System and method for estimating an ambient light condition using an image sensor and field-of-view compensation
US9277144B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2014 |
| Grant date | Mar 1, 2016 |
| Priority date | — |
| Expiry date | Mar 20, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/71
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system and method for estimating an ambient light condition is using an image sensor of a digital camera. An array of pixels is obtained using the image sensor. A matrix of grid elements is defined. Each grid element comprises multiple adjacent pixels of the array of pixels. A first measurement value is generated for a grid element of the matrix of grid elements based on the pixels associated with the grid element. A set of grid elements are identified having a first measurement value that satisfies a brightness criteria. A second measurement is generated using the identified set of grid elements. A simulated-light-sensor array is generated using the second measurement value. An estimate of the ambient light condition is calculated using the simulated-light-sensor array.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.