DE69228921D1 - Verfahren und programmierbares Gerät zur Bestimmung des Hintergrundpegels eines Dokuments - Google Patents

Verfahren und programmierbares Gerät zur Bestimmung des Hintergrundpegels eines Dokuments

Info

Publication number
DE69228921D1
DE69228921D1 DE69228921T DE69228921T DE69228921D1 DE 69228921 D1 DE69228921 D1 DE 69228921D1 DE 69228921 T DE69228921 T DE 69228921T DE 69228921 T DE69228921 T DE 69228921T DE 69228921 D1 DE69228921 D1 DE 69228921D1
Authority
DE
Germany
Prior art keywords
document
determining
programmable device
background level
level
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 - Fee Related
Application number
DE69228921T
Other languages
English (en)
Other versions
DE69228921T2 (de
Inventor
Barbara L Farrell
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 DE69228921D1 publication Critical patent/DE69228921D1/de
Application granted granted Critical
Publication of DE69228921T2 publication Critical patent/DE69228921T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H04N1/407—Control or modification of tonal gradation or of extreme levels, e.g. background level
    • H04N1/4072—Control or modification of tonal gradation or of extreme levels, e.g. background level dependent on the contents of the original
DE69228921T 1991-12-23 1992-12-16 Verfahren und programmierbares Gerät zur Bestimmung des Hintergrundpegels eines Dokuments Expired - Fee Related DE69228921T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/811,853 US5282061A (en) 1991-12-23 1991-12-23 Programmable apparatus for determining document background level

Publications (2)

Publication Number Publication Date
DE69228921D1 true DE69228921D1 (de) 1999-05-20
DE69228921T2 DE69228921T2 (de) 1999-10-07

Family

ID=25207774

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69228921T Expired - Fee Related DE69228921T2 (de) 1991-12-23 1992-12-16 Verfahren und programmierbares Gerät zur Bestimmung des Hintergrundpegels eines Dokuments

Country Status (4)

Country Link
US (1) US5282061A (de)
EP (1) EP0549255B1 (de)
JP (1) JP3254272B2 (de)
DE (1) DE69228921T2 (de)

Families Citing this family (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5051295A (en) * 1987-08-10 1991-09-24 Idemitsu Petrochemical Company Limited Protective film for photo masks and lith films
US5537491A (en) * 1993-11-24 1996-07-16 Xerox Corporation Analyzing an image or other data to obtain a stable number of groups
US5850298A (en) * 1994-03-22 1998-12-15 Ricoh Company, Ltd. Image processing device eliminating background noise
US5796877A (en) * 1995-12-11 1998-08-18 Xerox Corporation Method and apparatus for automatically fitting an input image to the size of the output document
US5956468A (en) * 1996-07-12 1999-09-21 Seiko Epson Corporation Document segmentation system
US5936684A (en) * 1996-10-29 1999-08-10 Seiko Epson Corporation Image processing method and image processing apparatus
US6038340A (en) * 1996-11-08 2000-03-14 Seiko Epson Corporation System and method for detecting the black and white points of a color image
US5751848A (en) * 1996-11-21 1998-05-12 Xerox Corporation System and method for generating and utilizing histogram data from a scanned image
US5835628A (en) * 1996-11-21 1998-11-10 Xerox Corporation Method and system for generating histograms from a scanned image
US5848183A (en) * 1996-11-21 1998-12-08 Xerox Corporation System and method for generating and utilizing histogram data from a scanned image
US5881166A (en) * 1996-11-21 1999-03-09 Xerox Corporation Method and system for generating a histogram of a scanned image
JP3114668B2 (ja) * 1997-10-03 2000-12-04 日本電気株式会社 物体検出・背景除去方法、装置およびプログラムを記録した記録媒体
US6198835B1 (en) * 1998-01-08 2001-03-06 Xerox Corporation Image input device and method for providing scanning artifact detection
US6246781B1 (en) * 1998-01-08 2001-06-12 Xerox Corporation Image input device and method for providing scanning artifact detection
US6122393A (en) * 1998-01-08 2000-09-19 Xerox Corporation Image input device and method for providing scanning artifact detection
US6323957B1 (en) * 1998-06-01 2001-11-27 Xerox Corporation Background noise removal for a low-cost digital color copier
US6222642B1 (en) 1998-08-10 2001-04-24 Xerox Corporation System and method for eliminating background pixels from a scanned image
US7912295B1 (en) * 1999-09-28 2011-03-22 Transpacific Optics Llc Method for auto-cropping a scanned image
US6618171B1 (en) 2000-02-25 2003-09-09 Xerox Corporation Black point adjustment based on image background
DE10026700B4 (de) * 2000-05-30 2008-03-27 Transpacific Optics LLC, Wilmington Verfahren zum automatischen Zurichten eines abgetasteten Bildes
US6621599B1 (en) * 2000-06-14 2003-09-16 Xerox Corporation Auto-width detection using backing image
JP4085580B2 (ja) * 2001-02-20 2008-05-14 富士ゼロックス株式会社 画像処理装置
US7057767B2 (en) * 2001-03-06 2006-06-06 Hewlett-Packard Development Company, L.P. Automatic background removal method and system
US20050265600A1 (en) * 2004-06-01 2005-12-01 Xerox Corporation Systems and methods for adjusting pixel classification using background detection
US10514816B2 (en) 2004-12-01 2019-12-24 Uber Technologies, Inc. Enhanced user assistance
US9747579B2 (en) 2004-09-30 2017-08-29 The Invention Science Fund I, Llc Enhanced user assistance
US10445799B2 (en) 2004-09-30 2019-10-15 Uber Technologies, Inc. Supply-chain side assistance
US20130238991A1 (en) * 2004-10-27 2013-09-12 Searete Llc Enhanced Contextual User Assistance
US10687166B2 (en) 2004-09-30 2020-06-16 Uber Technologies, Inc. Obtaining user assistance
US7574038B1 (en) 2005-03-31 2009-08-11 Adobe Systems Incorporated Method and apparatus for determining the background of an image sequence
US7555172B2 (en) * 2005-10-31 2009-06-30 Xerox Corporation Dynamic range detection and adjustment
US8358976B2 (en) 2006-03-24 2013-01-22 The Invention Science Fund I, Llc Wireless device with an aggregate user interface for controlling other devices
TWI360353B (en) * 2008-06-11 2012-03-11 Vatics Inc Method for auto-white-balance control
US8111918B2 (en) * 2008-10-20 2012-02-07 Xerox Corporation Segmentation for three-layer mixed raster content images
US8432392B2 (en) * 2010-09-02 2013-04-30 Samsung Electronics Co., Ltd. Display system with image conversion mechanism and method of operation thereof
US9552559B2 (en) 2014-05-06 2017-01-24 Elwha Llc System and methods for verifying that one or more directives that direct transport of a second end user does not conflict with one or more obligations to transport a first end user
US9483744B2 (en) 2014-05-06 2016-11-01 Elwha Llc Real-time carpooling coordinating systems and methods
US10458801B2 (en) 2014-05-06 2019-10-29 Uber Technologies, Inc. Systems and methods for travel planning that calls for at least one transportation vehicle unit
US11100434B2 (en) 2014-05-06 2021-08-24 Uber Technologies, Inc. Real-time carpooling coordinating system and methods
US10652489B2 (en) 2016-03-14 2020-05-12 Insightness Ag Vision sensor, a method of vision sensing, and a depth sensor assembly

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4339745A (en) * 1980-05-14 1982-07-13 General Electric Company Optical character recognition
US4442544A (en) * 1981-07-09 1984-04-10 Xerox Corporation Adaptive thresholder
US4593325A (en) * 1984-08-20 1986-06-03 The Mead Corporation Adaptive threshold document duplication
US5065257A (en) * 1985-03-20 1991-11-12 Canon Kabushiki Kaisha Image processing apparatus with means for compensating for dust., etc., on an original
DE3623294A1 (de) * 1985-07-10 1987-02-05 Fuji Electric Co Ltd System zum binaeren codieren eines bildes
JPS6269384A (ja) * 1985-09-21 1987-03-30 Nachi Fujikoshi Corp 二値化レベル自動設定方法
FR2602387B1 (fr) * 1986-07-30 1988-10-21 Trt Telecom Radio Electr Procede d'extraction automatique d'un objet contraste dans une image numerique
US4827253A (en) * 1987-05-18 1989-05-02 Dubner Computer Systems, Inc. Video compositing using a software linear keyer
US4796219A (en) * 1987-06-01 1989-01-03 Motorola, Inc. Serial two's complement multiplier
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
US4811115A (en) * 1987-10-16 1989-03-07 Xerox Corporation Image processing apparatus using approximate auto correlation function to detect the frequency of half-tone image 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
JPH02196565A (ja) * 1989-01-25 1990-08-03 Eastman Kodatsuku Japan Kk 画像二値化方式

Also Published As

Publication number Publication date
EP0549255A2 (de) 1993-06-30
JP3254272B2 (ja) 2002-02-04
JPH05276365A (ja) 1993-10-22
US5282061A (en) 1994-01-25
EP0549255A3 (de) 1994-04-06
DE69228921T2 (de) 1999-10-07
EP0549255B1 (de) 1999-04-14

Similar Documents

Publication Publication Date Title
DE69228921D1 (de) Verfahren und programmierbares Gerät zur Bestimmung des Hintergrundpegels eines Dokuments
DE69329950D1 (de) Vorrichtung und verfahren zur bestimmung der kalziumkonzentration
DE69321238T2 (de) Verfahren und vorrichtung zur bestimmung eines rotor-verstellungs-parameters
DE69214229T2 (de) Verfahren und Vorrichtung zur Kontrastverbesserung von Bildern
DE59208480D1 (de) Verfahren und Vorrichtung zur Bestimmung der Absolut-Koordinaten eines Objektes
ATA47690A (de) Verfahren und vorrichtung zur bestimmung von gebrauchseigenschaften eines prothesenschaftes
DE69230022D1 (de) Verfahren und Vorrichtung zur Gewinnung von Objekttypen
DE59308438D1 (de) Verfahren und Vorrichtung zur Feststellung der Funktionsfähigkeit eines Hämo-Dialysators
DE69117095T2 (de) Strömungsmittelbetätigte Vorrichtung und Verfahren zur Stabilisierung
DE69331339D1 (de) Gerät und verfahren zur bestimmung der blutgerinnungszeit
DE59207521D1 (de) Verfahren und vorrichtung zur schaumerzeugung
DE69131595D1 (de) Verfahren und gerät zur dynamischen niveauregulierung
DE69230399D1 (de) Vorrichtung und verfahren zur unterdrückung des hörerseitigen echo
DE69207169D1 (de) Verfahren und vorrichtung zur rotationskalibrierung
DE69532014D1 (de) Vorrichtung und Methode zur Feststellung eines Punktes
DE69210342D1 (de) Verfahren und Gerät zur schnellen Bestimmung von Gewichten
DE69418507D1 (de) Gerät und Verfahren zur automatischen Bestimmung der Dichte eines Gegenstandes
DE69208314D1 (de) Verfahren und Vorrichtung zur Verbesserung des städtischen Wassers
DE69130674D1 (de) Verfahren und gerät zur gewebe-kräuselbestimmung
DE69332187D1 (de) Verfahren und vorrichtung zur bestimmung der optimalen plazierung eines druck-fühlers
DE69228959T2 (de) Verfahren und Einrichtung zur Bestimmung von Oberflächenrauhigkeit
DE69407086T2 (de) Verfahren und Vorrichtung zur Bestimmung des Volumens eines Balgreservoirs
ATA30290A (de) Verfahren und einrichtung zur signalauswertung
DE69207979D1 (de) Vorrichtung und Verfahren zur Feststellung der Anwesenheit und der Grösse einer Vorlage
DE69210788T2 (de) Gerät und Verfahren zur Toleranzbestimmung

Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee