Methods and apparatus for detecting and reducing color errors in images
US6396505B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 29, 1999 |
| Grant date | May 28, 2002 |
| Priority date | — |
| Expiry date | Apr 29, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2340/0457
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Display apparatus, and methods for displaying images, e.g., text, on gray scale and color monitors where each pixel includes multiple pixel sub-components are described. Filtering and/or displaced sampling is used to generate pixel sub-component luminous intensity values. As a result of treating pixel sub-components as distinct light emitters corresponding to different image portions, resolution is enhanced but color errors may be introduced into the image being displayed. Various techniques for detecting noticeable and/or distracting color errors are described. In addition, various techniques for correcting, compensating for, or reducing color errors are described. In one particular embodiment, red, green and blue pixel sub-component luminous intensity values are examined and compared to a range of luminous intensity values which is determined as a function of utilized foreground and background pixel colors. Pixel sub-component luminous intensity values which are determined to be outside the range of acceptable values are adjusted to fall within the range of acceptable values. In one particular embodiment, individual pixel sub-component luminous intensity values outside the range …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.