US 12,149,837 B2
Auto white balance adjusting method and auto white balance adjusting system by using dynamic window allocations
Chien-Ming Chen, Hsinchu (TW); Chun-Ying Li, Hsinchu (TW); Hsuan-Ying Chen, Hsinchu (TW); and Te-Wei Hsu, Hsinchu (TW)
Assigned to WELTREND SEMICONDUCTOR INC., Hsinchu (TW)
Filed by WELTREND SEMICONDUCTOR INC., Hsinchu (TW)
Filed on May 3, 2023, as Appl. No. 18/142,593.
Claims priority of application No. 112101669 (TW), filed on Jan. 16, 2023.
Prior Publication US 2024/0244335 A1, Jul. 18, 2024
Int. Cl. H04N 23/88 (2023.01); G06T 7/90 (2017.01); H04N 9/73 (2023.01)
CPC H04N 23/88 (2023.01) [G06T 7/90 (2017.01); H04N 9/73 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An auto white balance adjusting method comprising:
acquiring an image;
allocating N windows inside the image according to color information of the image;
acquiring feature information of each of the N windows;
filtering out M windows from the N windows for generating N-M windows according to the feature information of the N windows;
grouping color temperatures of the N-M windows for generating at least one color temperature group according to a standard color temperature curve;
setting a first weighting of the at least one color temperature group according to a correlation between the at least one color temperature group and the standard color temperature curve;
setting a second weighting of the at least one color temperature group according to spatial information of the at least one color temperature group of the image; and
adjusting a white balance of the image according to color information of the N-M windows, the first weighting of the at least one color temperature group, and the second weighting of the at least one color temperature group;
wherein N and M are two positive integers, and N is greater than M.