Vertical compensation in a moving camera
US6781623B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 13, 2000 |
| Grant date | Aug 24, 2004 |
| Priority date | — |
| Expiry date | Oct 28, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2007/145
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A hand-held device comprising a housing (10) shaped and dimensioned to allow the device to be hand held, a display (12) secured to the housing for displaying moving pictures on a frame-by-frame basis, and a camera (16, 18) having an optical axis (O) extending generally away from the display to image a person who is viewing the display. The hand-held device further comprises a sensor (20) configured to determine a rotational angle between an alignment axis (V) of the hand-held device and a reference alignment axis in real space. Alternative embodiments use a reference alignment axis obtained on the basis of data content of the images, as determined by image processing techniques. In this way, subjective picture quality can be improved by compensating for vertical mis-alignment of the image content of the frames obtained by the camera.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.