US 12,094,086 B2
System and method for multi-exposure, multi-frame blending of red-green-blue-white (RGBW) images
Long N. Le, Richardson, TX (US); Hamid R. Sheikh, Allen, TX (US); and John W. Glotzbach, Allen, TX (US)
Assigned to Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Jan. 28, 2022, as Appl. No. 17/587,309.
Claims priority of provisional application 63/222,053, filed on Jul. 15, 2021.
Prior Publication US 2023/0021726 A1, Jan. 26, 2023
Int. Cl. G06T 5/50 (2006.01); G06T 5/73 (2024.01)
CPC G06T 5/50 (2013.01) [G06T 5/73 (2024.01); G06T 2207/10024 (2013.01); G06T 2207/20221 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
obtaining multiple images of a scene using at least one red-green-blue-white (RGBW) image sensor;
generating multi-channel frames at different exposure levels from the images;
estimating motion across exposure differences between the different exposure levels using a white channel of the multi-channel frames as a guidance signal to generate multiple motion maps;
estimating saturation across the exposure differences between the different exposure levels to generate multiple saturation maps;
using the generated motion maps and saturation maps to recover saturations from the different exposure levels and generate a saturation-free RGBW frame; and
processing the saturation-free RGBW frame to generate a final image of the scene.