Method and apparatus for correcting pixel level intensity variation
US6954193B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 2000 |
| Grant date | Oct 11, 2005 |
| Priority date | — |
| Expiry date | Sep 26, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/0673
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus is described for providing a consistent visual appearance of pixels of a display screen with respect to a viewing position. Variations between perceived pixel level values associated with the pixels and corresponding pixel level values may be compensated for. Variations are associated with a viewing angle between pixel location and the viewing position and compensated for by applying a respective different correction factor to each of the corresponding pixel level values based on a respective viewing angle. Accordingly different non-linear correction curves corresponding to locations may be established relating a range of pixel level values to a corresponding range of corrected pixel level values associated with the viewing position. A calibration pattern may be further be displayed and user inputs associated with locations received responsive to calibration pattern. Viewing position and non-linear correction curves may thereby be established for locations relative to the viewing position and based on user inputs. User inputs are stored with an association to a user identity. A user input is processed to obtain user identity and stored user inputs and viewing…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.