US 11,736,804 B2
Method and apparatus for generating high dynamic range frame through white balance compensation that uses white balance gain table generated from combining multiple sets of white balance gain settings
Jen-Hung Yu, Hsinchu (TW); Ming-Chang Chuang, Hsinchu (TW); and Po-Yu Yeh, Hsinchu (TW)
Assigned to MEDIATEK INC., Hsin-Chu (TW)
Filed by MEDIATEK INC., Hsin-Chu (TW)
Filed on Jul. 20, 2021, as Appl. No. 17/381,165.
Claims priority of provisional application 63/075,243, filed on Sep. 7, 2020.
Prior Publication US 2022/0078324 A1, Mar. 10, 2022
Int. Cl. H04N 23/72 (2023.01); H04N 9/77 (2006.01); G06F 18/25 (2023.01); H04N 23/71 (2023.01)
CPC H04N 23/72 (2023.01) [G06F 18/251 (2023.01); H04N 9/77 (2013.01); H04N 23/71 (2023.01)] 8 Claims
OG exemplary drawing
 
1. An image processing method comprising:
generating a plurality of exposure frames with different exposures from splitting a single high dynamic range (HDR) frame;
analyzing, by a white balance gain estimation circuit, the plurality of exposure frames with the different exposures to generate a plurality of sets of white balance gain settings;
combining the plurality of sets of white balance gain settings to generate a white balance gain table; and
applying the white balance gain table to an HDR frame to generate a white balance compensated HDR frame, wherein the single HDR frame directly acts as the HDR frame to which the white balance gain table is applied, or the HDR frame to which the white balance gain table is applied is obtained from applying image processing to the single HDR frame.