Method and apparatus for determining ambient conditions from an image sequence, such as fog, haze or shadows
US6037976A · kind A · utility
41Cited by
21References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 30, 1996 |
| Grant date | Mar 14, 2000 |
| Priority date | — |
| Expiry date | Oct 30, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30232
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for determining certain ambient conditions in a scene by analyzing a sequence of images that represent the scene. The apparatus uses only image information to determine scene illumination, or the presence of shadows, fog, smoke, or haze by comparing properties of detected objects, averaged over a finite video sequence, against properties of the reference image of the scene as that scene would appear without any objects present. Such a reference image is constructed in a manner similar to time-averaging successive camera images.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.