Imaging device, integrated circuit, and imaging method for encoding image frames based on detected flicker of a light source
US8144213B2 · kind B2 · utility
2Cited by
3References
6Claims
0Family size
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Key dates
| Filing date | Oct 23, 2008 |
| Grant date | Mar 27, 2012 |
| Priority date | — |
| Expiry date | Sep 9, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/85
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A frame brightness detecting unit 15 detects a frame brightness value of each of a plurality of image frames. A flicker spectrum detecting unit 16 detects, from the frame brightness values of 512 frames, spectrum values at frequencies, such as 100 Hz, 200 Hz, and 300 Hz. A brightness estimating unit 17 estimates a brightens value of a light source from the spectrum values. An encoding unit 18 uses a reciprocal of the estimated brightens value to determine a reference frame. The encoding unit 18 also uses the reciprocal in an evaluation function for motion vector estimation. The image frame is encoded using the motion vector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.