Method and apparatus for calibrating a computer-generated projected image
US6292171A · kind A · utility
89Cited by
23References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 31, 1999 |
| Grant date | Sep 18, 2001 |
| Priority date | — |
| Expiry date | Mar 31, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3185
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus and method for calibrating a computer-generated projected image to the displayed image viewed on the computer screen. Four or more calibration spots, at least three of which are collinear, arrayed in a predetermined pattern in both the displayed and the projected images, are optically imaged and electronically discriminated in the projected image, their coordinates ascertained and related to the predetermined pattern so as to derive transformation coefficients used in the process of converting a location on the projected image to the corresponding location in the displayed image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.