Display management for high dynamic range video
US9961237B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 14, 2016 |
| Grant date | May 1, 2018 |
| Priority date | — |
| Expiry date | Jan 14, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2370/04
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A display management processor receives an input image with enhanced dynamic range to be displayed on a target display which has a different dynamic range than a reference display. The input image is first transformed into a perceptually-quantized (PQ) color space, preferably the IPT-PQ color space. A color volume mapping function, which includes an adaptive tone-mapping function and an adaptive gamut mapping function, generates a mapped image. A detail-preservation step is applied to the intensity component of the mapped image to generate a final mapped image with a filtered tone-mapped intensity image. The final mapped image is then translated back to the display's preferred color space. Examples of the adaptive tone mapping and gamut mapping functions are provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.