System and method for projector alignment using detected image features
US11303864B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 9, 2020 |
| Grant date | Apr 12, 2022 |
| Priority date | — |
| Expiry date | Sep 9, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3194
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus are provided for calibrating projector alignment using detected image features projected onto a surface, the apparatus comprising a first processor detects features in a single frame of video and a second processor detects features in the corresponding projected image detected by a camera. The second processor matches features of interest in the selected video frame and captured image to correct the projector alignment. The images may be compared using blob detection or corner detection. Unlike prior art ‘off-line’ calibration methods, video frames can be processed continuously (e.g. every frame) or intermittently (e.g. every 10th frame) without interrupting the display of video content.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.