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:
Aug. 23, 1983
Filed:
Oct. 30, 1981
Ronald S Tomory, Webster, NY (US);
James M Odorczyk, Webster, NY (US);
Xerox Corporation, Stamford, CT (US);
Abstract
A two stage image processing apparatus and method wherein, in a first stage, successive groups of image pixels are used to address a RAM based look up table to provide a preliminary breakdown between halftone and textural images. As a second stage, to further enhance the differentiation between halftone and textural images, the output of the RAM address table is employed to generate a count signal. Previous counts stored in a succession of counters are used to determine a new count, a predetermined number of which are summed as a block by an adder in response to the count signal. The is compared with a preset threshold to generate a control signal for operating a pixel generator. The new counts are used to update the counters, the count on the counter serving to represent prior pixel processing conditions.