Method and apparatus for colour correction during HDR to SDR conversion
US11423522B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 18, 2018 |
| Grant date | Aug 23, 2022 |
| Priority date | — |
| Expiry date | Nov 3, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2340/06
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present embodiments relate to a method and apparatus comprising: —deriving chroma components (I) of a third image by correcting chroma components (II) of a second image according to a luma component of said second image and a reconstructed component obtained by applying a mapping function to said luma component (III) of said second image, said chroma components (II) of the second image being obtained by applying a conversion matrix to components (IV) of a first image; and —adapting coefficients of the conversion matrix which are relative to a chroma component of said third image independently of coefficients of the conversion matrix which are relative to another chroma component of said third image to ensure that there is no clipping on chroma components of the third image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.