Image pickup apparatus having a common circuit portion for autofocusing and outline emphazising circuits
US6798455B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 14, 2000 |
| Grant date | Sep 28, 2004 |
| Priority date | — |
| Expiry date | Jul 14, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/208
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A luminance signal is extracted from an image pickup signal photographed by a solid state image pickup device and at least a high frequency component in the extracted luminance signal is extracted by a filter. A gain of at least the high frequency component in the luminance signal extracted by a filter is varied. The luminance signal from a luminance signal extracting unit and at least the high frequency component in the luminance signal in which the gain has been varied by a gain control unit are added, thereby emphasizing an edge portion. A focusing lens is driven on the basis of the level of at least the high frequency component in the luminance signal extracted by the filter, thereby controlling an in-focus point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.