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. 21, 1983
Filed:
Feb. 02, 1981
Edward G Bowen, Laurence Harbor, NJ (US);
Arun N Netravali, Westfield, NJ (US);
Bell Telephone Laboratories, Incorporated, Murray Hill, NJ (US);
Abstract
A pseudo-gray scale signal obtained by comparing the intensity values of elements of a picture with a series of spatially dependent threshold values is processed for display on a multilevel device. Generally, an estimate of the intensity value of each pel is formed as a joint function of the display words which make up the pseudo-gray scale signal and an indication of the threshold value associated with the pel. In one embodiment, the display words and threshold values are used to select appropriate stored intensity values obtained from representative pictures. Alternatively, the estimates are derived recursively using display words and threshold values for a neighborhood near the pel being processed.