Communications: electrical – Digital comparator systems
Patent
1980-04-17
1982-02-23
Boudreau, Leo H.
Communications: electrical
Digital comparator systems
3401463J, G06K 946
Patent
active
043171095
ABSTRACT:
The present system comprises (a) a character input unit for providing the coordinates of a plurality of points of an input character, (b) a pre-process unit for normalizing the size and the position of said input character, (c) three points approximate unit for providing three feature points for each stroke of the input character, (d) a reference pattern storage for providing the coordinates of the feature points for each stroke of the reference characters, (e) a stroke difference calculator for providing the sum p.sub.i of the length between the feature points of the k'th stroke of the input character and the feature points of the i'th stroke of the j'th reference character, (f) a storage for storing the stroke difference p.sub.i, (g) means for operating the members (e) and (f) repetitively for all the strokes of the j'th reference character, (h) means for detecting the minimum value p.sub.min among the stroke difference p.sub.i thus obtained, (i) means for operating the members (e), (f), (g) and (h) repetitively for all the strokes of the input character, and accumulating the value p.sub.min to provide the value d.theta. .sub.j, which is the pattern difference between the input character and the j'th reference character, (j) a storage for storing the value d.theta..sub.j , (k) means for operating the members (i), and (j) repetitively for all the reference characters to provide the set of d.theta..sub.j for the given input character, and (l) means for detecting the minimum value among the values d.theta..sub.j and determining the input character as the reference character which provides the minimum value of d.theta..sub.j.
REFERENCES:
patent: 3111646 (1963-11-01), Harmon
patent: 3133266 (1964-05-01), Frishkopf
patent: 4024500 (1977-05-01), Herbst et al.
patent: 4028674 (1977-06-01), Chuang
Hanaki et al., "An On-Line Character Recognition . . . ", Pattern Recognition, vol. 8, Apr. 1976, pp. 63-71.
Arakawa et al., "On-Line Recognition of Handwritten Characters", Review of the Electrical Communication Laboratories, vol. 26, Nos. 11-12, Nov.-Dec. 1978.
Groner et al., "On-Line Computer Classification of Handprinted Chinese Characters", IEEE Trans. on Electronic Computers, Dec. 1967, pp. 856-860.
Masuda Isao
Odaka Kazumi
Boudreau Leo H.
Nippon Telegraph & Telephone Public Corp.
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