Continuous focusing method for digital camera
US8284296B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 3, 2010 |
| Grant date | Oct 9, 2012 |
| Priority date | — |
| Expiry date | Mar 15, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/651
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A continuous focusing method for a digital camera is described, which is applicable to determine whether the digital camera performs a focusing procedure or not when the digital camera switches from a first scene to a second scene in a live view stage. The continuous focusing method includes the following steps. A preview image of a second scene is obtained. A blur detection procedure is performed on the preview image, so as to acquire a corresponding focus value. It is determined whether the focus value exceeds a focusing threshold value or not; if not, a focusing procedure is performed; otherwise, if the focus value is greater than the focusing threshold value, the digital camera still maintains a current focusing focal length, which represents that a focusing focal length of the second scene is the same as that of the first scene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.