DE69627424T2 - Bildverarbeitungsverfahren und Gerät - Google Patents

Bildverarbeitungsverfahren und Gerät

Info

Publication number
DE69627424T2
DE69627424T2 DE69627424T DE69627424T DE69627424T2 DE 69627424 T2 DE69627424 T2 DE 69627424T2 DE 69627424 T DE69627424 T DE 69627424T DE 69627424 T DE69627424 T DE 69627424T DE 69627424 T2 DE69627424 T2 DE 69627424T2
Authority
DE
Germany
Prior art keywords
image processing
processing method
image
processing
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
DE69627424T
Other languages
English (en)
Other versions
DE69627424D1 (de
Inventor
Hiroaki Ikeda
Toru Niki
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 Inc
Original Assignee
Canon 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 Canon Inc filed Critical Canon Inc
Application granted granted Critical
Publication of DE69627424D1 publication Critical patent/DE69627424D1/de
Publication of DE69627424T2 publication Critical patent/DE69627424T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T3/00—Geometric image transformations in the plane of the image
    • G06T3/60—Rotation of whole images or parts thereof
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V30/00—Character recognition; Recognising digital ink; Document-oriented image-based pattern recognition
    • G06V30/10—Character recognition
    • G06V30/14—Image acquisition
    • G06V30/146—Aligning or centring of the image pick-up or image-field
    • G06V30/1475—Inclination or skew detection or correction of characters or of image to be recognised
    • G06V30/1478—Inclination or skew detection or correction of characters or of image to be recognised of characters or characters lines
    • 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
    • H04N1/00681—Detecting the presence, position or size of a sheet or correcting its position before scanning
    • 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
    • H04N1/00681—Detecting the presence, position or size of a sheet or correcting its position before scanning
    • H04N1/00684—Object of the detection
    • H04N1/00702—Position
    • H04N1/00705—Position at a plurality of spaced apart locations, e.g. as a sheet is fed through the apparatus
    • 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
    • H04N1/00681—Detecting the presence, position or size of a sheet or correcting its position before scanning
    • H04N1/00684—Object of the detection
    • H04N1/00718—Skew
    • 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
    • H04N1/00681—Detecting the presence, position or size of a sheet or correcting its position before scanning
    • H04N1/00763—Action taken as a result of detection
    • H04N1/00769—Comparing, e.g. with threshold
    • 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
    • H04N1/047—Detection, control or error compensation of scanning velocity or position
    • 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
    • H04N1/387—Composing, repositioning or otherwise geometrically modifying originals
    • H04N1/3877—Image rotation
    • H04N1/3878—Skew detection or correction
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V30/00—Character recognition; Recognising digital ink; Document-oriented image-based pattern recognition
    • G06V30/10—Character recognition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/024—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof deleted
    • H04N2201/02406—Arrangements for positioning elements within a head
    • H04N2201/02425—Self-adjusting arrangements, e.g. compensating for temperature fluctuations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/024—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof deleted
    • H04N2201/028—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof deleted for picture information pick-up
    • H04N2201/03—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof deleted for picture information pick-up deleted
    • H04N2201/031—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof deleted for picture information pick-up deleted deleted
    • H04N2201/03104—Integral pick-up heads, i.e. self-contained heads whose basic elements are a light source, a lens and a photodetector supported by a single-piece frame
    • H04N2201/0315—Details of integral heads not otherwise provided for
    • H04N2201/03162—Original guide plate
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/04—Scanning arrangements
    • H04N2201/047—Detection, control or error compensation of scanning velocity or position
    • H04N2201/04701—Detection of scanning velocity or position
    • H04N2201/04703—Detection of scanning velocity or position using the scanning elements as detectors, e.g. by performing a prescan
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/04—Scanning arrangements
    • H04N2201/047—Detection, control or error compensation of scanning velocity or position
    • H04N2201/04701—Detection of scanning velocity or position
    • H04N2201/04729—Detection of scanning velocity or position in the main-scan direction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/04—Scanning arrangements
    • H04N2201/047—Detection, control or error compensation of scanning velocity or position
    • H04N2201/04701—Detection of scanning velocity or position
    • H04N2201/04731—Detection of scanning velocity or position in the sub-scan direction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/04—Scanning arrangements
    • H04N2201/047—Detection, control or error compensation of scanning velocity or position
    • H04N2201/04701—Detection of scanning velocity or position
    • H04N2201/04743—Detection of scanning velocity or position by detecting the image directly
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/04—Scanning arrangements
    • H04N2201/047—Detection, control or error compensation of scanning velocity or position
    • H04N2201/04753—Control or error compensation of scanning position or velocity
    • H04N2201/04758—Control or error compensation of scanning position or velocity by controlling the position of the scanned image area
    • H04N2201/04787—Control or error compensation of scanning position or velocity by controlling the position of the scanned image area by changing or controlling the addresses or values of pixels, e.g. in an array, in a memory, by interpolation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/04—Scanning arrangements
    • H04N2201/047—Detection, control or error compensation of scanning velocity or position
    • H04N2201/04753—Control or error compensation of scanning position or velocity
    • H04N2201/04789—Control or error compensation of scanning position or velocity in the main-scan direction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/04—Scanning arrangements
    • H04N2201/047—Detection, control or error compensation of scanning velocity or position
    • H04N2201/04753—Control or error compensation of scanning position or velocity
    • H04N2201/04791—Control or error compensation of scanning position or velocity in the sub-scan direction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/04—Scanning arrangements
    • H04N2201/047—Detection, control or error compensation of scanning velocity or position
    • H04N2201/04753—Control or error compensation of scanning position or velocity
    • H04N2201/04793—Control or error compensation of scanning position or velocity using stored control or compensation data, e.g. previously measured data

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Character Input (AREA)
  • Editing Of Facsimile Originals (AREA)
DE69627424T 1995-06-20 1996-06-19 Bildverarbeitungsverfahren und Gerät Expired - Lifetime DE69627424T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15331295A JP4114959B2 (ja) 1995-06-20 1995-06-20 画像処理方法及び装置

Publications (2)

Publication Number Publication Date
DE69627424D1 DE69627424D1 (de) 2003-05-22
DE69627424T2 true DE69627424T2 (de) 2003-12-24

Family

ID=15559744

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69627424T Expired - Lifetime DE69627424T2 (de) 1995-06-20 1996-06-19 Bildverarbeitungsverfahren und Gerät

Country Status (4)

Country Link
US (1) US6493470B1 (de)
EP (1) EP0750415B1 (de)
JP (1) JP4114959B2 (de)
DE (1) DE69627424T2 (de)

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* Cited by examiner, † Cited by third party
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EP1433306A1 (de) * 2001-09-07 2004-06-30 Koninklijke Philips Electronics N.V. Bildgerät mit kamera und bildperspektivenverbesserung und vielleicht auch dreh- und verschiebungskorrektur
JP2004046632A (ja) * 2002-07-12 2004-02-12 Minolta Co Ltd 画像処理装置
US20050157170A1 (en) * 2002-08-20 2005-07-21 Olympus Corporation Image comparison apparatus, image comparison method, and program to execute image comparison by computer
EP1549072A4 (de) * 2002-08-20 2006-12-06 Olympus Corp Bildvergleichseinrichtung, bildvergleichsverfahren und programm, das bewirkt, dass ein computer einen bildvergleich ausf hrt
JP4497974B2 (ja) * 2004-03-25 2010-07-07 キヤノン株式会社 画像処理装置、画像処理方法、プログラム及び記憶媒体
TWI238645B (en) * 2004-06-08 2005-08-21 Benq Corp Titled angle detection for document image deskew
JP4310288B2 (ja) * 2005-04-12 2009-08-05 キヤノン株式会社 画像処理装置及びその方法、プログラム並びに記憶媒体
JP4143655B2 (ja) 2005-11-24 2008-09-03 キヤノン株式会社 画像処理装置、画像処理方法、プログラム、記憶媒体、システム
US8150165B2 (en) * 2008-04-11 2012-04-03 Recognition Robotics, Inc. System and method for visual recognition
US9576217B2 (en) 2008-04-11 2017-02-21 Recognition Robotics System and method for visual recognition
US8125544B2 (en) * 2008-09-02 2012-02-28 Casio Computer Co., Ltd. Image processing apparatus for extracting quadrangle area in image
CN101923710A (zh) * 2010-06-30 2010-12-22 青岛海信网络科技股份有限公司 图像倾斜校正方法及装置
JP2015012304A (ja) * 2013-06-26 2015-01-19 ソニー株式会社 画像処理装置、画像処理方法、及び、プログラム
CN106447615A (zh) * 2016-08-02 2017-02-22 浪潮软件股份有限公司 一种扫描文档图像的倾斜校正方法
US10531845B2 (en) * 2017-09-29 2020-01-14 General Electric Company Systems and methods for image correction in an X-ray device
US10896012B2 (en) 2018-03-13 2021-01-19 Canon Kabushiki Kaisha Image processing apparatus, image processing method, and storage medium
JP7094733B2 (ja) * 2018-03-13 2022-07-04 キヤノン株式会社 画像処理装置、プログラム、画像処理方法

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JPS5214112B2 (de) * 1973-02-22 1977-04-19
US4251799A (en) * 1979-03-30 1981-02-17 International Business Machines Corporation Optical character recognition using baseline information
JPS5923467B2 (ja) * 1979-04-16 1984-06-02 株式会社日立製作所 位置検出方法
JPS5887652A (ja) * 1981-11-19 1983-05-25 Ricoh Co Ltd 画像処理装置
JP2531605B2 (ja) * 1984-02-24 1996-09-04 株式会社東芝 画像の位置合せ装置
US4876730A (en) * 1987-02-25 1989-10-24 Lundy Electronics & Systems, Inc. Optical character reader with skew recognition
JPS63268081A (ja) 1987-04-17 1988-11-04 インタ−ナショナル・ビジネス・マシ−ンズ・コ−ポレ−ション 文書の文字を認識する方法及び装置
US4985930A (en) * 1987-09-24 1991-01-15 Hitachi, Ltd. Image data filing system and image data correcting method
JPS6482286A (en) * 1987-09-25 1989-03-28 Toshiba Corp Image inclination detector
US5001766A (en) * 1988-05-16 1991-03-19 At&T Bell Laboratories Apparatus and method for skew control of document images
US5101448A (en) * 1988-08-24 1992-03-31 Hitachi, Ltd. Method and apparatus for processing a document by utilizing an image
DE68928895T2 (de) * 1988-10-11 1999-05-27 Oyo Keisoku Kenkyusho Kk Verfahren und Gerät für universelle adaptiv lernende Bildmessung und -erkennung
US5140650A (en) * 1989-02-02 1992-08-18 International Business Machines Corporation Computer-implemented method for automatic extraction of data from printed forms
JP2917155B2 (ja) 1989-12-18 1999-07-12 株式会社日立製作所 画像結合装置及び方法
DE4012608A1 (de) * 1990-04-20 1991-10-24 Roland Man Druckmasch Verfahren und vorrichtung zur bestimmung von passerdifferenzen an druckbildstellen eines mehrfarbenoffsetdruckes
JPH0488489A (ja) * 1990-08-01 1992-03-23 Internatl Business Mach Corp <Ibm> 一般化ハフ変換を用いた文字認識装置および方法
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JP3320759B2 (ja) * 1991-12-26 2002-09-03 株式会社東芝 文書画像傾き検出装置およびその方法
US5452374A (en) 1992-04-06 1995-09-19 Ricoh Corporation Skew detection and correction of a document image representation
US5625719A (en) * 1992-10-19 1997-04-29 Fast; Bruce B. OCR image preprocessing method for image enhancement of scanned documents
US5539532A (en) * 1993-08-12 1996-07-23 Nec Corporation Image reading apparatus with varied subscanning speed
JP3924796B2 (ja) * 1995-04-25 2007-06-06 株式会社デンソー パターン位置の計測方法および計測装置
JP3504054B2 (ja) * 1995-07-17 2004-03-08 株式会社東芝 文書処理装置および文書処理方法

Also Published As

Publication number Publication date
EP0750415A2 (de) 1996-12-27
EP0750415A3 (de) 1997-12-29
JP4114959B2 (ja) 2008-07-09
DE69627424D1 (de) 2003-05-22
US6493470B1 (en) 2002-12-10
JPH096914A (ja) 1997-01-10
EP0750415B1 (de) 2003-04-16

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