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:
Feb. 16, 1993
Filed:
Feb. 09, 1990
Graphic Edge, Inc., Amherst, NH (US);
Abstract
A technique for creating and applying half tone screen patterns by computer, consisting of a screen generator and a screen applicator. The screen generator accepts a set of parameters specifying the angle and frequency of the desired screen, the output printing device resolution, and parameter tolerances. It then produces a half tone screen pattern file according to the specified parameters, as a set of repeat arrays for each desired gray level. The screen applicator accepts an input contone image representation such as is produced by a scanner or other device, and the half tone screen pattern file produced by the screen generator. It then interpolates between the pixel values, at the output device resolution, by examining the repeat arrays for each device cell. In this way, a representation of a half tone screening of the input contone image results where the output device resolution is fully exploited.