Adaptive infrared illumination for exposure correction
US10609298B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 6, 2018 |
| Grant date | Mar 31, 2020 |
| Priority date | — |
| Expiry date | Feb 6, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/61
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system and method that provides adaptive IR illumination for a camera. In some implementations, IR illumination adapts to the objects in a scene being monitored and IR illumination adaptation may be implemented in conjunction with automatic exposure and other exposure adjustment methods. Some implementations include: illuminating a scene using a first IR illumination power; capturing a first image of the scene with a camera; and determining whether a first region of the first image is underexposed or overexposed. When the first region is underexposed, the scene is illuminated at a second power level greater than the first illumination power and a second image is captured. When the first region is overexposed, the scene is illuminated at a third power level that is less than the first illumination power and a third image is captured. The operations are repeated until scene illumination is satisfactory.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.