Character-based monochromatic representation of color images
US4703318A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 16, 1985 |
| Grant date | Oct 27, 1987 |
| Priority date | — |
| Expiry date | Apr 16, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G3/2051
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Forming a character-based monochromatic image from a digital representation of a color image by (1) forming a character-based representation of the color image in which a plurality of color characters each describe the background and foreground color within a defined area of the color image, (2) providing a plurality of color pattern masks each corresponding to a color in the color image and comprised of a pattern of light and dark dots capable of providing, in the monochromatic image, visual discrimination between areas of different color, (3) transforming the color characters to monochromatic characters by replacing the background and foreground color of each color character with the corresponding pattern of light and dark dots, and (4) displaying the monochromatic characters on a character-based output device (e.g., a CRT display driven by a character-based controller).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.