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, 2011
Filed:
Mar. 29, 2007
Applicant:
David Jordan Lieberman, Fairport, NY (US);
Inventor:
David Jordan Lieberman, Fairport, NY (US);
Assignee:
Xerox Corporation, Norwalk, CT (US);
Primary Examiner:
Int. Cl.
CPC ...
G06F 15/00 (2006.01); G06K 1/00 (2006.01); H04N 1/60 (2006.01); H04N 1/405 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method and system detects a halftone frequency. A digitized image is received. An autocorrelation function is performed upon the digitized image to generate an autocorrelation function value for each halftone frequency of a predetermined set of possible halftone frequencies. A demerit term for each possible halftone frequency, based upon the autocorrelation function value, is calculated. A halftone frequency from a predetermined set of possible halftone frequencies, based upon the calculated demerit terms, is selected.