JPS5665275A - Pattern recognition system - Google Patents

Pattern recognition system

Info

Publication number
JPS5665275A
JPS5665275A JP14133679A JP14133679A JPS5665275A JP S5665275 A JPS5665275 A JP S5665275A JP 14133679 A JP14133679 A JP 14133679A JP 14133679 A JP14133679 A JP 14133679A JP S5665275 A JPS5665275 A JP S5665275A
Authority
JP
Japan
Prior art keywords
pattern
normal direction
character
sampling
unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP14133679A
Other languages
Japanese (ja)
Other versions
JPS6365991B2 (en
Inventor
Hiromichi Fujisawa
Osamu Kunisaki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP14133679A priority Critical patent/JPS5665275A/en
Publication of JPS5665275A publication Critical patent/JPS5665275A/en
Publication of JPS6365991B2 publication Critical patent/JPS6365991B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To get rid of a sampling error caused by turbulence of the central line, by sampling the directional property by executing the space differentiation to a pattern, without deriving the central line, in case of sampling the directional property of the character pattern.
CONSTITUTION: The pattern recognition system is constituted of CPU 101, the microprocessor 100 by the microprocessing unit MMU102, the scanning mechanism 300 for observing a character, the preprocessing unit 200 for preprocessing, the feature sampling unit 400, the recognition processing unit 500 for matching a pattern, and the output unit 600 for outputting the recognition result. And the space differential value of the orthogonal two axes of a two-dimensional character pattern obtained by photoelectric conversion is calculated, the normal direction of the gradient of the pattern is calculated from this differential value, and the quantized normal direction which has quantized the normal direction is derived. The directional freature is generated by adding the value according to strength of the gradient, to the feature face provided corresponding to this normal direction, the two- dimensional gradate processing is executed to this pattern, the pattern matching of said pattern and the standard pattern is executed in the prescribed direction, and the character is recognized.
COPYRIGHT: (C)1981,JPO&Japio
JP14133679A 1979-11-02 1979-11-02 Pattern recognition system Granted JPS5665275A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14133679A JPS5665275A (en) 1979-11-02 1979-11-02 Pattern recognition system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14133679A JPS5665275A (en) 1979-11-02 1979-11-02 Pattern recognition system

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP63035222A Division JPS63233487A (en) 1988-02-19 1988-02-19 Optical character reader

Publications (2)

Publication Number Publication Date
JPS5665275A true JPS5665275A (en) 1981-06-02
JPS6365991B2 JPS6365991B2 (en) 1988-12-19

Family

ID=15289574

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14133679A Granted JPS5665275A (en) 1979-11-02 1979-11-02 Pattern recognition system

Country Status (1)

Country Link
JP (1) JPS5665275A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58200381A (en) * 1982-05-18 1983-11-21 Agency Of Ind Science & Technol Character reader
JPS62290985A (en) * 1986-06-11 1987-12-17 Hitachi Ltd Pattern recognizing device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58200381A (en) * 1982-05-18 1983-11-21 Agency Of Ind Science & Technol Character reader
JPH0449153B2 (en) * 1982-05-18 1992-08-10 Kogyo Gijutsuin
JPS62290985A (en) * 1986-06-11 1987-12-17 Hitachi Ltd Pattern recognizing device

Also Published As

Publication number Publication date
JPS6365991B2 (en) 1988-12-19

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