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. 07, 1984
Filed:
Sep. 21, 1981
Applicant:
Inventors:
Richard H Tuhro, Webster, NY (US);
Douglas G Wiggins, Penfield, NY (US);
Assignee:
Xerox Corporation, Stamford, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G09G / ;
U.S. Cl.
CPC ...
382 50 ; 340728 ; 340747 ; 340793 ; 340801 ;
Abstract
An image thresholding system employing a ROM look up table to make threshold decisions. A plurality of shift registers are used to convert a digital pixel input which includes the pixel to be processed to an address for use in addressing the ROM look up table to provide a thresholded value for the pixel being processed. The output of the ROM look up table is utilized, together with other pixels from the pixel input, to address a second ROM look up table to provide a further refined threshold decision.