Method and system for detection of binary halftone frequencies

Details Method and system for detection of binary halftone frequencies Method and system for detection of binary halftone frequencies

2011-06-21

2011-06-21

Tran, Douglas Q (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S003060

Reexamination Certificate

active

07965413

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.

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