Method and system for reducing column noise of image sensor
US11785358B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 26, 2022 |
| Grant date | Oct 10, 2023 |
| Priority date | — |
| Expiry date | Aug 26, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/772
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and a system for reducing column noise of an image sensor are provided. The method includes: reading dark pixel data in each image frame and reading initial effective pixel data in each image frame, where dark pixels and initial effective pixels are both arranged in N columns; sequentially calculating the dark pixel data to obtain an average value of each column of dark pixels and an entire average value of the dark pixels in each image frame; obtaining a corrected value of each column according to the average value of each column of dark pixels and the entire average value of the dark pixels; and calculating the corrected value of each column and the corresponding initial effective pixel data in each image frame to obtain target effective pixel data. In the method, the dark pixel data is pre-processed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.