DE60139174D1 - Verfahren und Vorrichtung mit zweifacher Schwellwertbildung bei der Verarbeitung von Strichcodesignalen - Google Patents

Verfahren und Vorrichtung mit zweifacher Schwellwertbildung bei der Verarbeitung von Strichcodesignalen

Info

Publication number
DE60139174D1
DE60139174D1 DE60139174T DE60139174T DE60139174D1 DE 60139174 D1 DE60139174 D1 DE 60139174D1 DE 60139174 T DE60139174 T DE 60139174T DE 60139174 T DE60139174 T DE 60139174T DE 60139174 D1 DE60139174 D1 DE 60139174D1
Authority
DE
Germany
Prior art keywords
double
bar code
code signals
threshold method
processing bar
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 - Lifetime
Application number
DE60139174T
Other languages
English (en)
Inventor
Hong Tang
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.)
NCR International Inc
Original Assignee
NCR International 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 NCR International Inc filed Critical NCR International Inc
Application granted granted Critical
Publication of DE60139174D1 publication Critical patent/DE60139174D1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • G06K7/10544—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
    • G06K7/10821—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices
    • G06K7/10851—Circuits for pulse shaping, amplifying, eliminating noise signals, checking the function of the sensing device
    • 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
DE60139174T 2000-04-26 2001-04-05 Verfahren und Vorrichtung mit zweifacher Schwellwertbildung bei der Verarbeitung von Strichcodesignalen Expired - Lifetime DE60139174D1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US09/558,652 US6502751B1 (en) 2000-04-26 2000-04-26 Methods and apparatus for dual thresholding in processing of barcode signals

Publications (1)

Publication Number Publication Date
DE60139174D1 true DE60139174D1 (de) 2009-08-20

Family

ID=24230397

Family Applications (1)

Application Number Title Priority Date Filing Date
DE60139174T Expired - Lifetime DE60139174D1 (de) 2000-04-26 2001-04-05 Verfahren und Vorrichtung mit zweifacher Schwellwertbildung bei der Verarbeitung von Strichcodesignalen

Country Status (4)

Country Link
US (1) US6502751B1 (de)
EP (1) EP1150241B1 (de)
JP (1) JP2001357348A (de)
DE (1) DE60139174D1 (de)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4188104B2 (ja) 2003-02-21 2008-11-26 富士通株式会社 バーコード読取装置
US7216811B2 (en) * 2004-04-16 2007-05-15 Microscan Systems Incorporated Barcode scanner with linear automatic gain control (AGC), modulation transfer function detector, and selectable noise filter
KR100667778B1 (ko) * 2004-11-20 2007-01-11 삼성전자주식회사 바코드 판독 방법 및 장치
JP5258751B2 (ja) * 2006-04-27 2013-08-07 ファティーグ テクノロジー インコーポレイテッド アラインメント装置およびその使用方法
US20080266629A1 (en) * 2007-04-26 2008-10-30 Brown Dean R MEMS device of a scanner system having magnetic components disposed opposite to reflectance path
US7616366B2 (en) * 2007-04-26 2009-11-10 Microvision, Inc. MEMS device having a drive coil with curved segments
US7717341B2 (en) 2007-04-26 2010-05-18 Microvision, Inc. Bar code scanner having an adaptive threshold using a first derivative amplitude
US7619802B2 (en) 2007-04-26 2009-11-17 Microvision, Inc. Suspension for maintaining mirror flatness of a MEMS device in a scanner system or the like
US7679804B2 (en) * 2007-04-26 2010-03-16 Microvision, Inc. Non-resonant drive for adaptive trajectory of a scanner system having a MEMS device
US7857223B2 (en) * 2007-04-26 2010-12-28 Microvision, Inc. Scanning module for a scanner system having a MEMS device or the like
US7550713B2 (en) * 2007-04-26 2009-06-23 Microvision, Inc. System for determining an operational state of a MEMS based laser scanner
JP7066065B2 (ja) * 2019-07-19 2022-05-12 三菱電機株式会社 パラメータ同定装置、パラメータ同定方法およびコンピュータプログラム

Family Cites Families (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53128230A (en) 1977-04-14 1978-11-09 Shinko Electric Co Ltd Method of reading bar code information in label reader
US4740675A (en) 1986-04-10 1988-04-26 Hewlett-Packard Company Digital bar code slot reader with threshold comparison of the differentiated bar code signal
US4798943A (en) 1986-09-30 1989-01-17 Spectra-Physics, Inc. Method and system for control of a bar code scanner threshold
US4749879A (en) 1987-06-18 1988-06-07 Spectra-Physics, Inc. Signal transition detection method and system
JPH07101429B2 (ja) 1989-05-30 1995-11-01 富士通株式会社 バーコードリーダーのアナログ信号処理方式
US5612531A (en) 1993-03-08 1997-03-18 Symbol Technologies, Inc. Bar code reader with multiple sensitivity modes using variable thresholding comparisons
US5446272A (en) 1989-06-16 1995-08-29 Symbol Technologies, Inc. System for digitizing a scanned signal indicating changes in signal intensity
US5408081A (en) 1989-06-16 1995-04-18 Symbol Technologies, Inc. Digital circuit for a laser scanner using a first derivative signal and a comparison signal
US5272323A (en) 1989-11-22 1993-12-21 Symbol Technologies, Inc. Digitizer for barcode scanner
US5210397A (en) * 1990-05-03 1993-05-11 Psc, Inc. Differentiating and integrating circuit for translating bar code signals into corresponding pulses
US5828050A (en) * 1990-08-03 1998-10-27 Symbol Technologies, Inc. Light emitting laser diode scanner
US5268564A (en) * 1990-08-03 1993-12-07 Symbol Technologies, Inc. Bar code scanner actuated by detection of scanner motion
JP2716298B2 (ja) * 1991-10-04 1998-02-18 株式会社テック バーコード信号２値化装置
US5298728A (en) 1991-11-01 1994-03-29 Spectra-Physics Scanning System, Inc. Signal processing apparatus and method
US5311002A (en) * 1991-11-19 1994-05-10 Nec Corporation Circuit for dealing with a bar code signal and a high speed electric signal
CA2062106C (en) 1991-12-23 2002-08-20 Gregg Marwin Object sensing system for bar code laser scanners
US6047894A (en) 1993-05-07 2000-04-11 Spectra-Physics Scanning Systems, Inc. Signal conditioning for variable focus optical reader
US5463211A (en) 1993-05-07 1995-10-31 Spectra-Physics Scanning Systems, Inc. Method and apparatus for detecting transitions in a time sampled input signal
JP2815290B2 (ja) 1993-08-11 1998-10-27 富士通株式会社 バーコードリーダーにおける二値化装置
JP3475529B2 (ja) * 1994-11-25 2003-12-08 株式会社デンソー 光学情報読み取り装置の信号処理装置
US5814803A (en) 1994-12-23 1998-09-29 Spectra-Physics Scanning Systems, Inc. Image reader with multi-focus lens
US5608201A (en) 1995-01-04 1997-03-04 Psc Inc. Method and apparatus for detecting edges in a signal obtained from a bar code scanned in the Fresnel zone
US5949054A (en) 1995-10-23 1999-09-07 Welch Allyn, Inc. Bar code reader for reading high to low contrast bar code symbols
US6073849A (en) * 1996-11-01 2000-06-13 Psc Scanning, Inc. Electronic edge detection system using a second derivative signal processor
US5864129A (en) * 1997-05-05 1999-01-26 Psc Inc. Bar code digitizer including a voltage comparator
US6000616A (en) * 1997-05-12 1999-12-14 Webscan, Inc. Methods to determine and selectively sample positive and negative peak values occurring within a scan reflectance profile signal

Also Published As

Publication number Publication date
JP2001357348A (ja) 2001-12-26
EP1150241A3 (de) 2002-04-10
US6502751B1 (en) 2003-01-07
EP1150241A2 (de) 2001-10-31
EP1150241B1 (de) 2009-07-08

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Legal Events

Date Code Title Description
8320 Willingness to grant licences declared (paragraph 23)
8364 No opposition during term of opposition