Transformation of dynamic metadata to support alternate tone rendering
US9916638B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 2, 2017 |
| Grant date | Mar 13, 2018 |
| Priority date | — |
| Expiry date | May 2, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/32101
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An existing metadata set that is specific to a color volume transformation model is transformed to a metadata set that is specific to a distinctly different color volume transformation model. For example, source content metadata for a first color volume transformation model is received. This source metadata determines a specific color volume transformation, such as a sigmoidal tone map curve. The specific color volume transformation is mapped to a color volume transformation of a second color volume transformation model, e.g., a Bézier tone map curve. Mapping can be a best fit curve, or a reasonable approximation. Mapping results in metadata values used for the second color volume transformation model (e.g., one or more Bézier curve knee points and anchors). Thus, devices configured for the second color volume transformation model can reasonably render source content according to received source content metadata of the first color volume transformation model.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.