Median-based dark level acquisition for a frame rate clamp
US6909460B2 · kind B2 · utility
1Cited by
11References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 25, 2001 |
| Grant date | Jun 21, 2005 |
| Priority date | — |
| Expiry date | Jan 8, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/633
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A circuit for determining the median dark level of an image sensor, the circuit comprises a first circuit for comparing a current pixel value and a cumulative median; a storage element for storing the cumulative median level; and a second circuit which utilizes the first circuit for adjusting the cumulative median based on the current pixel level input for updating the cumulative median dark level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.