Method and system for compensating image having fixed pattern noise
US11875481B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 11, 2021 |
| Grant date | Jan 16, 2024 |
| Priority date | — |
| Expiry date | Mar 5, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/20216
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and a system for compensating an image having fixed pattern noise are provided. The method is adapted to a 4-cell sensor and can automatically calculate appropriate compensation parameters for fixed pattern noise according to non-uniformity of the sensor and lens. Since the defects in the sensor or the lens may cause non-uniform fixed pattern noise, an image is firstly divided into multiple grids and a pixel average of every channel in the grids is calculated. Afterwards, a fixed pattern noise compensation coefficient of every pixel can be calculated according to characteristics of the image formed by the 4-cell sensor. In one aspect, the compensation coefficient of the current pixel can be calculated by extrapolation or interpolation. The fixed pattern noise in the image can be corrected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.