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:
Jun. 01, 1976
Filed:
May. 09, 1975
John Frederick Jarvis, Fair Haven, NJ (US);
Bell Telephone Laboratories, Incorporated, Murray Hill, NJ (US);
Abstract
Continuous tone images are displayed on a bi-level display device by establishing thresholds for each display element and actuating a particular element when its intensity .phi. bears a predetermine relationship to the established threshold. Thresholds .phi..sub.T are established by determining the average intensity .phi. of picture elements in the neighborhood of a particular display element, and by constraining the average to a narrower range according to a single value function of .phi. such as ##EQU1## WHERE .phi..sub.MAX IS THE MAXIMUM INTENSITY POSSIBLE AND .gamma. IS A CONSTANT WHICH CAN BE DETERMINED SUBJECTIVELY OR WHICH CAN BE RELATED TO THE NOISE IN THE PICTURE AREA.