Method for inverse tone mapping of a sequence of images
US10013745B2 · kind B2 · utility
1Cited by
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18Claims
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Key dates
| Filing date | Aug 24, 2016 |
| Grant date | Jul 3, 2018 |
| Priority date | — |
| Expiry date | Aug 24, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/615
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method is described for inverse tone mapping the luminance (Yt(p)) of each pixel (p) of at least one image (It) of this sequence into an expanded luminance Ytexp(p)=Yt(p)Et(p). Ytenh(p), wherein Et(p) is an expansion exponent value extracted from an expansion exponent map built from low pass motion-compensated temporal filtering of said image (It) and wherein Ytenh(p) is a luminance-enhancement value extracted from a luminance-enhancement map built from high pass motion-compensated temporal filtering of said image (It).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.