Method and device for encoding a high-dynamic range image and/or decoding a bitstream
US9924178B2 · kind B2 · utility
0Cited by
1References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 22, 2014 |
| Grant date | Mar 20, 2018 |
| Priority date | — |
| Expiry date | Dec 22, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2360/16
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention generally relates to a method and device for encoding an image. The method comprises: —encoding (12) a backlight image determined (11) from the image; —obtaining (13) a residual image by dividing the image by a decoded version of the backlight image, —obtaining (16) a tone-mapped residual image by tone-mapping the residual image; and —encoding (19) the tone-mapped residual image. The invention relates also to a method and device for decoding a bitstream representing a residual image calculated by dividing an image by a backlight image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.