US 4,464,786 AGranted

System for identifying currency note

AssigneeTokyo Shibaura Denki Kabushiki Kaisha

InventorsAkihiro Nishito, Ko Ohtombe, Susumu Yamakawa, Yasushi Nakamura

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Abstract

A currency note identification system comprises a line sensor generating a scanning signal corresponding to the printed pattern on a currency note, an adder for summing picture element signals in the scanning signal from the line sensor for each scanning line, and a detecting circuit for detecting the leading and trailing edges of a printed section of the currency note from the sum signal output of the adder. Printed pattern data for printed patterns at predetermined positions with respect to the leading and trailing edges detected by the detecting circuit are detected, and the similarity of the detected pattern data to standard pattern data is calculated by a calculator. The kind and/or genuineness of the currency note is determined from the similarity obtained from the calculator.

Claims17

Dependent claims

A printed matter identification system comprising:

means for scanning a printed pattern of said printed matter and generating a plurality of scanning signals indicative thereof;
means, coupled to said scanning and generating means, for detecting a particular one of said scanning signals having a predetermined characteristic from among said plurality of scanning signals;
means, coupled to said detecting means for determining a fixed portion of said printed pattern corresponding to said detected scanning signal;
means, coupled to said determining means, for generating characteristic data corresponding to said fixed portion of said printed pattern and defining it as a start point;
standard reference data generating means for generating reference data representing a characteristic of a scanning signal that would result from scanning a standard printed pattern;
means for calculating a degree of similarity between the data generated by said characteristic data generating means and said reference data;
and
means, coupled to said calculating means, for determining the kind and/or genuineness of said examined printed matter from said degree of similarity calculated by said similarity calculating means.

5 more elements

A printed matter identification system comprising:

means for scanning a printed pattern of said printed matter and generating a plurality of scanning signals indicative thereof, each scanning signal including a number of picture element signals;
summing means for summing the picture element signals of each of the scanning signals and generating successive sum signals as examined multi-value data for each of said scanning signals;
means for generating reference multi-value data corresponding to a reference printed pattern;
and
means for calculating a degree of similarity between said examined multi-value data and said reference multi-value data;
means for determining the kind and/or genuineness of said examined printed matter from the similarity calculated by said similarity calculating means.

3 more elements

Dependencies are inferred from the claim text.