Video camera with improved zoom capability
US5684532A · kind A · utility
9Cited by
3References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 6, 1995 |
| Grant date | Nov 4, 1997 |
| Priority date | — |
| Expiry date | Oct 6, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/695
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A video camera is operated to obtain a very rapid change in magnification. A target degree of magnification is achieved by rapid change in an electronic zoom factor provided by an image signal processing circuit. Either before or after the change in electronic zoom factor, simultaneous off-setting changes are carried out in the electronic zoom factor and in a mechanical zoom factor provided by the camera's optical system. The simultaneous off-setting changes in the two zoom factors occur at a rate consistent with practical operation of the mechanical drive components for the camera's optical system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.