JPS56145471A - Extraction method of on-line character feature - Google Patents

Extraction method of on-line character feature

Info

Publication number
JPS56145471A
JPS56145471A JP4865380A JP4865380A JPS56145471A JP S56145471 A JPS56145471 A JP S56145471A JP 4865380 A JP4865380 A JP 4865380A JP 4865380 A JP4865380 A JP 4865380A JP S56145471 A JPS56145471 A JP S56145471A
Authority
JP
Japan
Prior art keywords
circuit
features
variation
character
inputted
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
JP4865380A
Other languages
Japanese (ja)
Other versions
JPS596420B2 (en
Inventor
Tadashi Hiura
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.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Electric Industry Co 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 Oki Electric Industry Co Ltd filed Critical Oki Electric Industry Co Ltd
Priority to JP55048653A priority Critical patent/JPS596420B2/en
Publication of JPS56145471A publication Critical patent/JPS56145471A/en
Publication of JPS596420B2 publication Critical patent/JPS596420B2/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V30/00—Character recognition; Recognising digital ink; Document-oriented image-based pattern recognition
    • G06V30/10—Character recognition
    • G06V30/18—Extraction of features or characteristics of the image
    • G06V30/182—Extraction of features or characteristics of the image by coding the contour of the pattern
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V30/00—Character recognition; Recognising digital ink; Document-oriented image-based pattern recognition
    • G06V30/10—Character recognition

Abstract

PURPOSE:To improve the rate of discrimination by dividing strokes, constituting a character, into elements features approximation and by discriminating the character by combinations of the appearance orde of those element features. CONSTITUTION:Coordinate position information written in memory circuit 700 is read by three points each at a time and processed by direction-quantitizing circuit 701 and distance calculating circuit 702, whose output direction-quantitized value and distance value are inputted to multiplying circuit 703 to calculate the quantity of variation. The distance value is stored in memory circuit 705 and also inputted to adding circuit 706 to calculate the overall length, and it is further inputted to averaging circuit 707 to find the average of distance values. The quantity of variation is stored in memory circuit 704 and also compared with a constant value by comparator 708. On the basis of those quantity of variation, distance value, etc., whether each stroke is straight or curved is judged. Then, the shape of curvature of a segment connecting coordinate points in each stroke is approximated correspondingly to the predetermined shape of elements feature to extract the element features. Those extracted element features are combined in the order of appearance to extract character features.
JP55048653A 1980-04-15 1980-04-15 Online character feature extraction method Expired JPS596420B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55048653A JPS596420B2 (en) 1980-04-15 1980-04-15 Online character feature extraction method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55048653A JPS596420B2 (en) 1980-04-15 1980-04-15 Online character feature extraction method

Publications (2)

Publication Number Publication Date
JPS56145471A true JPS56145471A (en) 1981-11-12
JPS596420B2 JPS596420B2 (en) 1984-02-10

Family

ID=12809305

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55048653A Expired JPS596420B2 (en) 1980-04-15 1980-04-15 Online character feature extraction method

Country Status (1)

Country Link
JP (1) JPS596420B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5949656A (en) * 1982-09-14 1984-03-22 Fujitsu Ltd Linear and arcuate approximation system of linear pattern
JPS5969878A (en) * 1982-10-14 1984-04-20 Nec Corp On-line character recognizing method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0520113Y2 (en) * 1986-03-05 1993-05-26

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5949656A (en) * 1982-09-14 1984-03-22 Fujitsu Ltd Linear and arcuate approximation system of linear pattern
JPH0519750B2 (en) * 1982-09-14 1993-03-17 Fujitsu Ltd
JPS5969878A (en) * 1982-10-14 1984-04-20 Nec Corp On-line character recognizing method
JPH0432432B2 (en) * 1982-10-14 1992-05-29

Also Published As

Publication number Publication date
JPS596420B2 (en) 1984-02-10

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