Temporally coherent local tone mapping of HDR video
US9361679B2 · kind B2 · utility
2Cited by
3References
17Claims
0Family size
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Key dates
| Filing date | Jul 28, 2014 |
| Grant date | Jun 7, 2016 |
| Priority date | — |
| Expiry date | Jul 28, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/20208
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Approaches are described for filtering a first image frame in a sequence of image frames. A tone-mapping pipeline applies a spatiotemporal filter to each pixel of the first image frame, based on a forward optical flow and a backward optical flow, to produce a base layer image. The tone-mapping pipeline applies a temporal filter to each pixel of the first image frame, based on the forward optical flow and the backward optical flow, to produce a temporally filtered frame. The tone-mapping pipeline produces a detail layer image based on the base layer image and the temporally filtered frame.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.