Dual spectral band network camera
US7492390B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 14, 2004 |
| Grant date | Feb 17, 2009 |
| Priority date | — |
| Expiry date | Jul 19, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/84
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The subject of this invention is the network camera sensitive to both visual and near-infrared or infrared spectral bands and comprising two or more image sensors with different spectral responses, one or more image processors, and network interfaces. In the preferred embodiment the network camera disclosed in this invention comprises two image sensors with individual optics, where both sensors have similar fields of view. In the preferred embodiment of the present invention one of the sensors is color image sensor with infrared-cut filter positioned in front of pixel array, while the other sensor is monochrome image sensor with optics characterized by lower f-number than that used for color sensor and without infrared-cut filter in its field of view. In one of the embodiments of this invention, monochrome sensor has larger pixel sizes than color sensor to provide for higher low-light sensitivity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.