Communications: electrical – Digital comparator systems
Patent
1976-07-30
1977-08-09
Boudreau, Leo H.
Communications: electrical
Digital comparator systems
209DIG2, 235 6111K, 3401463Q, G06K 900
Patent
active
040414566
ABSTRACT:
A bill to be verified is scanned lengthwise by a two track optical sensor. For each bill the resulting analog signals are divided into eight segments or windows each segment producing a binary coded pattern produced by delta modulation. This is compared to a stored reference and a number is produced representing the dissimilarity between the bill being scanned and the average bill of that denomination with which it is being compared. Thereafter, a processor compares the foregoing numbers with additional quantitative functions which have previously been stored relating the corresponding segments of the bill denomination being scanned to other bill denominations. With the use of limit and weighting functions they are summed over the eight different effective windows and a decision is made as to whether the proper denomination is present.
REFERENCES:
patent: 2731621 (1956-01-01), Sontheimer
patent: 2922893 (1960-01-01), Ett
patent: 2941187 (1960-06-01), Simjian
patent: 3031076 (1962-04-01), De Claris et al.
patent: 3576534 (1971-04-01), Steinberger
patent: 3725667 (1973-04-01), Schwartz
patent: 3782543 (1974-01-01), Martelli et al.
patent: 3930582 (1976-01-01), Gartner et al.
Ott Cynthia Bunce
Ott David M.
Stoides John G.
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