Efficient data storage system for gray-scale printers
US5125072A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 31, 1989 |
| Grant date | Jun 23, 1992 |
| Priority date | — |
| Expiry date | Jul 31, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K2215/0094
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Apparatus and method for producing a page output from electronic input data consisting of text and line graphics information and of pictorial information. The text and graphics information is converted to two-bit per pixel data and stored in a page buffer. The pictorial information is originally stored at its originating pixel resolution and at a bit level sufficient to represent the full color content. This pictorial data is expanded to a finer pixel resolution at a four-bit level, per color, at the time data is to be merged with the text and graphics data. The merging is accomplished in a band or line buffer which combines the two-bit and four-bit data. A location table is used to keep track of the bit level transitions and to signal the output device that the data is in a particular format.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.