Optical distortion correction in digital video processing applications
US8396322B1 · kind B1 · utility
5Cited by
3References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 11, 2008 |
| Grant date | Mar 12, 2013 |
| Priority date | — |
| Expiry date | Dec 11, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3173
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Methods for reducing optical distortion such as keystone distortion can include receiving an input image and modifying the input image by applying two separate 1D operations to the input image and applying a polyphase filter to the input image, where the first 1D operation is performed after application of the second 1D operation has begun. The modified image can then be projected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.