Automatic focusing control of a video camera for industrial and military purposes
US5016110A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 17, 1989 |
| Grant date | May 14, 1991 |
| Priority date | — |
| Expiry date | Jul 17, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/695
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A video camera is used for controlling the adjustment of a manipulator unit. An object is imaged by the video camera which is optimumly focused with respect to the object as a function of the mean brightness of a predetermined image from containing the image of the object. The focusing operation is carried out on the basis of obtaining an optimum value for the mean brightness of the image elements within the predetermined image frame enclosing the object image. The manipulator unit may contain an industrial robot for selectively adjusting either one of a workpiece or a tool acting upon a workpiece. Furthermore, the manipulator unit may contain a target tracking platform for tracking a target constituting the object imaged by the video camera.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.