CA2022075A1 - Filtre a produits vectoriels - Google Patents

Filtre a produits vectoriels

Info

Publication number
CA2022075A1
CA2022075A1 CA2022075A CA2022075A CA2022075A1 CA 2022075 A1 CA2022075 A1 CA 2022075A1 CA 2022075 A CA2022075 A CA 2022075A CA 2022075 A CA2022075 A CA 2022075A CA 2022075 A1 CA2022075 A1 CA 2022075A1
Authority
CA
Canada
Prior art keywords
stroke
cross
product
product filter
vectors
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
CA2022075A
Other languages
English (en)
Other versions
CA2022075C (fr
Inventor
James S. Lipscomb
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.)
International Business Machines Corp
Original Assignee
James S. Lipscomb
International Business Machines Corporation
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 James S. Lipscomb, International Business Machines Corporation filed Critical James S. Lipscomb
Publication of CA2022075A1 publication Critical patent/CA2022075A1/fr
Application granted granted Critical
Publication of CA2022075C publication Critical patent/CA2022075C/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • 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
    • G06V30/32—Digital ink
    • G06V30/333—Preprocessing; Feature extraction
    • G06V30/347—Sampling; Contour coding; Stroke extraction

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • General Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Character Discrimination (AREA)
  • Image Processing (AREA)
CA002022075A 1989-10-03 1990-07-26 Filtre a produits vectoriels Expired - Fee Related CA2022075C (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/416,564 US5023918A (en) 1989-10-03 1989-10-03 Cross-product filter
US416,564 1989-10-03

Publications (2)

Publication Number Publication Date
CA2022075A1 true CA2022075A1 (fr) 1991-04-04
CA2022075C CA2022075C (fr) 1996-01-02

Family

ID=23650454

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002022075A Expired - Fee Related CA2022075C (fr) 1989-10-03 1990-07-26 Filtre a produits vectoriels

Country Status (4)

Country Link
US (1) US5023918A (fr)
EP (1) EP0421160A3 (fr)
JP (1) JPH03125274A (fr)
CA (1) CA2022075C (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5333209A (en) * 1992-03-24 1994-07-26 At&T Bell Laboratories Method of recognizing handwritten symbols
JP3192468B2 (ja) * 1992-04-16 2001-07-30 パイオニア株式会社 オンライン手書き文字認識装置及び認識方法
JP3155616B2 (ja) * 1992-06-25 2001-04-16 キヤノン株式会社 文字認識方法及び装置
EP0578432A3 (en) * 1992-07-06 1994-06-22 Canon Kk Similarity determination among patterns using affine-invariant features
WO1994003853A1 (fr) * 1992-07-29 1994-02-17 Communication Intelligence Corporation Procede et appareil de compression d'encre electronique
EP0600585A3 (fr) * 1992-11-20 1994-11-02 Mutoh Ind Ltd Système pour identifier des dessins à main.
JP3026698B2 (ja) * 1993-05-27 2000-03-27 キヤノン株式会社 画像処理方法及びその装置
JP2626528B2 (ja) * 1993-11-22 1997-07-02 日本電気株式会社 図形認識装置
EP0654755B1 (fr) * 1993-11-23 2000-08-02 International Business Machines Corporation Système et méthode pour la reconnaissance automatique d'écriture manuscrite avec un alphabet à label chirographique indépendant des utilisateurs
TW397951B (en) * 1995-06-05 2000-07-11 Motorola Inc Method and microprocessor for preprocessing handwriting having characters composed of a preponderance of straight line segments
JPH09223195A (ja) * 1996-02-06 1997-08-26 Hewlett Packard Co <Hp> 文字認識方法
US5920647A (en) * 1997-08-12 1999-07-06 Motorola, Inc. Method and apparatus for recognition of hand-printed characters represented as an electronic ink stream using a box filtering technique
WO1999010834A1 (fr) * 1997-08-27 1999-03-04 Cybermarche, Inc. Procede et appareil de saisie, de stockage et d'indexation de l'ecriture manuscrite
US7567711B2 (en) * 2005-08-01 2009-07-28 Microsoft Corporation Cleaning up of handwriting intra-stroke and inter-stroke overtracing
JP5879858B2 (ja) * 2011-09-20 2016-03-08 富士ゼロックス株式会社 筆記情報生成装置、筆記情報生成システム及びプログラム

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3993976A (en) * 1974-05-13 1976-11-23 The United States Of America As Represented By The Secretary Of The Air Force Method and apparatus for pattern analysis
US4282511A (en) * 1980-01-07 1981-08-04 Rca Corporation Apparatus for discerning the noticeable presence of spatial fluctuations of intensity within a two-dimensional visual field
US4534060A (en) * 1983-08-09 1985-08-06 Pencept, Inc. Method and apparatus for removing noise at the ends of a stroke
NO865239L (no) * 1985-04-26 1986-12-22 Battelle Memorial Institute Fremgangsmaate for sammenligning av en haandskrift med en referanseskrift.
US4731859A (en) * 1985-09-20 1988-03-15 Environmental Research Institute Of Michigan Multispectral/spatial pattern recognition system
US4837843A (en) * 1987-06-19 1989-06-06 Hughes Aircraft Company Hybrid optical and electronic associative memory

Also Published As

Publication number Publication date
JPH03125274A (ja) 1991-05-28
EP0421160A3 (en) 1992-11-04
EP0421160A2 (fr) 1991-04-10
CA2022075C (fr) 1996-01-02
US5023918A (en) 1991-06-11

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed