Automatic white balance correction for digital images using multi-hypothesis classification
US11949996B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 12, 2022 |
| Grant date | Apr 2, 2024 |
| Priority date | — |
| Expiry date | Aug 21, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/646
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A device for estimating a scene illumination color for a source image is configured to: determine a set of candidate illuminants and for each of the candidate illuminants, determine a respective correction of the source image; for each of the candidate illuminants, apply the respective correction to the source image to form a corresponding set of corrected images; for each corrected image from the set of corrected images, implement a trained data-driven model to estimate a respective probability of achromaticity of the respective corrected image; and based on the estimated probabilities of achromaticity for the set of corrected images, obtain a final estimate of the scene illumination color for the source image. This approach allows for the evaluation of multiple candidate illuminates to determine an estimate of the scene illumination color.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.