an offset coefficient for each of a number of channels in the amplified non-reference frame based on a selected pixel location in the generated mask;
correcting a calibration of the amplified non-reference frame by applying the scaling and offset coefficients for each of the channels; and
outputting a calibration-corrected amplified non-reference frame to a multi-frame processor.