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DE60222722D1 - Verfahren und Vorrichtung zur Korrektur von perspektivischen Verzerrungen in Dokumentbildern und zur Summierung von Bildzeilen - Google Patents

Verfahren und Vorrichtung zur Korrektur von perspektivischen Verzerrungen in Dokumentbildern und zur Summierung von Bildzeilen

Info

Publication number
DE60222722D1
DE60222722D1 DE60222722T DE60222722T DE60222722D1 DE 60222722 D1 DE60222722 D1 DE 60222722D1 DE 60222722 T DE60222722 T DE 60222722T DE 60222722 T DE60222722 T DE 60222722T DE 60222722 D1 DE60222722 D1 DE 60222722D1
Authority
DE
Germany
Prior art keywords
image lines
document images
perspective distortions
correcting perspective
summing image
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
DE60222722T
Other languages
English (en)
Other versions
DE60222722T2 (de
Inventor
Christopher R Dance
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.)
Xerox Corp
Original Assignee
Xerox Corp
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 Xerox Corp filed Critical Xerox Corp
Publication of DE60222722D1 publication Critical patent/DE60222722D1/de
Application granted granted Critical
Publication of DE60222722T2 publication Critical patent/DE60222722T2/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
    • G06T5/00—Image enhancement or restoration
    • G06T5/80—Geometric correction
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V20/00—Scenes; Scene-specific elements
    • G06V20/60—Type of objects
    • G06V20/62—Text, e.g. of license plates, overlay texts or captions on TV images
    • 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
    • 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
    • G06V30/16—Image preprocessing
    • G06V30/166—Normalisation of pattern dimensions
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Multimedia (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Image Analysis (AREA)
  • Image Processing (AREA)
  • Character Input (AREA)
  • Editing Of Facsimile Originals (AREA)
DE60222722T 2001-07-09 2002-07-04 Verfahren und Vorrichtung zur Korrektur von perspektivischen Verzerrungen in Dokumentbildern und zur Summierung von Bildzeilen Expired - Lifetime DE60222722T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/901,508 US6873732B2 (en) 2001-07-09 2001-07-09 Method and apparatus for resolving perspective distortion in a document image and for calculating line sums in images
US901508 2001-07-09

Publications (2)

Publication Number Publication Date
DE60222722D1 true DE60222722D1 (de) 2007-11-15
DE60222722T2 DE60222722T2 (de) 2008-07-17

Family

ID=25414327

Family Applications (1)

Application Number Title Priority Date Filing Date
DE60222722T Expired - Lifetime DE60222722T2 (de) 2001-07-09 2002-07-04 Verfahren und Vorrichtung zur Korrektur von perspektivischen Verzerrungen in Dokumentbildern und zur Summierung von Bildzeilen

Country Status (5)

Country Link
US (1) US6873732B2 (de)
EP (1) EP1276074B1 (de)
JP (1) JP2003091721A (de)
BR (1) BR0202588A8 (de)
DE (1) DE60222722T2 (de)

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US9047540B2 (en) 2012-07-19 2015-06-02 Qualcomm Incorporated Trellis based word decoder with reverse pass
US9071785B2 (en) 2013-02-15 2015-06-30 Gradeable, Inc. Adjusting perspective distortion of an image
US10339406B2 (en) * 2013-03-15 2019-07-02 Orcam Technologies Ltd. Apparatus and method for using background change to determine context
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US9380286B2 (en) 2013-04-19 2016-06-28 Adobe Systems Incorporated Stereoscopic target region filling
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US8913836B1 (en) * 2013-12-20 2014-12-16 I.R.I.S. Method and system for correcting projective distortions using eigenpoints
US8897600B1 (en) * 2013-12-20 2014-11-25 I.R.I.S. Method and system for determining vanishing point candidates for projective correction
US8811751B1 (en) * 2013-12-20 2014-08-19 I.R.I.S. Method and system for correcting projective distortions with elimination steps on multiple levels
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CN104463126A (zh) * 2014-12-15 2015-03-25 湖南工业大学 一种扫描文档图像的倾斜角自动检测方法
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RU2621601C1 (ru) * 2016-06-27 2017-06-06 Общество с ограниченной ответственностью "Аби Девелопмент" Устранение искривлений изображения документа
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CN110414309A (zh) * 2019-05-27 2019-11-05 上海眼控科技股份有限公司 一种车辆铭牌的自动识别方法
JP7406884B2 (ja) * 2019-06-27 2023-12-28 キヤノン株式会社 情報処理装置、プログラム及び制御方法
CN112348025B (zh) * 2020-11-06 2023-04-07 上海商汤智能科技有限公司 字符检测方法及装置、电子设备和存储介质
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Also Published As

Publication number Publication date
EP1276074A2 (de) 2003-01-15
US6873732B2 (en) 2005-03-29
US20030026482A1 (en) 2003-02-06
JP2003091721A (ja) 2003-03-28
BR0202588A8 (pt) 2018-03-06
EP1276074B1 (de) 2007-10-03
EP1276074A3 (de) 2004-07-07
BR0202588A (pt) 2003-04-29
DE60222722T2 (de) 2008-07-17

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