The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 24, 1991
Filed:
Apr. 27, 1990
J Brett Lefebvre, Lowell, MA (US);
Glenn E Cabana, Derry, NH (US);
Intergraph Corporation, Huntsville, AL (US);
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.