DE69318885T2 - Automatische Verschiebung und Verstärkungssteuerung für einen Dokumentenabtaster - Google Patents

Automatische Verschiebung und Verstärkungssteuerung für einen Dokumentenabtaster

Info

Publication number
DE69318885T2
DE69318885T2 DE69318885T DE69318885T DE69318885T2 DE 69318885 T2 DE69318885 T2 DE 69318885T2 DE 69318885 T DE69318885 T DE 69318885T DE 69318885 T DE69318885 T DE 69318885T DE 69318885 T2 DE69318885 T2 DE 69318885T2
Authority
DE
Germany
Prior art keywords
gain control
automatic shift
document scanner
scanner
document
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
DE69318885T
Other languages
English (en)
Other versions
DE69318885D1 (de
Inventor
Uffel Bruno Van
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.)
Agfa Gevaert NV
Original Assignee
Agfa Gevaert 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 Agfa Gevaert NV filed Critical Agfa Gevaert NV
Application granted granted Critical
Publication of DE69318885D1 publication Critical patent/DE69318885D1/de
Publication of DE69318885T2 publication Critical patent/DE69318885T2/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
    • H04N1/4076—Control or modification of tonal gradation or of extreme levels, e.g. background level dependent on references outside the picture
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
    • H04N25/60—Noise processing, e.g. detecting, correcting, reducing or removing noise
    • H04N25/67—Noise processing, e.g. detecting, correcting, reducing or removing noise applied to fixed-pattern noise, e.g. non-uniformity of response
    • H04N25/671—Noise processing, e.g. detecting, correcting, reducing or removing noise applied to fixed-pattern noise, e.g. non-uniformity of response for non-uniformity detection or correction

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Image Input (AREA)
DE69318885T 1992-05-04 1993-03-27 Automatische Verschiebung und Verstärkungssteuerung für einen Dokumentenabtaster Expired - Fee Related DE69318885T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP92201227 1992-05-04

Publications (2)

Publication Number Publication Date
DE69318885D1 DE69318885D1 (de) 1998-07-09
DE69318885T2 true DE69318885T2 (de) 1999-01-21

Family

ID=8210584

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69318885T Expired - Fee Related DE69318885T2 (de) 1992-05-04 1993-03-27 Automatische Verschiebung und Verstärkungssteuerung für einen Dokumentenabtaster

Country Status (3)

Country Link
US (1) US5331428A (de)
JP (1) JPH07274000A (de)
DE (1) DE69318885T2 (de)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5625718A (en) * 1992-02-25 1997-04-29 Pfu Limited White level setting system for an image scanner
US5915049A (en) * 1992-02-25 1999-06-22 Pfu Limited Binarization system for an image scanner
US6233360B1 (en) * 1996-09-24 2001-05-15 Xerox Corporation Method and system for hybrid error diffusion processing of image information using adaptive white and black reference values
WO2000019711A1 (de) * 1998-09-30 2000-04-06 Infineon Technologies Ag Verfahren und vorrichtung zur belichtungsabhängigen rausch-korrektur bei zeilen- und spaltenadressierbaren bildsensoren
US6249358B1 (en) * 1998-12-23 2001-06-19 Eastman Kodak Company Method of scanning photographic film images using selectively determined system response gain calibration
JP4609682B2 (ja) * 2000-11-29 2011-01-12 ソニー株式会社 通信システム、情報処理方法
DE10132589B4 (de) 2001-07-05 2005-11-03 Koenig & Bauer Ag Verfahren zur qualitativen Beurteilung von Material
DE10208289C1 (de) * 2002-02-26 2003-02-27 Koenig & Bauer Ag Elektronischer Bildsensor und ein Verfahren zur Auswertung
DE10208285A1 (de) * 2002-02-26 2003-09-18 Koenig & Bauer Ag Verfahren zur Korrektur der Bilddaten eines Kamerasystems
KR100484163B1 (ko) * 2002-09-14 2005-04-19 삼성전자주식회사 디지털 화질 개선 방법 및 장치
TW200407030A (en) * 2002-10-30 2004-05-01 Umax Data Systems Inc Image compensation method
US7359090B2 (en) * 2003-12-22 2008-04-15 Lexmark International, Inc. Shading an optical sensing element such as in a scanner
US20060001921A1 (en) * 2004-06-30 2006-01-05 Bailey James R System and method for high-performance scanner calibration
US20060082839A1 (en) * 2004-10-15 2006-04-20 Xerox Corporation System for processing image signals from an image scanner having a platen and a document handler
US20060139708A1 (en) * 2004-12-23 2006-06-29 Destiny Technology Corporation Method for correcting the response of charge coupled device
JP2011123876A (ja) * 2009-11-12 2011-06-23 Semiconductor Energy Lab Co Ltd 半導体装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4216503A (en) * 1979-03-26 1980-08-05 Xerox Corporation Signal restoration and gain control for image viewing devices
JPH02230869A (ja) * 1989-03-03 1990-09-13 Ricoh Co Ltd ゲインコントロール回路

Also Published As

Publication number Publication date
JPH07274000A (ja) 1995-10-20
DE69318885D1 (de) 1998-07-09
US5331428A (en) 1994-07-19

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8320 Willingness to grant licences declared (paragraph 23)
8339 Ceased/non-payment of the annual fee