Inverse luma/chroma mappings with histogram transfer and approximation
US10264287B2 · kind B2 · utility
15Cited by
2References
20Claims
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Key dates
| Filing date | Oct 4, 2017 |
| Grant date | Apr 16, 2019 |
| Priority date | — |
| Expiry date | Oct 12, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/40
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An SDR CDF is constructed based on an SDR histogram generated from a distribution of SDR codewords in SDR images. An HDR CDF is constructed based on an HDR histogram generated from a distribution of HDR codewords in HDR images that correspond to the SDR images. A histogram transfer function is generated based on the SDR CDF and the HDR CDF. The SDR images are transmitted along with backward reshaping metadata to recipient devices. The backward reshaping metadata is generated at least in part on the histogram transfer function.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.