Patent ID: 11949996
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 0:
1. A device for estimating a scene illumination color for a source image, the device comprising a processor and a non-transitory memory having processor-executable instructions stored thereon, wherein the processor is configured to execute the processor-executable instructions to cause the device to perform the following operations:
determining a set of candidate illuminants;
for each candidate illuminant of the set of candidate illuminants, determining a respective correction for the source image;
for each candidate illuminant of the set of candidate illuminants, applying the respective correction to the source image to form a corresponding set of corrected images;
for each corrected image from a respective set of corrected images, estimating a respective probability of achromaticity of the respective corrected image using a trained data-driven model;
based on estimated probabilities of achromaticity for each set of corrected images, obtaining a final estimate of the scene illumination color for the source image; and
performing a correction on the source image using the obtained final estimate to transform the source image to a target image.