DE102004014156A1 - System und Verfahren zur automatischen Korrektur eines durch Umgebungslicht bewirkten Beleuchtungsrauschens - Google Patents

System und Verfahren zur automatischen Korrektur eines durch Umgebungslicht bewirkten Beleuchtungsrauschens Download PDF

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Publication number
DE102004014156A1
DE102004014156A1 DE102004014156A DE102004014156A DE102004014156A1 DE 102004014156 A1 DE102004014156 A1 DE 102004014156A1 DE 102004014156 A DE102004014156 A DE 102004014156A DE 102004014156 A DE102004014156 A DE 102004014156A DE 102004014156 A1 DE102004014156 A1 DE 102004014156A1
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DE
Germany
Prior art keywords
noise
automatic correction
illumination
digital image
ambient noise
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.)
Withdrawn
Application number
DE102004014156A
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English (en)
Inventor
Kurt E Spears
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.)
Hewlett Packard Development Co LP
Original Assignee
Hewlett Packard Development Co LP
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 Hewlett Packard Development Co LP filed Critical Hewlett Packard Development Co LP
Publication of DE102004014156A1 publication Critical patent/DE102004014156A1/de
Withdrawn legal-status Critical Current

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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
    • H04N1/401—Compensating positionally unequal response of the pick-up or reproducing head
    • 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
    • H04N1/00835—Detecting external or ambient light
    • 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
    • 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
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/10—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using flat picture-bearing surfaces
    • H04N1/1013—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using flat picture-bearing surfaces with sub-scanning by translatory movement of at least a part of the main-scanning components
    • H04N1/1017—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using flat picture-bearing surfaces with sub-scanning by translatory movement of at least a part of the main-scanning components the main-scanning components remaining positionally invariant with respect to one another in the sub-scanning direction

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Image Input (AREA)
  • Image Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)

Abstract

Gemäß einem Ausführungsbeispiel der vorliegenden Erfindung weist ein Verfahren zum Verbessern eines digitalen Bildes eines Objekts ein Erfassen des Vorhandenseins von Umgebungslicht und ein automatisches Korrigieren des digitalen Bildes, das durch eine Bilderfassungsvorrichtung abgetastet wurde, auf, um ein Beleuchtungsrauschen in dem digitalen Bild, das durch das Umgebungslicht bewirkt wird, auszugleichen.
DE102004014156A 2003-08-08 2004-03-23 System und Verfahren zur automatischen Korrektur eines durch Umgebungslicht bewirkten Beleuchtungsrauschens Withdrawn DE102004014156A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10/637,397 US20050029352A1 (en) 2003-08-08 2003-08-08 System and method for automatic correction of illumination noise caused by ambient light

Publications (1)

Publication Number Publication Date
DE102004014156A1 true DE102004014156A1 (de) 2005-03-10

Family

ID=32991199

Family Applications (1)

Application Number Title Priority Date Filing Date
DE102004014156A Withdrawn DE102004014156A1 (de) 2003-08-08 2004-03-23 System und Verfahren zur automatischen Korrektur eines durch Umgebungslicht bewirkten Beleuchtungsrauschens

Country Status (5)

Country Link
US (1) US20050029352A1 (de)
JP (1) JP2005065276A (de)
DE (1) DE102004014156A1 (de)
GB (1) GB2405045A (de)
TW (1) TW200516507A (de)

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JP4858407B2 (ja) * 2006-11-27 2012-01-18 ブラザー工業株式会社 画像読取装置
US7944592B2 (en) * 2006-12-18 2011-05-17 Hewlett-Packard Development Company, L.P. Image capture device
US8199370B2 (en) 2007-08-29 2012-06-12 Scientific Games International, Inc. Enhanced scanner design
JP5024268B2 (ja) * 2008-11-28 2012-09-12 ブラザー工業株式会社 画像読取装置
JP5134528B2 (ja) * 2008-12-25 2013-01-30 ブラザー工業株式会社 画像読取装置
JP5035638B2 (ja) * 2009-03-16 2012-09-26 ブラザー工業株式会社 画像読取装置
WO2011024974A1 (ja) 2009-08-27 2011-03-03 株式会社日本触媒 ポリアクリル酸（塩）系吸水性樹脂およびその製造方法
WO2011099586A1 (ja) 2010-02-10 2011-08-18 株式会社日本触媒 吸水性樹脂粉末の製造方法
EP2546286B1 (de) 2010-03-12 2019-09-25 Nippon Shokubai Co., Ltd. Verfahren zur herstellung eines wasserabsorbierenden kunstharzes
EP2661872A4 (de) * 2011-01-04 2015-11-25 Piqx Imaging Pte Ltd Abtastverfahren und -vorrichtung
JP2014060631A (ja) * 2012-09-18 2014-04-03 Ricoh Co Ltd 画像読取装置、画像形成装置及び黒レベル補正方法
JP6131634B2 (ja) * 2013-01-16 2017-05-24 日本電気株式会社 画像入力装置、及び画像入力方法
US9641699B2 (en) 2013-01-29 2017-05-02 Hewlett-Packard Development Company, L. P. Calibration of scanning devices
CN108141504B (zh) * 2015-10-02 2019-11-26 惠普发展公司，有限责任合伙企业 光响应非均匀性抑制
US10582077B2 (en) * 2016-11-07 2020-03-03 Canon Finetech Nisca, Inc. Reading apparatus, determination method, and storage medium storing program
FR3109048B1 (fr) * 2020-04-06 2022-04-15 Idemia Identity & Security France procédé et dispositif d’imagerie de documents

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Also Published As

Publication number Publication date
US20050029352A1 (en) 2005-02-10
JP2005065276A (ja) 2005-03-10
GB0417286D0 (en) 2004-09-08
GB2405045A (en) 2005-02-16
TW200516507A (en) 2005-05-16

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