GB1311029A - Apparatus for recognising graphic symbols - Google Patents

Apparatus for recognising graphic symbols

Info

Publication number
GB1311029A
GB1311029A GB6121070A GB6121070A GB1311029A GB 1311029 A GB1311029 A GB 1311029A GB 6121070 A GB6121070 A GB 6121070A GB 6121070 A GB6121070 A GB 6121070A GB 1311029 A GB1311029 A GB 1311029A
Authority
GB
United Kingdom
Prior art keywords
character
threshold
unit
output
stores
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.)
Expired
Application number
GB6121070A
Other languages
English (en)
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.)
Olivetti SpA
Original Assignee
Olivetti SpA
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 Olivetti SpA filed Critical Olivetti SpA
Publication of GB1311029A publication Critical patent/GB1311029A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/20—Image preprocessing
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G06V30/16—Image preprocessing
    • G06V30/162—Quantising the image signal
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G06V30/16—Image preprocessing
    • G06V30/168—Smoothing or thinning of the pattern; Skeletonisation
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G06V30/20—Combination of acquisition, preprocessing or recognition functions
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Character Discrimination (AREA)
  • Character Input (AREA)
  • Image Processing (AREA)
  • Image Input (AREA)
GB6121070A 1969-12-24 1970-12-23 Apparatus for recognising graphic symbols Expired GB1311029A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT5450069 1969-12-24

Publications (1)

Publication Number Publication Date
GB1311029A true GB1311029A (en) 1973-03-21

Family

ID=11287346

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6121070A Expired GB1311029A (en) 1969-12-24 1970-12-23 Apparatus for recognising graphic symbols

Country Status (6)

Country Link
US (1) US3715724A (cg-RX-API-DMAC7.html)
JP (1) JPS4923054B1 (cg-RX-API-DMAC7.html)
DE (1) DE2063597A1 (cg-RX-API-DMAC7.html)
FR (1) FR2074013A5 (cg-RX-API-DMAC7.html)
GB (1) GB1311029A (cg-RX-API-DMAC7.html)
SU (1) SU382311A3 (cg-RX-API-DMAC7.html)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3918049A (en) * 1972-12-26 1975-11-04 Ibm Thresholder for analog signals
US3973239A (en) * 1973-10-17 1976-08-03 Hitachi, Ltd. Pattern preliminary processing system
JPS523655U (cg-RX-API-DMAC7.html) * 1975-06-23 1977-01-11
FR2349894A1 (fr) * 1976-04-26 1977-11-25 Honeywell Bull Soc Ind Perfectionnements aux systemes de reconnaissance de caracteres imprimes
DE2706080C2 (de) * 1977-02-12 1986-10-23 Philips Patentverwaltung Gmbh, 2000 Hamburg Verfahren zur adaptiven Quantisierung von Transformationskoeffizienten eines Bildes und Anordnung zum Durchführen des Verfahrens
FR2435871A1 (fr) * 1978-09-08 1980-04-04 Thomson Csf Dispositif a seuil permettant de distinguer le blanc du noir sur un document, et emetteur de telecopie comportant un tel dispositif
DE3112628C2 (de) * 1981-03-30 1987-02-26 Siemens AG, 1000 Berlin und 8000 München Verfahren und Anodrnung zum Einstellen des Diskriminators einer Bildauswerteeinrichtung
DE3174105D1 (en) * 1981-12-23 1986-04-17 Ibm Method of recognizing characters in an optical document reader
JPS60254279A (ja) * 1984-05-31 1985-12-14 Fuji Electric Co Ltd ２値化しきい値の決定方法
DE3650496T2 (de) * 1985-04-17 1996-10-31 Hitachi Ltd Bildverarbeitungsgerät
US4742557A (en) 1985-11-08 1988-05-03 Ncr Corporation Adaptive character extraction method and system
US4965679A (en) * 1989-02-27 1990-10-23 Eastman Kodak Company Method for electronically duplicating film images while maintaining a high degree of image quality
US4903141A (en) * 1989-02-27 1990-02-20 Eastman Kodak Company Apparatus for electronically duplicating film images while maintaining a high degree of image quality
US4987604A (en) * 1989-06-02 1991-01-22 Delco Electronics Corporation Second opinion method of pattern recognition error reduction
US4995091A (en) * 1989-10-25 1991-02-19 Mazda Motor Manufacturing (Usa) Corporation Method of and apparatus for detecting objects in an assembly line
US5054094A (en) * 1990-05-07 1991-10-01 Eastman Kodak Company Rotationally impervious feature extraction for optical character recognition
DE69504069T2 (de) * 1994-06-07 1998-12-10 United Parcel Service Of America, Inc., Atlanta, Ga. Verfahren und gerät zu dekodierung von zweidimensionalen zeichen im raumbereich
JP3264932B2 (ja) * 1995-01-31 2002-03-11 ユナイテッド パーセル サービス オブ アメリカ インコーポレイテッド テキストを含む画像における背景から前景を分離する方法及び装置
US6728391B1 (en) 1999-12-03 2004-04-27 United Parcel Service Of America, Inc. Multi-resolution label locator
JP2013123812A (ja) * 2011-12-13 2013-06-24 Canon Inc 検査装置、検査方法、コンピュータプログラム

Also Published As

Publication number Publication date
US3715724A (en) 1973-02-06
DE2063597A1 (de) 1971-07-01
FR2074013A5 (cg-RX-API-DMAC7.html) 1971-10-01
JPS4923054B1 (cg-RX-API-DMAC7.html) 1974-06-13
SU382311A3 (cg-RX-API-DMAC7.html) 1973-05-22

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees