US 12,217,433 B2
Adaptive auto white balancing
Yang-Ting Chou, Zhubei (TW); and Zhaojian Li, Fremont, CA (US)
Assigned to Cista System Corp., Grand Cayman (KY)
Filed by CISTA SYSTEM CORP., Grand Cayman (KY)
Filed on Sep. 8, 2022, as Appl. No. 17/940,891.
Prior Publication US 2024/0087128 A1, Mar. 14, 2024
Int. Cl. G06T 7/11 (2017.01); G06T 3/4015 (2024.01); G06T 5/20 (2006.01); G06T 7/90 (2017.01)
CPC G06T 7/11 (2017.01) [G06T 3/4015 (2013.01); G06T 5/20 (2013.01); G06T 7/90 (2017.01)] 20 Claims
OG exemplary drawing
 
1. An image sensor apparatus, comprising:
a memory configured to store eigen-illuminant images;
an image sensing module configured to capture an image; and
an image signal processor configured to:
generate a plurality of chrominance channels by converting the image into luminance-chrominance space;
perform homogeneous region segmentation on the plurality of chrominance channels to generate one or more regions of interest in the plurality of chrominance channels;
receive the eigen-illuminant images from the memory, and
project the regions of interest onto eigen-illuminant images to determine gray color pixels on the image, wherein the eigen-illuminant images are generated via performing a machine learning algorithm on a training set of images captured by the image sensor.