DE69824238D1 - Kopiergerät mit einstellbarer Gradation - Google Patents

Kopiergerät mit einstellbarer Gradation

Info

Publication number
DE69824238D1
DE69824238D1 DE69824238T DE69824238T DE69824238D1 DE 69824238 D1 DE69824238 D1 DE 69824238D1 DE 69824238 T DE69824238 T DE 69824238T DE 69824238 T DE69824238 T DE 69824238T DE 69824238 D1 DE69824238 D1 DE 69824238D1
Authority
DE
Germany
Prior art keywords
copier
gradation
adjustable
adjustable gradation
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
DE69824238T
Other languages
English (en)
Other versions
DE69824238T2 (de
Inventor
Jacobus Hubertus Marie Peulen
Petrus Antonius Ma Cornelissen
Strijp Romeo Maria Van
Cornelis Anna Wilhel Ophelders
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.)
Canon Production Printing Netherlands BV
Original Assignee
Oce Technologies BV
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 Oce Technologies BV filed Critical Oce Technologies BV
Application granted granted Critical
Publication of DE69824238D1 publication Critical patent/DE69824238D1/de
Publication of DE69824238T2 publication Critical patent/DE69824238T2/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
    • H04N1/407—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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Image Processing (AREA)
  • Color Image Communication Systems (AREA)
DE69824238T 1997-07-04 1998-03-09 Kopiergerät mit einstellbarer Gradation Expired - Lifetime DE69824238T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1006472A NL1006472C2 (nl) 1997-07-04 1997-07-04 Kopieerinrichting met instelbare gradatie.
NL1006472 1997-07-04

Publications (2)

Publication Number Publication Date
DE69824238D1 true DE69824238D1 (de) 2004-07-08
DE69824238T2 DE69824238T2 (de) 2005-06-23

Family

ID=19765273

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69824238T Expired - Lifetime DE69824238T2 (de) 1997-07-04 1998-03-09 Kopiergerät mit einstellbarer Gradation

Country Status (5)

Country Link
US (1) US6222640B1 (de)
EP (1) EP0889643B1 (de)
JP (1) JPH1188696A (de)
DE (1) DE69824238T2 (de)
NL (1) NL1006472C2 (de)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6760484B1 (en) 2000-01-26 2004-07-06 Hewlett-Packard Development Company, L.P. Method for improved contrast mapping of digital images
DE60116018T2 (de) * 2000-09-26 2006-08-03 Ricoh Co., Ltd. Bildabtastgerät, welches ein einwandfrei aussehendes Bild bereitstellt und zugleich die Bilddichte bewahrt
US7053939B2 (en) * 2001-10-17 2006-05-30 Hewlett-Packard Development Company, L.P. Automatic document detection method and system
JP3848877B2 (ja) * 2001-12-27 2006-11-22 三菱重工業株式会社 印刷機における色調制御方法とその装置
US7050650B2 (en) * 2002-02-28 2006-05-23 Hewlett-Packard Development Company, L.P. User selected background noise removal for scanned document images
GB2408872B (en) * 2003-12-01 2008-12-31 Inventec Appliances Corp Method and apparatus for transforming a high dynamic range image into a low dynamic range image
JP2005348237A (ja) * 2004-06-04 2005-12-15 Brother Ind Ltd 画像濃度調整装置及びこの装置を備えた画像読取装置
US20060082832A1 (en) * 2004-10-20 2006-04-20 Kabushiki Kaisha Toshiba Image processing device and image processing program
US8000554B2 (en) * 2007-04-04 2011-08-16 Xerox Corporation Automatic dynamic range adjustment in digital imaging

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5838455A (en) * 1919-05-11 1998-11-17 Minolta Co., Ltd. Image processor with image data compression capability
GB1236377A (en) * 1967-09-04 1971-06-23 Crosfield Electronics Ltd Improvements relating to non-linear function generators
US3893166A (en) * 1972-01-05 1975-07-01 Crosfield Electronics Ltd Colour correcting image reproducing methods and apparatus
JPS56102853A (en) * 1980-01-21 1981-08-17 Dainippon Screen Mfg Co Ltd Metho for pretreating image signal of image copying apparatus
JP2505889B2 (ja) * 1989-08-31 1996-06-12 キヤノン株式会社 画像処理装置
US5046118A (en) * 1990-02-06 1991-09-03 Eastman Kodak Company Tone-scale generation method and apparatus for digital x-ray images
US6885752B1 (en) 1994-07-08 2005-04-26 Brigham Young University Hearing aid device incorporating signal processing techniques
JP3489200B2 (ja) * 1994-07-26 2004-01-19 ソニー株式会社 カラープリンタにおける色補正方法
NL9402088A (nl) * 1994-12-09 1996-07-01 Oce Nederland Bv Afdruk-inrichting voor het uitvoeren van afdruk-opdrachten.
US5867169A (en) * 1996-04-17 1999-02-02 Pixar Method and apparatus for manipulating color values in a computer graphics system

Also Published As

Publication number Publication date
EP0889643A1 (de) 1999-01-07
EP0889643B1 (de) 2004-06-02
US6222640B1 (en) 2001-04-24
JPH1188696A (ja) 1999-03-30
DE69824238T2 (de) 2005-06-23
NL1006472C2 (nl) 1999-01-05

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition