Method, system and computer program for compressing and transmitting image raster data
US7564586B1 · kind B1 · utility
0Cited by
13References
50Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 28, 2000 |
| Grant date | Jul 21, 2009 |
| Priority date | — |
| Expiry date | Sep 20, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/4105
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and system for printing of gray scale images utilizes raster image data. A page is divided into tiles in a two dimensional grid. Tiles are checked for the presence of dither cells for generating gray scale values. Tiles without dither cells are compressed for transmission while tiles having dither cells are not compressed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.