Data processing method and apparatus for converting color image data to non-linear palette
US5412766A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 21, 1992 |
| Grant date | May 2, 1995 |
| Priority date | — |
| Expiry date | Oct 21, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G5/02
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A personal computer system has source of input video data containing digitized pixel color values, and a display operated with palette quantized colors including non-linear palette quantized colors. A conversion table is stored in the system for converting blocks of pixel color values into palette colors, the conversion table comprising a plurality of error diffusion arrays covering the color range of pixel color values. Each array in the conversion table corresponds to a different color value, each array being accessed using said corresponding color value as an index into said table. Each array in the table has "n" fields respectively containing palette color values ordered in accordance with an order matrix by sorted luminance values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.