DE69322561D1 - Kalibrierter Farbabtaster - Google Patents

Kalibrierter Farbabtaster

Info

Publication number
DE69322561D1
DE69322561D1 DE69322561T DE69322561T DE69322561D1 DE 69322561 D1 DE69322561 D1 DE 69322561D1 DE 69322561 T DE69322561 T DE 69322561T DE 69322561 T DE69322561 T DE 69322561T DE 69322561 D1 DE69322561 D1 DE 69322561D1
Authority
DE
Germany
Prior art keywords
color scanner
calibrated color
calibrated
scanner
color
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
DE69322561T
Other languages
English (en)
Inventor
Richard F Lehman
Roger A Wendt
Calvin M Winey
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.)
Howtek Inc
Original Assignee
Howtek 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 Howtek Inc filed Critical Howtek Inc
Application granted granted Critical
Publication of DE69322561D1 publication Critical patent/DE69322561D1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H04N1/40056—Circuits for driving or energising particular reading heads or original illumination means
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Color Image Communication Systems (AREA)
  • Color Television Image Signal Generators (AREA)
  • Processing Of Color Television Signals (AREA)
DE69322561T 1992-08-28 1993-08-26 Kalibrierter Farbabtaster Expired - Lifetime DE69322561D1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/937,216 US5237172A (en) 1992-08-28 1992-08-28 Calibrated color scanner with reference level adjustment

Publications (1)

Publication Number Publication Date
DE69322561D1 true DE69322561D1 (de) 1999-01-28

Family

ID=25469633

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69322561T Expired - Lifetime DE69322561D1 (de) 1992-08-28 1993-08-26 Kalibrierter Farbabtaster

Country Status (4)

Country Link
US (2) US5424537A (de)
EP (1) EP0585124B1 (de)
JP (1) JPH06205166A (de)
DE (1) DE69322561D1 (de)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5915049A (en) * 1992-02-25 1999-06-22 Pfu Limited Binarization system for an image scanner
US5625718A (en) * 1992-02-25 1997-04-29 Pfu Limited White level setting system for an image scanner
US5386299A (en) * 1993-03-12 1995-01-31 Ncr Corporation Method and appartus for automatically calibrating cameras used for document scanning
EP0689341B1 (de) * 1994-05-24 2000-07-26 Pfu Limited Bildabtaster mit Systemerweiterungsfunktion
EP0707408A1 (de) * 1994-10-11 1996-04-17 International Business Machines Corporation Optisches Abtastgerät für durchsichtige Medien
US5781314A (en) * 1995-06-15 1998-07-14 Nikon Corporation Color image reading apparatus and method
EP0850535B1 (de) * 1995-09-14 1999-03-24 Heidelberger Druckmaschinen Aktiengesellschaft Verfahren zum weissabgleich
US5621217A (en) * 1995-09-28 1997-04-15 Xerox Corporation Apparatus and method for calibrating a digital scanner
JP3596789B2 (ja) * 1995-10-16 2004-12-02 富士写真フイルム株式会社 画像読取処理装置
KR100306419B1 (en) * 1997-11-29 2001-08-09 Samsung Electronics Co Ltd Method for correcting shading of shuttle scanner
DE19811279C2 (de) 1998-03-12 2001-12-06 Heidelberger Druckmasch Ag Verfahren zur automatischen Auswahl von Farbkalibrierungen
US6327047B1 (en) * 1999-01-22 2001-12-04 Electronics For Imaging, Inc. Automatic scanner calibration
US6075613A (en) * 1999-02-26 2000-06-13 General Scanning, Inc. Optical scanner calibration device
US6406849B1 (en) * 1999-10-29 2002-06-18 Agilent Technologies, Inc. Interrogating multi-featured arrays
JP2002077614A (ja) * 2000-08-25 2002-03-15 Seiko Epson Corp 黒基準データ算出方法および画像読み取り装置
FR2815502B1 (fr) * 2000-10-13 2002-12-13 Commissariat Energie Atomique Dispositif de detection d'un flux photonique a balayage autoadaptatif
JP4485087B2 (ja) * 2001-03-01 2010-06-16 株式会社半導体エネルギー研究所 半導体装置の動作方法
US7233418B2 (en) * 2001-05-15 2007-06-19 Hewlett-Packard Development Company, L.P. Calibration method for quick scanning starts
US6947187B2 (en) * 2001-05-24 2005-09-20 Hewlett-Packard Development Company, L.P. Apparatus and method for calibrating a scanner with a document feeder
US7433096B2 (en) * 2003-02-28 2008-10-07 Hewlett-Packard Development Company, L.P. Scanning device calibration system and method
US7433097B2 (en) * 2003-04-18 2008-10-07 Hewlett-Packard Development Company, L.P. Optical image scanner with moveable calibration target

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3619493A (en) * 1968-12-20 1971-11-09 Graphic Sciences Inc Automatic gain control for graphic data transmission system
US3914538A (en) * 1972-05-16 1975-10-21 Xerox Corp Facsimile communication system
JPS6153868A (ja) * 1984-08-24 1986-03-17 Dainippon Screen Mfg Co Ltd 画像走査信号処理におけるキャリブレーション装置
US4972273A (en) * 1984-10-15 1990-11-20 Burkhardt Norman S High speed, high resolution image processing system
US4694156A (en) * 1986-02-14 1987-09-15 Xerox Corporation Pixel placement sensing arrangement using split detecting elements
US5038225A (en) * 1986-04-04 1991-08-06 Canon Kabushiki Kaisha Image reading apparatus with black-level and/or white level correction
DE3778602D1 (de) * 1986-07-18 1992-06-04 Dainippon Screen Mfg Bild-datenverarbeitungsverfahren und anordnung dafuer.
US4803556A (en) * 1987-06-15 1989-02-07 Xerox Corporation Scan lamp intensity control for raster input scanners
US4982294A (en) * 1987-07-24 1991-01-01 Eastman Kodak Company Apparatus for enhancing and thresholding scanned microfilm images and methods for use therein
JPH01115266A (ja) * 1987-10-29 1989-05-08 Ricoh Co Ltd 原稿読取装置
US5267053A (en) * 1988-10-27 1993-11-30 Eastman Kodak Company Automatic reference control for image scanners
JPH02230869A (ja) * 1989-03-03 1990-09-13 Ricoh Co Ltd ゲインコントロール回路
JP2918041B2 (ja) * 1989-03-14 1999-07-12 株式会社リコー 画像読取り装置
JPH0335233A (ja) * 1989-06-30 1991-02-15 Toshiba Corp 画像形成装置
JP2512320Y2 (ja) * 1989-09-21 1996-10-02 大日本スクリーン製造株式会社 画像処理条件設定装置
US5105266A (en) * 1989-11-30 1992-04-14 Eastman Kodak Company Single pass color substitution
US5185673A (en) * 1991-06-12 1993-02-09 Hewlett-Packard Company Automated image calibration

Also Published As

Publication number Publication date
US5424537A (en) 1995-06-13
JPH06205166A (ja) 1994-07-22
EP0585124A1 (de) 1994-03-02
EP0585124B1 (de) 1998-12-16
US5237172A (en) 1993-08-17

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Legal Events

Date Code Title Description
8332 No legal effect for de