Apparatus and method for interpreting image data for use in a raster plotter
US5075779A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 27, 1990 |
| Grant date | Dec 24, 1991 |
| Priority date | — |
| Expiry date | Apr 27, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K2215/0094
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system for efficiently generating on a raster line plotter an image that is made up of a plurality of characters, or other objects, based on an opaque ink model. Information relating to the characters is run length encoded, so as to form tone run records corresponding to the raster lines. The tone run records contain information relating to tone value, starting location, length and screen selection. The information is then processed so as to delete, or overwrite, tone value and screen selection information of the portions of characters that underlie other characters. After the appropriate information has been deleted, the remaining screen selection and tone value information is used to create a halftone image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.