HK1043006B - 圖像讀取裝置及用於執行白陰影校正的方法 - Google Patents

圖像讀取裝置及用於執行白陰影校正的方法

Info

Publication number
HK1043006B
HK1043006B HK02102669.4A HK02102669A HK1043006B HK 1043006 B HK1043006 B HK 1043006B HK 02102669 A HK02102669 A HK 02102669A HK 1043006 B HK1043006 B HK 1043006B
Authority
HK
Hong Kong
Prior art keywords
white
image
reading device
shading correction
shading
Prior art date
Application number
HK02102669.4A
Other languages
English (en)
Other versions
HK1043006A1 (en
Inventor
Yoshikazu Inoue
Wataru Nara
Yasuyuki Nomizu
Hiroyuki Kawamoto
Hiroshi Fukano
Motoya Sano
Hiroshi Kubo
Hitoshi Hattori
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
Publication of HK1043006A1 publication Critical patent/HK1043006A1/xx
Publication of HK1043006B publication Critical patent/HK1043006B/zh

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)
  • Image Input (AREA)
  • Optical Systems Of Projection Type Copiers (AREA)
HK02102669.4A 2000-09-01 2002-04-10 圖像讀取裝置及用於執行白陰影校正的方法 HK1043006B (zh)

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 (2)

Publication Number Publication Date
HK1043006A1 HK1043006A1 (en) 2002-08-30
HK1043006B true HK1043006B (zh) 2011-08-26

Family

ID=26599123

Family Applications (1)

Application Number Title Priority Date Filing Date
HK02102669.4A HK1043006B (zh) 2000-09-01 2002-04-10 圖像讀取裝置及用於執行白陰影校正的方法

Country Status (5)

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

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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
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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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Also Published As

Publication number Publication date
HK1043006A1 (en) 2002-08-30
DE60144041D1 (de) 2011-03-31
EP1187458A3 (en) 2004-08-11
EP1187458A2 (en) 2002-03-13
US20020054374A1 (en) 2002-05-09
EP1187458B1 (en) 2011-02-16
JP2002152510A (ja) 2002-05-24
JP4148655B2 (ja) 2008-09-10
US6891648B2 (en) 2005-05-10

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Effective date: 20210829