Real-time face tracking in a digital image acquisition device
US7460695B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 21, 2007 |
| Grant date | Dec 2, 2008 |
| Priority date | — |
| Expiry date | Aug 7, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/3205
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image processing apparatus for tracking faces in an image stream iteratively receives an acquired image from the image stream potentially including one or more face regions. The acquired image is sub-sampled at a specified resolution to provide a sub-sampled image. An integral image is then calculated for a least a portion of the sub-sampled image. Fixed size face detection is applied to at least a portion of the integral image to provide a set of candidate face regions. Responsive to the set of candidate face regions produced and any previously detected candidate face regions, the resolution is adjusted for sub-sampling a subsequent acquired image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.