DE60144041D1 - Bildlesevorrichtung und -Verfahren mit Weisschattierungskorrektur - Google Patents

Bildlesevorrichtung und -Verfahren mit Weisschattierungskorrektur

Info

Publication number
DE60144041D1
DE60144041D1 DE60144041T DE60144041T DE60144041D1 DE 60144041 D1 DE60144041 D1 DE 60144041D1 DE 60144041 T DE60144041 T DE 60144041T DE 60144041 T DE60144041 T DE 60144041T DE 60144041 D1 DE60144041 D1 DE 60144041D1
Authority
DE
Germany
Prior art keywords
image reading
reading device
shading correction
white shading
white
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
DE60144041T
Other languages
English (en)
Inventor
Yoshikazu Inoue
Wataru Nara
Yasuyuki Nomizu
Hiroyuki Kawamoto
Hiroshi Fukano
Motoya Sano
Hiroshi Kubo
Hitoshi Hattori
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.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Application granted granted Critical
Publication of DE60144041D1 publication Critical patent/DE60144041D1/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
    • H04N1/4076—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 Image Signal Circuits (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Optical Systems Of Projection Type Copiers (AREA)
  • Image Input (AREA)
DE60144041T 2000-09-01 2001-08-30 Bildlesevorrichtung und -Verfahren mit Weisschattierungskorrektur Expired - Lifetime DE60144041D1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2000266106 2000-09-01
JP2001075636A JP4148655B2 (ja) 2000-09-01 2001-03-16 画像読取装置、画像形成装置及び白基準データ作成方法

Publications (1)

Publication Number Publication Date
DE60144041D1 true DE60144041D1 (de) 2011-03-31

Family

ID=26599123

Family Applications (1)

Application Number Title Priority Date Filing Date
DE60144041T Expired - Lifetime DE60144041D1 (de) 2000-09-01 2001-08-30 Bildlesevorrichtung und -Verfahren mit Weisschattierungskorrektur

Country Status (5)

Country Link
US (1) US6891648B2 (de)
EP (1) EP1187458B1 (de)
JP (1) JP4148655B2 (de)
DE (1) DE60144041D1 (de)
HK (1) HK1043006B (de)

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US8737832B1 (en) 2006-02-10 2014-05-27 Nvidia Corporation Flicker band automated detection system and method
US8594441B1 (en) 2006-09-12 2013-11-26 Nvidia Corporation Compressing image-based data using luminance
US8723969B2 (en) * 2007-03-20 2014-05-13 Nvidia Corporation Compensating for undesirable camera shakes during video capture
US8724895B2 (en) * 2007-07-23 2014-05-13 Nvidia Corporation Techniques for reducing color artifacts in digital images
JP4968930B2 (ja) * 2007-08-03 2012-07-04 キヤノン株式会社 画像処理装置、画像補正方法、画像処理方法及びプログラム
US8570634B2 (en) * 2007-10-11 2013-10-29 Nvidia Corporation Image processing of an incoming light field using a spatial light modulator
US9177368B2 (en) * 2007-12-17 2015-11-03 Nvidia Corporation Image distortion correction
US8780128B2 (en) * 2007-12-17 2014-07-15 Nvidia Corporation Contiguously packed data
JP2009177310A (ja) * 2008-01-22 2009-08-06 Kyocera Mita Corp 画像読取装置及び画像形成装置
US8698908B2 (en) * 2008-02-11 2014-04-15 Nvidia Corporation Efficient method for reducing noise and blur in a composite still image from a rolling shutter camera
US9379156B2 (en) * 2008-04-10 2016-06-28 Nvidia Corporation Per-channel image intensity correction
JP2009272891A (ja) * 2008-05-07 2009-11-19 Ricoh Co Ltd 画像読取装置、画像形成装置、画像読取方法及び画像形成方法
US8311360B2 (en) * 2008-11-13 2012-11-13 Seiko Epson Corporation Shadow remover
US8373718B2 (en) * 2008-12-10 2013-02-12 Nvidia Corporation Method and system for color enhancement with color volume adjustment and variable shift along luminance axis
US8749662B2 (en) * 2009-04-16 2014-06-10 Nvidia Corporation System and method for lens shading image correction
US8698918B2 (en) * 2009-10-27 2014-04-15 Nvidia Corporation Automatic white balancing for photography
JP2011103575A (ja) * 2009-11-11 2011-05-26 Ricoh Co Ltd 画像読取装置および画像形成装置
JP5736682B2 (ja) * 2010-07-16 2015-06-17 株式会社リコー 画像読取装置、画像形成装置および画像データ補正方法
JP5652063B2 (ja) 2010-09-02 2015-01-14 株式会社リコー 画像読取装置、画像形成装置及びシェーディング補正方法
JP2012089922A (ja) 2010-10-15 2012-05-10 Canon Inc 画像読取装置
JP2012192628A (ja) * 2011-03-16 2012-10-11 Seiko Epson Corp 記録装置、記録システム、記録装置の制御方法、及び、プログラム
JP2013132042A (ja) 2011-11-25 2013-07-04 Ricoh Co Ltd 画像検査装置、画像形成装置、画像検査方法及びプログラム
US9798698B2 (en) 2012-08-13 2017-10-24 Nvidia Corporation System and method for multi-color dilu preconditioner
US9508318B2 (en) 2012-09-13 2016-11-29 Nvidia Corporation Dynamic color profile management for electronic devices
US9307213B2 (en) 2012-11-05 2016-04-05 Nvidia Corporation Robust selection and weighting for gray patch automatic white balancing
JP6040714B2 (ja) 2012-11-06 2016-12-07 株式会社リコー 自動原稿搬送装置、自動原稿搬送装置を備えた画像読取装置および画像形成装置
US9418400B2 (en) 2013-06-18 2016-08-16 Nvidia Corporation Method and system for rendering simulated depth-of-field visual effect
US9826208B2 (en) 2013-06-26 2017-11-21 Nvidia Corporation Method and system for generating weights for use in white balancing an image
US9756222B2 (en) 2013-06-26 2017-09-05 Nvidia Corporation Method and system for performing white balancing operations on captured images
JP6241094B2 (ja) * 2013-06-28 2017-12-06 株式会社リコー 画像読取装置、画像形成装置及び画像読取り方法
KR101920816B1 (ko) 2013-07-08 2018-11-21 한화테크윈 주식회사 쉐이딩 보정이 가능한 화이트 발란스 방법, 그리고 이에 적용되는 장치
JP6331805B2 (ja) * 2014-07-16 2018-05-30 富士ゼロックス株式会社 画像読取装置
JP2017079374A (ja) * 2015-10-19 2017-04-27 株式会社リコー 画像読取装置、画像形成装置、およびシェーディングデータ処理方法
US10091393B2 (en) * 2017-01-19 2018-10-02 Kabushiki Kaisha Toshiba Document conveying device, document reading apparatus, and document conveying method
JP7196644B2 (ja) 2019-01-30 2022-12-27 株式会社リコー 傾き検出装置、読取装置、画像処理装置および傾き検出方法
JP7131415B2 (ja) 2019-01-31 2022-09-06 株式会社リコー 傾き検出装置、読取装置、画像処理装置および傾き検出方法
JP7424076B2 (ja) 2020-01-29 2024-01-30 株式会社リコー 画像処理装置、画像処理システム、撮像装置、画像処理方法およびプログラム

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JP4536170B2 (ja) * 1996-12-27 2010-09-01 シャープ株式会社 撮像装置
JPH1175062A (ja) * 1997-06-30 1999-03-16 Ricoh Co Ltd 画像読取装置
JPH1170062A (ja) 1997-08-29 1999-03-16 Sanyo Electric Co Ltd 床用吸込具

Also Published As

Publication number Publication date
HK1043006A1 (en) 2002-08-30
HK1043006B (zh) 2011-08-26
JP2002152510A (ja) 2002-05-24
EP1187458A3 (de) 2004-08-11
US6891648B2 (en) 2005-05-10
US20020054374A1 (en) 2002-05-09
EP1187458A2 (de) 2002-03-13
JP4148655B2 (ja) 2008-09-10
EP1187458B1 (de) 2011-02-16

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