Brightness-variation compensation method and coding/decoding apparatus for moving pictures
US6266370A · kind A · utility
143Cited by
3References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 29, 1997 |
| Grant date | Jul 24, 2001 |
| Priority date | — |
| Expiry date | Aug 29, 2017 |
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 D.sub.C.multidot.x+D.sub.B, wherein D.sub.B is a parameter indicating a gain change and D.sub.C 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.