JPH0357674B2 - - Google Patents

Info

Publication number
JPH0357674B2
JPH0357674B2 JP58197479A JP19747983A JPH0357674B2 JP H0357674 B2 JPH0357674 B2 JP H0357674B2 JP 58197479 A JP58197479 A JP 58197479A JP 19747983 A JP19747983 A JP 19747983A JP H0357674 B2 JPH0357674 B2 JP H0357674B2
Authority
JP
Japan
Prior art keywords
parameter
black
white
signal
image signal
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
JP58197479A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5995779A (ja
Inventor
Chaaruzu Sutotsufueru Jeimuzu
Ratsuseru Shingu Tsuu
Chando Tandon Jagudeitsushu
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.)
Xerox Corp
Original Assignee
Xerox Corp
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 Xerox Corp filed Critical Xerox Corp
Publication of JPS5995779A publication Critical patent/JPS5995779A/ja
Publication of JPH0357674B2 publication Critical patent/JPH0357674B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/40—Picture signal circuits
    • H04N1/403—Discrimination between the two tones in the picture signal of a two-tone original
    • 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
    • G06V10/28—Quantising the image, e.g. histogram thresholding for discrimination between background and foreground patterns

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Facsimile Image Signal Circuits (AREA)
JP58197479A 1982-10-28 1983-10-21 画像絵素の適応スレシヨルド装置及び適応的スレシヨルド方法 Granted JPS5995779A (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US437974 1982-10-28
US06/437,974 US4468704A (en) 1982-10-28 1982-10-28 Adaptive thresholder

Publications (2)

Publication Number Publication Date
JPS5995779A JPS5995779A (ja) 1984-06-01
JPH0357674B2 true JPH0357674B2 (en:Method) 1991-09-02

Family

ID=23738708

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58197479A Granted JPS5995779A (ja) 1982-10-28 1983-10-21 画像絵素の適応スレシヨルド装置及び適応的スレシヨルド方法

Country Status (2)

Country Link
US (1) US4468704A (en:Method)
JP (1) JPS5995779A (en:Method)

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FR2528198B1 (fr) * 1982-06-04 1987-08-07 Centre Nat Rech Scient Systeme de saisie de donnees inscrites sur un support
AU565874B2 (en) * 1983-03-11 1987-10-01 Ei Solutions, Inc. Adaptive threshold circuit for digital image processing
US4827531A (en) * 1983-04-11 1989-05-02 Magnetic Peripherals Inc. Method and device for reading a document character
DE3322705A1 (de) * 1983-06-24 1985-01-10 Fa. Carl Zeiss, 7920 Heidenheim Verfahren und schaltungsanordnung zur videoschnellen bestimmung des medianwertes eines auswertefensters
US4674126A (en) * 1983-09-12 1987-06-16 Canon Kabushiki Kaisha Image signal processing apparatus
JPS60124173A (ja) * 1983-12-09 1985-07-03 Canon Inc 画像処理装置
US4972501A (en) * 1984-03-01 1990-11-20 Canon Kabushiki Kaisha Image processing apparatus
US5020118A (en) * 1984-06-13 1991-05-28 Canon Kabushiki Kaisha Image reading apparatus
JPS6140684A (ja) * 1984-07-31 1986-02-26 Omron Tateisi Electronics Co 輪郭追跡装置
US4593325A (en) * 1984-08-20 1986-06-03 The Mead Corporation Adaptive threshold document duplication
US4644410A (en) * 1985-03-11 1987-02-17 R. A. McDonald Dynamic threshold binary generator
US4668995A (en) * 1985-04-12 1987-05-26 International Business Machines Corporation System for reproducing mixed images
US4760541A (en) * 1986-01-29 1988-07-26 General Electric Company Two dimensional digital spatial filter for enhancement of point sources
JPH0719275B2 (ja) * 1986-07-08 1995-03-06 住友電気工業株式会社 二値化回路
FR2604582B1 (fr) * 1986-09-30 1989-01-06 Bertin & Cie Procede pour transformer une image initiale de type video a multiples niveaux de gris en une image binaire
CA1297983C (en) * 1986-11-12 1992-03-24 Shigenobu Kasuya Binary signal producing apparatus for optical character recognition
US4845761A (en) * 1987-04-17 1989-07-04 Recognition Equipment Incorporated Letter mail address block locator system
JPH07105907B2 (ja) * 1987-05-25 1995-11-13 富士写真フイルム株式会社 画像信号処理装置及びその処理方法
US4982294A (en) * 1987-07-24 1991-01-01 Eastman Kodak Company Apparatus for enhancing and thresholding scanned microfilm images and methods for use therein
US4853795A (en) * 1987-07-24 1989-08-01 Eastman Kodak Company Forward look ahead techniques for tracking background and noise levels in scanned video images
US4868670A (en) * 1987-07-24 1989-09-19 Eastman Kodak Company Apparatus and method for improving the compressibility of an enhanced image through use of a momentarily varying threshold level
US4949389A (en) * 1987-10-09 1990-08-14 The United States Of America As Represented By The United States Department Of Energy Optical ranked-order filtering using threshold decomposition
US4910694A (en) * 1988-01-11 1990-03-20 Eastman Kodak Co Method for approximating a value which is a nonlinear function of the linear average of pixel data
IT1219119B (it) * 1988-03-18 1990-05-03 Olivetti & Co Spa Circuito di regolazione automatica della soglia di un segnale di lettura per un dispositivo di scansione digitale di immagini
SE464210B (sv) * 1988-06-22 1991-03-18 Esselte Security Syst Ab Foerfarande och anordning foer markeringsdetektering
EP0360920B1 (de) * 1988-09-30 1994-09-21 Computer Gesellschaft Konstanz Mbh Schaltungsanordnung zur Weisswertgewinnung für die Schwarz/Weiss-Quantisierung der Abtastsignale einzelner Fotosensoren
US4918543A (en) * 1989-01-24 1990-04-17 Eastman Kodak Company Apparatus for thresholding an image signal
US4912569A (en) * 1989-01-24 1990-03-27 Eastman Kodak Company Method for thresholding an image signal
US5121446A (en) * 1989-02-10 1992-06-09 Canon Kabushiki Kaisha Image processing apparatus capable of obtaining multi-level data
US5054101A (en) * 1989-02-28 1991-10-01 E. I. Du Pont De Nemours And Company Thresholding of gray level images using fractal dimensions
US4908875A (en) * 1989-03-21 1990-03-13 Hughes Aircraft Company Adaptive thresholding technique
US5153925A (en) * 1989-04-27 1992-10-06 Canon Kabushiki Kaisha Image processing apparatus
US5060284A (en) * 1990-03-23 1991-10-22 Eastman Kodak Company Adaptive error diffusion thresholding for document images
US5268773A (en) * 1990-03-30 1993-12-07 Samsung Electronics Co., Ltd. Document image signal processor having an adaptive threshold
DE69129675T2 (de) * 1990-04-25 1999-01-07 Canon K.K., Tokio/Tokyo Bildverarbeitungsvorrichtung
US5337162A (en) * 1991-06-30 1994-08-09 Ricoh Company, Ltd. Image processing apparatus for preventing occurrence of moire in output image
US5377282A (en) * 1991-09-19 1994-12-27 International Business Machines Corporation Optical inspection system utilizing dynamic analog-to-digital thresholding
US5337373A (en) * 1991-10-24 1994-08-09 International Business Machines Corporation Automatic threshold generation technique
JPH05244419A (ja) * 1991-11-25 1993-09-21 Eastman Kodak Co ２階調適応閾値を決定するシステムおよび方法
JP3044501B2 (ja) * 1991-11-29 2000-05-22 松下電器産業株式会社 映像信号処理方法および装置
US8352400B2 (en) 1991-12-23 2013-01-08 Hoffberg Steven M Adaptive pattern recognition based controller apparatus and method and human-factored interface therefore
US10361802B1 (en) 1999-02-01 2019-07-23 Blanding Hovenweep, Llc Adaptive pattern recognition based control system and method
AU6167694A (en) * 1993-01-27 1994-08-15 United Parcel Service Of America, Inc. Method and apparatus for thresholding images
GB9308952D0 (en) * 1993-04-30 1993-06-16 Philips Electronics Uk Ltd Tracking objects in video sequences
US5617489A (en) * 1993-08-04 1997-04-01 Richard S. Adachi Optical adaptive thresholder for converting analog signals to binary signals
US5608814A (en) * 1993-08-26 1997-03-04 General Electric Company Method of dynamic thresholding for flaw detection in ultrasonic C-scan images
US5583659A (en) * 1994-11-10 1996-12-10 Eastman Kodak Company Multi-windowing technique for thresholding an image using local image properties
US5969325A (en) 1996-06-03 1999-10-19 Accu-Sort Systems, Inc. High speed image acquisition system and method of processing and decoding barcode symbol
US5861616A (en) * 1996-10-01 1999-01-19 Mustek Systems, Inc. Method and device for recognizing a waveform of an analog signal
US6044179A (en) * 1997-11-26 2000-03-28 Eastman Kodak Company Document image thresholding using foreground and background clustering
US6360009B2 (en) * 1998-09-23 2002-03-19 Xerox Corporation Image segmentation apparatus and method
US8364136B2 (en) 1999-02-01 2013-01-29 Steven M Hoffberg Mobile system, a method of operating mobile system and a non-transitory computer readable medium for a programmable control of a mobile system
US7904187B2 (en) 1999-02-01 2011-03-08 Hoffberg Steven M Internet appliance system and method
US6774942B1 (en) * 2000-08-17 2004-08-10 Exar Corporation Black level offset calibration system for CCD image digitizer
US6879721B2 (en) 2001-01-02 2005-04-12 Hewlett-Packard Development Company, L.P. Pixel processing system for image production
US6842541B2 (en) * 2001-10-31 2005-01-11 Xerox Corporation Adaptive color super resolution thresholding
KR100790982B1 (ko) * 2006-02-14 2008-01-03 삼성전자주식회사 옵티컬 블랙 화소들의 리셋 신호 레벨들의 평균값을이용하여 활성 화소의 리셋 신호 레벨을 보정하는 이미지센서 및 이미지 센서의 활성 화소의 리셋 신호 레벨보정방법
US20070253040A1 (en) * 2006-04-28 2007-11-01 Eastman Kodak Company Color scanning to enhance bitonal image
US7995829B2 (en) * 2007-08-01 2011-08-09 General Electric Company Method and apparatus for inspecting components
US8254694B2 (en) * 2009-06-08 2012-08-28 Xerox Corporation Thin line detection in scanned image data
US9369742B2 (en) 2012-12-06 2016-06-14 Avaya Inc. System and method to estimate end-to-end video frame delays
EP3312761B1 (de) * 2016-10-18 2020-07-15 Leuze electronic GmbH + Co. KG Verfahren zur erfassung von barcodes mittels eines codelesers
JP2020065193A (ja) * 2018-10-18 2020-04-23 シャープ株式会社 画像形成装置、画像処理方法及び画像処理プログラム

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US3599148A (en) * 1969-04-22 1971-08-10 Burroughs Corp Quantizing circuit correction for character recognition systems
US3675201A (en) * 1970-02-24 1972-07-04 Burroughs Corp Threshold voltage determination system
US4345314A (en) * 1980-11-19 1982-08-17 International Business Machines Corporation Dynamic threshold device

Also Published As

Publication number Publication date
US4468704A (en) 1984-08-28
JPS5995779A (ja) 1984-06-01

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