Brightness-variation compensation method and coding/decoding apparatus for moving pictures
US6934331B2 · kind B2 · utility
135Cited by
2References
12Claims
0Family size
Assignee
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Key dates
| Filing date | Aug 5, 2002 |
| Grant date | Aug 23, 2005 |
| Priority date | — |
| Expiry date | Oct 20, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/61
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A moving image brightness variation compensation method for encoding digital moving images for transmission and storage, and for image processing when editing moving images, the moving image brightness variation compensation method comprising a step of compensating for overall brightness variations by correcting a luminance value x of each pixel according to the formula DC·x+DB, wherein DB is a parameter indicating a gain change and DC is a parameter indicating a contrast change, the parameters representing overall luminance changes between a reference image plane and an image plane being processed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.