Automatic keystone correction for projectors with arbitrary orientation
US6520647B2 · kind B2 · utility
99Cited by
5References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 15, 2001 |
| Grant date | Feb 18, 2003 |
| Priority date | — |
| Expiry date | Aug 15, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3194
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method corrects keystoning in a projector arbitrarily oriented with respect to a display surface. An elevation angle, a roll angle, and an azimuth angle of an optical axis of the projector are measured with respect to the display surface. A planar projective transformation matrix is determined from the elevation, roll, and azimuth angles. A source image to be projected by the projector is warped according to the planar projective transformation, and then projected onto the display surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.