DE602006016749D1 - Vorrichtung und verfahren zur zweistufigen dekodierung von hochdichten optischen symbolen - Google Patents

Vorrichtung und verfahren zur zweistufigen dekodierung von hochdichten optischen symbolen

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Publication number
DE602006016749D1
DE602006016749D1 DE602006016749T DE602006016749T DE602006016749D1 DE 602006016749 D1 DE602006016749 D1 DE 602006016749D1 DE 602006016749 T DE602006016749 T DE 602006016749T DE 602006016749 T DE602006016749 T DE 602006016749T DE 602006016749 D1 DE602006016749 D1 DE 602006016749D1
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DE
Germany
Prior art keywords
pixels
gray
dark
histogram
density optical
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.)
Active
Application number
DE602006016749T
Other languages
English (en)
Inventor
Robert M Liu
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.)
Omron Microscan Systems Inc
Original Assignee
Microscan Systems Inc
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 Microscan Systems Inc filed Critical Microscan Systems Inc
Publication of DE602006016749D1 publication Critical patent/DE602006016749D1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/14—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation using light without selection of wavelength, e.g. sensing reflected white light
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/14—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation using light without selection of wavelength, e.g. sensing reflected white light
    • G06K7/1404—Methods for optical code recognition
    • G06K7/146—Methods for optical code recognition the method including quality enhancement steps
    • G06K7/1469—Methods for optical code recognition the method including quality enhancement steps using sub-pixel interpolation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/14—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation using light without selection of wavelength, e.g. sensing reflected white light
    • G06K7/1404—Methods for optical code recognition
    • G06K7/146—Methods for optical code recognition the method including quality enhancement steps
    • G06K7/1478—Methods for optical code recognition the method including quality enhancement steps adapting the threshold for pixels in a CMOS or CCD pixel sensor for black and white recognition
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/14—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation using light without selection of wavelength, e.g. sensing reflected white light
    • G06K7/1404—Methods for optical code recognition
    • G06K7/146—Methods for optical code recognition the method including quality enhancement steps
    • G06K7/1486—Setting the threshold-width for bar codes to be decoded

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Artificial Intelligence (AREA)
  • Theoretical Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Electromagnetism (AREA)
  • Toxicology (AREA)
  • General Health & Medical Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Quality & Reliability (AREA)
  • Image Analysis (AREA)
  • Image Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Optical Communication System (AREA)
  • Studio Devices (AREA)
DE602006016749T 2005-03-23 2006-03-17 Vorrichtung und verfahren zur zweistufigen dekodierung von hochdichten optischen symbolen Active DE602006016749D1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/088,643 US7213761B2 (en) 2005-03-23 2005-03-23 Apparatus and process for two-stage decoding of high-density optical symbols
PCT/US2006/009640 WO2006102031A1 (en) 2005-03-23 2006-03-17 Apparatus and process for two-stage decoding of high-density optical symbols

Publications (1)

Publication Number Publication Date
DE602006016749D1 true DE602006016749D1 (de) 2010-10-21

Family

ID=36603630

Family Applications (1)

Application Number Title Priority Date Filing Date
DE602006016749T Active DE602006016749D1 (de) 2005-03-23 2006-03-17 Vorrichtung und verfahren zur zweistufigen dekodierung von hochdichten optischen symbolen

Country Status (9)

Country Link
US (1) US7213761B2 (de)
EP (1) EP1861810B1 (de)
JP (1) JP2008535058A (de)
KR (1) KR100920764B1 (de)
CN (1) CN101198961B (de)
AT (1) ATE480832T1 (de)
AU (1) AU2006227490B2 (de)
DE (1) DE602006016749D1 (de)
WO (1) WO2006102031A1 (de)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7213761B2 (en) * 2005-03-23 2007-05-08 Microscan Systems Incorporated Apparatus and process for two-stage decoding of high-density optical symbols
JP5115131B2 (ja) * 2007-10-11 2013-01-09 株式会社デンソーウェーブ 光学的情報読取装置
JP5119853B2 (ja) * 2007-10-19 2013-01-16 株式会社デンソーウェーブ 光学的情報読取装置
WO2010090159A1 (ja) * 2009-02-05 2010-08-12 株式会社オプトエレクトロニクス 光学的情報読取装置及び光学的情報読取方法
TWI423246B (zh) * 2009-08-21 2014-01-11 Primax Electronics Ltd 圖像處理方法及其相關裝置
CN102881259B (zh) * 2009-09-16 2015-05-20 致伸科技股份有限公司 图像处理方法及装置
US8267322B2 (en) * 2010-03-08 2012-09-18 Seiko Epson Corporation Method and apparatus for correcting decoding errors in machine-readable symbols
US8162223B2 (en) * 2010-03-08 2012-04-24 Seiko Epson Corporation Method and apparatus for creating pixel tokens from machine-readable symbols to improve decoding accuracy in low resolution images
TWI431584B (zh) 2010-09-15 2014-03-21 E Ink Holdings Inc 電子紙顯示器之驅動方法及其驅動裝置
JP5807602B2 (ja) * 2012-03-29 2015-11-10 株式会社デンソーウェーブ 情報コード読取装置
US10057498B1 (en) 2013-03-15 2018-08-21 Cognex Corporation Light field vision system camera and methods for using the same
US10691908B2 (en) * 2016-09-28 2020-06-23 3M Innovative Properties Company Hierarchichal optical element sets for machine-read articles
KR102588687B1 (ko) * 2017-10-30 2023-10-12 한국전자통신연구원 영상 기반 바코드 인식 장치 및 방법
EP3789906B1 (de) * 2019-09-05 2021-07-07 Sick Ag Bestimmen der modulgrösse eines optischen codes

Family Cites Families (21)

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Publication number Priority date Publication date Assignee Title
US4364089A (en) * 1979-10-31 1982-12-14 Westinghouse Electric Corp. Binary correlation video tracker
US4339745A (en) * 1980-05-14 1982-07-13 General Electric Company Optical character recognition
JPH0731717B2 (ja) * 1985-08-27 1995-04-10 住友電気工業株式会社 光学読取装置
JPH0477978A (ja) * 1990-07-20 1992-03-12 Nitsuko Corp バーコードの読取り方法
CN1046169C (zh) * 1992-09-30 1999-11-03 欧林巴斯光学工业股份有限公司 条型码数字化信号处理电路
CN1036808C (zh) * 1993-05-11 1997-12-24 欧林巴斯光学工业股份有限公司 可改变工作范围的条形码译码器及其译码方法
US5979763A (en) 1995-10-13 1999-11-09 Metanetics Corporation Sub-pixel dataform reader with dynamic noise margins
EP0895175B1 (de) 1997-08-01 2000-10-11 Datalogic S.P.A. Verfahren zum Abtasten eines Strichkodes
US6628808B1 (en) * 1999-07-28 2003-09-30 Datacard Corporation Apparatus and method for verifying a scanned image
US6577757B1 (en) * 1999-07-28 2003-06-10 Intelligent Reasoning Systems, Inc. System and method for dynamic image recognition
JP2001307013A (ja) * 2000-04-20 2001-11-02 Oki Electric Ind Co Ltd バーコード読取装置
US20020176001A1 (en) * 2001-05-11 2002-11-28 Miroslav Trajkovic Object tracking based on color distribution
DE10123406A1 (de) 2001-05-15 2002-11-21 Sick Ag Verfahren zum Erfassen von zweidimensionalen Codes
US7154515B2 (en) * 2001-06-15 2006-12-26 Perkinelmer, Inc. Method and apparatus for reducing printing artifacts of stitched images
US7331523B2 (en) * 2001-07-13 2008-02-19 Hand Held Products, Inc. Adaptive optical image reader
JP2004045356A (ja) * 2002-05-20 2004-02-12 Jfe Steel Kk 表面欠陥検出方法
US6845914B2 (en) 2003-03-06 2005-01-25 Sick Auto Ident, Inc. Method and system for verifying transitions between contrasting elements
WO2004093433A1 (ja) * 2003-04-15 2004-10-28 Fujitsu Limited コード認識方法及び装置
CN100481117C (zh) * 2004-03-15 2009-04-22 武汉矽感科技有限公司 一种二维条码编解码方法
US7303131B2 (en) * 2004-07-30 2007-12-04 Symbol Technologies, Inc. Automatic focusing system for imaging-based bar code reader
US7213761B2 (en) * 2005-03-23 2007-05-08 Microscan Systems Incorporated Apparatus and process for two-stage decoding of high-density optical symbols

Also Published As

Publication number Publication date
WO2006102031A1 (en) 2006-09-28
AU2006227490B2 (en) 2009-10-01
KR20070117681A (ko) 2007-12-12
EP1861810A1 (de) 2007-12-05
US20060213998A1 (en) 2006-09-28
AU2006227490A1 (en) 2006-09-28
KR100920764B1 (ko) 2009-10-09
CN101198961A (zh) 2008-06-11
JP2008535058A (ja) 2008-08-28
EP1861810B1 (de) 2010-09-08
ATE480832T1 (de) 2010-09-15
US7213761B2 (en) 2007-05-08
CN101198961B (zh) 2011-08-03

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