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:
Mar. 17, 1981
Filed:
Apr. 03, 1979
Rudiger Sommer, Raisdorf, DE;
Hermann Wischer, Kiel, DE;
Dr.-Ing. Rudolf Hell GmbH, Firma, Kiel, DE;
Abstract
A facsimile scanning method for converting a video signal, generated by opto-electronic scanning of an original copy, into a bilevel black/white signal in facsimile reproduction. In the black/white recording of colored originals in which both the background and the information can be white, black, grey or colored, white/grey (colored)/black transitions in the original are frequently not picked up correctly so that information is lost in the copy. The invention solves this problem by recording colored, grey or black areas in the original as 'white' with black boundary lines, by means of suitable electronic circuits. If the colored area in the original is a background area without information content of its own but containing a black item of information (letter), the legibility of the black letter in the area is increased in the copy by reproducing the background area as 'white'. On the other hand, the background area remains recognizable in the copy with respect to the white of the paper by virtue of its surround. If the colored area in the original, however, is itself an item of information, e.g. a broad letter, the line-boundary according to the invention causes at least the contour of the letter to be recorded in the copy, making the letter legible. In general, black areas in the original can be reproduced in the copy as white areas with black surround. This has the advantage that overheating of thermal print of needle print recording devices is avoided due to the reduced black component in the copy.