DE2239765C2 - Anordnungen zum Bestimmen des Randes eines Zeichens - Google Patents

Anordnungen zum Bestimmen des Randes eines Zeichens

Info

Publication number
DE2239765C2
DE2239765C2 DE2239765A DE2239765A DE2239765C2 DE 2239765 C2 DE2239765 C2 DE 2239765C2 DE 2239765 A DE2239765 A DE 2239765A DE 2239765 A DE2239765 A DE 2239765A DE 2239765 C2 DE2239765 C2 DE 2239765C2
Authority
DE
Germany
Prior art keywords
edge direction
operator
edge
positions
values
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
DE2239765A
Other languages
German (de)
English (en)
Other versions
DE2239765A1 (de
Inventor
Peter South Nutfield Horley Surrey Saraga
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of DE2239765A1 publication Critical patent/DE2239765A1/de
Application granted granted Critical
Publication of DE2239765C2 publication Critical patent/DE2239765C2/de
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/30—Low-molecular-weight compounds
    • C08G18/38—Low-molecular-weight compounds having heteroatoms other than oxygen
    • C08G18/3878—Low-molecular-weight compounds having heteroatoms other than oxygen having phosphorus
    • C08G18/3882—Low-molecular-weight compounds having heteroatoms other than oxygen having phosphorus having phosphorus bound to oxygen only
    • C08G18/3887—Phosphite compounds
    • 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
    • G06V30/18—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
    • G06V30/1823—Extraction of features or characteristics of the image by coding the contour of the pattern using vector-coding
    • 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)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Character Input (AREA)
  • Character Discrimination (AREA)
  • Image Processing (AREA)
DE2239765A 1971-08-17 1972-08-12 Anordnungen zum Bestimmen des Randes eines Zeichens Expired DE2239765C2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB3852871A GB1401008A (en) 1971-08-17 1971-08-17 Character recognition apparatus
GB3852771 1971-08-17
GB948872 1972-03-01

Publications (2)

Publication Number Publication Date
DE2239765A1 DE2239765A1 (de) 1973-03-08
DE2239765C2 true DE2239765C2 (de) 1984-04-12

Family

ID=27255375

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2239765A Expired DE2239765C2 (de) 1971-08-17 1972-08-12 Anordnungen zum Bestimmen des Randes eines Zeichens

Country Status (6)

Country Link
US (1) US3899771A (cg-RX-API-DMAC10.html)
JP (1) JPS4830331A (cg-RX-API-DMAC10.html)
DE (1) DE2239765C2 (cg-RX-API-DMAC10.html)
FR (1) FR2150150A5 (cg-RX-API-DMAC10.html)
GB (1) GB1401008A (cg-RX-API-DMAC10.html)
NL (1) NL7210970A (cg-RX-API-DMAC10.html)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3419140A1 (de) * 1984-05-23 1985-11-28 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Verfahren zur omnidirektionalen merkmalserkennung in einem sensorsehfeld
DE4135881A1 (de) * 1991-10-31 1993-05-06 Hassan Prof. Duebendorf Ch Nour Eldin Verfahren und vorrichtung zur extraktion der konturen von objekten

Families Citing this family (49)

* Cited by examiner, † Cited by third party
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GB1487920A (en) * 1973-12-21 1977-10-05 Mullard Ltd Character thinning apparatus
US4110736A (en) * 1974-04-24 1978-08-29 Agency Of Industrial Science & Technology Shape recognition system
US3996559A (en) * 1974-11-07 1976-12-07 International Business Machines Corporation Method and apparatus for accessing horizontal sequences, vertical sequences and regularly spaced rectangular subarrays from an array stored in a modified word organized random access memory system
US3995253A (en) * 1975-03-03 1976-11-30 International Business Machines Corporation Method and apparatus for accessing horizontal sequences, vertical sequences, and rectangular subarrays from an array stored in a modified word organized random access memory system
US4281312A (en) * 1975-11-04 1981-07-28 Massachusetts Institute Of Technology System to effect digital encoding of an image
US4020463A (en) * 1976-02-27 1977-04-26 Recognition Equipment Incorporated Apparatus and a method for storage and retrieval of image patterns
US4090174A (en) * 1976-11-01 1978-05-16 International Business Machines Corporation Method and apparatus for accessing horizontal sequences, vertical sequences and rectangular subarrays from an array stored in a modified word organized random access memory system
US4167728A (en) * 1976-11-15 1979-09-11 Environmental Research Institute Of Michigan Automatic image processor
US4174514A (en) * 1976-11-15 1979-11-13 Environmental Research Institute Of Michigan Parallel partitioned serial neighborhood processors
US4156230A (en) * 1977-11-02 1979-05-22 Rockwell International Corporation Method and apparatus for automatic extraction of fingerprint cores and tri-radii
US4368463A (en) * 1979-03-21 1983-01-11 Sigma Electronics Limited Graphic display area classification
US4290049A (en) * 1979-09-10 1981-09-15 Environmental Research Institute Of Michigan Dynamic data correction generator for an image analyzer system
US4442543A (en) * 1979-09-10 1984-04-10 Environmental Research Institute Bit enable circuitry for an image analyzer system
US4301443A (en) * 1979-09-10 1981-11-17 Environmental Research Institute Of Michigan Bit enable circuitry for an image analyzer system
US4464788A (en) * 1979-09-10 1984-08-07 Environmental Research Institute Of Michigan Dynamic data correction generator for an image analyzer system
US4773098A (en) * 1980-05-27 1988-09-20 Texas Instruments Incorporated Method of optical character recognition
DE3176044D1 (en) * 1980-05-27 1987-04-30 Texas Instruments Inc Didactic device such as doll having simulated sight and voice
US4395697A (en) * 1980-08-15 1983-07-26 Environmental Research Institute Of Michigan Off-image detection circuit for an image analyzer
AU7172781A (en) * 1980-12-24 1982-07-20 Isaacson, J.D. Autonomic string-manipulation system
US4460958A (en) * 1981-01-26 1984-07-17 Rca Corporation Window-scanned memory
US4434502A (en) 1981-04-03 1984-02-28 Nippon Electric Co., Ltd. Memory system handling a plurality of bits as a unit to be processed
US4538299A (en) * 1981-12-04 1985-08-27 International Remote Imaging Systems, Inc. Method and apparatus for locating the boundary of an object
US4665554A (en) * 1983-07-13 1987-05-12 Machine Vision International Corporation Apparatus and method for implementing dilation and erosion transformations in digital image processing
US4628532A (en) * 1983-07-14 1986-12-09 Scan Optics, Inc. Alphanumeric handprint recognition
JPS6055476A (ja) 1983-09-06 1985-03-30 Mitsubishi Electric Corp 画像切り出し回路
JPS6063405A (ja) * 1983-09-16 1985-04-11 Fujitsu Ltd パタ−ン検査方法及びその装置
US4665551A (en) * 1983-12-08 1987-05-12 Machine Vision International Corporation Apparatus and method for implementing transformations in digital image processing
US4602275A (en) * 1984-03-19 1986-07-22 Rca Corporation Television memory system
US4641356A (en) * 1984-08-24 1987-02-03 Machine Vision International Corporation Apparatus and method for implementing dilation and erosion transformations in grayscale image processing
DE3542484A1 (de) * 1985-11-30 1987-07-02 Ant Nachrichtentech Verfahren zur erkennung von kantenstrukturen in einem bildsignal
JP2556484B2 (ja) * 1986-10-20 1996-11-20 キヤノン株式会社 図形輪郭抽出装置
US4949390A (en) * 1987-04-16 1990-08-14 Applied Vision Systems, Inc. Interconnect verification using serial neighborhood processors
JPH02130692A (ja) * 1988-11-11 1990-05-18 Canon Inc 特徴抽出回路
GB2230886A (en) * 1989-04-29 1990-10-31 Marconi Gec Ltd Recognition of shapes
US5666440A (en) * 1991-07-31 1997-09-09 Victor Company Of Japan, Ltd. Method and apparatus for extracting outline data from bi-level image data
US5321770A (en) * 1991-11-19 1994-06-14 Xerox Corporation Method for determining boundaries of words in text
CA2077969C (en) * 1991-11-19 1997-03-04 Daniel P. Huttenlocher Method of deriving wordshapes for subsequent comparison
CA2077970C (en) * 1991-11-19 1999-02-23 Daniel P. Huttenlocher Optical word recognition by examination of word shape
JP3576570B2 (ja) * 1991-11-19 2004-10-13 ゼロックス コーポレイション 比較方法
US5841903A (en) * 1992-01-17 1998-11-24 Yamaha Corporation Method and device for extracting a connected component of image data
JP3853034B2 (ja) * 1997-08-13 2006-12-06 シスメックス株式会社 物体の境界決定方法および装置並びに物体の境界決定プログラムを記録した記録媒体
US6975764B1 (en) * 1997-11-26 2005-12-13 Cognex Technology And Investment Corporation Fast high-accuracy multi-dimensional pattern inspection
US7016539B1 (en) 1998-07-13 2006-03-21 Cognex Corporation Method for fast, robust, multi-dimensional pattern recognition
US7392287B2 (en) 2001-03-27 2008-06-24 Hemisphere Ii Investment Lp Method and apparatus for sharing information using a handheld device
US7190834B2 (en) 2003-07-22 2007-03-13 Cognex Technology And Investment Corporation Methods for finding and characterizing a deformed pattern in an image
US8081820B2 (en) 2003-07-22 2011-12-20 Cognex Technology And Investment Corporation Method for partitioning a pattern into optimized sub-patterns
US7587086B2 (en) * 2004-06-04 2009-09-08 Microsoft Corporation Identifying selected pixels in a digital image
US8437502B1 (en) 2004-09-25 2013-05-07 Cognex Technology And Investment Corporation General pose refinement and tracking tool
US9679224B2 (en) 2013-06-28 2017-06-13 Cognex Corporation Semi-supervised method for training multiple pattern recognition and registration tool models

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1171627A (en) * 1966-10-07 1969-11-26 Post Office Improvements in or relating to Character Recognition Machines
US3766520A (en) * 1971-11-10 1973-10-16 Regonition Equipment Inc Character reader with handprint capability

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3419140A1 (de) * 1984-05-23 1985-11-28 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Verfahren zur omnidirektionalen merkmalserkennung in einem sensorsehfeld
DE4135881A1 (de) * 1991-10-31 1993-05-06 Hassan Prof. Duebendorf Ch Nour Eldin Verfahren und vorrichtung zur extraktion der konturen von objekten
DE4135881C2 (de) * 1991-10-31 1998-04-02 Eldin Hassan Prof Nour Verfahren und Vorrichtung zur Extraktion der Konturen von Objekten

Also Published As

Publication number Publication date
US3899771A (en) 1975-08-12
FR2150150A5 (cg-RX-API-DMAC10.html) 1973-03-30
DE2239765A1 (de) 1973-03-08
GB1401008A (en) 1975-07-16
JPS4830331A (cg-RX-API-DMAC10.html) 1973-04-21
NL7210970A (cg-RX-API-DMAC10.html) 1973-02-20

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Legal Events

Date Code Title Description
OD Request for examination
D2 Grant after examination
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee