Method and device for estimating noise level of dark reference rows of an image sensor
US11128824B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 11, 2019 |
| Grant date | Sep 21, 2021 |
| Priority date | — |
| Expiry date | Mar 25, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/633
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system has an array of pixels including a plurality of active pixels and a plurality of dark reference pixels and processing circuitry coupled to the array of pixels. The processing circuitry sequentially computes, for each of a plurality of pairs of sets of dark reference pixels of the plurality of dark reference pixels, absolute differences in dark signal levels of the pair of sets of dark reference pixels. The absolute differences in dark signal levels are accumulated and a noise level of the dark reference pixels of the array of pixels is estimated based on the accumulated absolute differences. The system may be employed in, for example, a back-up camera of an automobile or a mobile phone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.