JPS57153387A - Character recognizing method - Google Patents

Character recognizing method

Info

Publication number
JPS57153387A
JPS57153387A JP56039799A JP3979981A JPS57153387A JP S57153387 A JPS57153387 A JP S57153387A JP 56039799 A JP56039799 A JP 56039799A JP 3979981 A JP3979981 A JP 3979981A JP S57153387 A JPS57153387 A JP S57153387A
Authority
JP
Japan
Prior art keywords
character
picture element
feature quantity
feature
quantizer
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.)
Pending
Application number
JP56039799A
Other languages
Japanese (ja)
Inventor
Koichi Ejiri
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP56039799A priority Critical patent/JPS57153387A/en
Publication of JPS57153387A publication Critical patent/JPS57153387A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/40—Extraction of image or video features
    • G06V10/44—Local feature extraction by analysis of parts of the pattern, e.g. by detecting edges, contours, loops, corners, strokes or intersections; Connectivity analysis, e.g. of connected components
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Character Discrimination (AREA)

Abstract

PURPOSE:To recognize a character with high accuracy, by deriving the quantity regarding the number of each different direction strokes of a character pattern, and its length and position, and using it as a feature quantity. CONSTITUTION:A document, etc. are read by each picture element unit by a scanner 100, and are sent to a quantizer 102 as an analog picture element density signal. The inputted picture element density signal is binary-coded by the quantizer 102 and is sent to a preprocessing circuit 104. To a picture data whose smoothing processing has ended, both extraction of a stroke of a character pattern and extraction of the quantity of a feature are executed by a processing circuit 106. A pattern matching circuit 110 executes pattern matching by use of the feature quantity of an already known character read out from a dictionary registered in a file device 108, and the feature quantity of the character pattern provided from the processing circuit 106, and outputs the most similar dictionary code.
JP56039799A 1981-03-19 1981-03-19 Character recognizing method Pending JPS57153387A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56039799A JPS57153387A (en) 1981-03-19 1981-03-19 Character recognizing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56039799A JPS57153387A (en) 1981-03-19 1981-03-19 Character recognizing method

Publications (1)

Publication Number Publication Date
JPS57153387A true JPS57153387A (en) 1982-09-21

Family

ID=12562997

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56039799A Pending JPS57153387A (en) 1981-03-19 1981-03-19 Character recognizing method

Country Status (1)

Country Link
JP (1) JPS57153387A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61188679A (en) * 1985-02-15 1986-08-22 インタ−ナショナル　ビジネス　マシ−ンズ　コ−ポレ−ション Character recognition equipment by stroke approximate linearity extraction
JPS62281096A (en) * 1986-05-30 1987-12-05 Canon Inc Character recognition device
JPS62281097A (en) * 1986-05-30 1987-12-05 Canon Inc Character recognizing device
JPH076208A (en) * 1993-06-18 1995-01-10 Nec Corp Character recognition device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5727379A (en) * 1980-07-25 1982-02-13 Fujitsu Ltd Character recognition system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5727379A (en) * 1980-07-25 1982-02-13 Fujitsu Ltd Character recognition system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61188679A (en) * 1985-02-15 1986-08-22 インタ−ナショナル　ビジネス　マシ−ンズ　コ−ポレ−ション Character recognition equipment by stroke approximate linearity extraction
JPS62281096A (en) * 1986-05-30 1987-12-05 Canon Inc Character recognition device
JPS62281097A (en) * 1986-05-30 1987-12-05 Canon Inc Character recognizing device
JP2578767B2 (en) * 1986-05-30 1997-02-05 キヤノン株式会社 Image processing method
JP2578768B2 (en) * 1986-05-30 1997-02-05 キヤノン株式会社 Image processing method
JPH076208A (en) * 1993-06-18 1995-01-10 Nec Corp Character recognition device

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