IT8021997A0 - Apparecchiatura per determinare l'angolo ottimo di scansione per documenti stampati. - Google Patents

Apparecchiatura per determinare l'angolo ottimo di scansione per documenti stampati.

Info

Publication number
IT8021997A0
IT8021997A0 IT8021997A IT2199780A IT8021997A0 IT 8021997 A0 IT8021997 A0 IT 8021997A0 IT 8021997 A IT8021997 A IT 8021997A IT 2199780 A IT2199780 A IT 2199780A IT 8021997 A0 IT8021997 A0 IT 8021997A0
Authority
IT
Italy
Prior art keywords
determining
equipment
scanning angle
printed documents
optimal scanning
Prior art date
Application number
IT8021997A
Other languages
English (en)
Other versions
IT1148862B (it
Inventor
Pierre Chevillat
Hans Rudolf Schindler
Original Assignee
Ibm
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 Ibm filed Critical Ibm
Publication of IT8021997A0 publication Critical patent/IT8021997A0/it
Application granted granted Critical
Publication of IT1148862B publication Critical patent/IT1148862B/it

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
    • H04N1/00681—Detecting the presence, position or size of a sheet or correcting its position before scanning
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • H04N1/00684—Object of the detection
    • H04N1/00702—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
    • H04N1/00681—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
    • H04N1/00684—Object of the detection
    • H04N1/00721—Orientation
    • 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
    • H04N1/00785—Correcting the position of a sheet before scanning
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • H04N2201/04—Scanning arrangements
    • H04N2201/0402—Arrangements not specific to a particular one of the scanning methods covered by groups H04N1/04 - H04N1/207
    • H04N2201/0432—Adjusting the orientation of the scanning elements relative to the scanned sheet, e.g. changing from longitudinal to lateral scanning

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Facsimile Scanning Arrangements (AREA)
IT21997/80A 1979-06-26 1980-05-13 Apparecchiatura per determinare l'angolo otimo di scansione per documenti stampati IT1148862B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH593979 1979-06-26

Publications (2)

Publication Number Publication Date
IT8021997A0 true IT8021997A0 (it) 1980-05-13
IT1148862B IT1148862B (it) 1986-12-03

Family

ID=4301822

Family Applications (1)

Application Number Title Priority Date Filing Date
IT21997/80A IT1148862B (it) 1979-06-26 1980-05-13 Apparecchiatura per determinare l'angolo otimo di scansione per documenti stampati

Country Status (5)

Country Link
US (1) US4338588A (it)
EP (1) EP0020897B1 (it)
JP (1) JPS6014552B2 (it)
DE (1) DE3065583D1 (it)
IT (1) IT1148862B (it)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4558461A (en) * 1983-06-17 1985-12-10 Litton Systems, Inc. Text line bounding system
US4723297A (en) * 1984-09-27 1988-02-02 Siemens Aktiengesellschaft Method for automatic correction of character skew in the acquisition of a text original in the form of digital scan results
JPS61166685A (ja) * 1985-01-19 1986-07-28 Sanyo Electric Co Ltd 文字切出し方法
JPS61229174A (ja) * 1985-04-03 1986-10-13 Canon Inc 画像入力装置
JPS61262982A (ja) * 1985-05-17 1986-11-20 Casio Comput Co Ltd 画像情報認識装置
US4817169A (en) * 1987-04-14 1989-03-28 Nippon Sheet Glass Co., Ltd. Page segmentor
US4827529A (en) * 1987-04-14 1989-05-02 Nippon Sheet Glass Co., Ltd. Lines and characters separation apparatus
US5001766A (en) * 1988-05-16 1991-03-19 At&T Bell Laboratories Apparatus and method for skew control of document images
JP2596826B2 (ja) * 1989-04-26 1997-04-02 セイコープレシジョン株式会社 文字認識装置
US5187753A (en) * 1989-12-08 1993-02-16 Xerox Corporation Method and apparatus for identification and correction of document skew
US5245676A (en) * 1989-12-21 1993-09-14 Xerox Corporation Determination of image skew angle from data including data in compressed form
EP0472313B1 (en) * 1990-08-03 1998-11-11 Canon Kabushiki Kaisha Image processing method and apparatus therefor
US6373997B1 (en) 1991-07-30 2002-04-16 Xerox Corporation Coarse and fine skew measurement
DE4318526C2 (de) * 1992-06-10 1999-11-25 Canon Kk Bildeingabevorrichtung
US5517587A (en) * 1994-09-23 1996-05-14 International Business Machines Corporation Positioning method and apparatus for line scanned images
US5898791A (en) * 1997-08-26 1999-04-27 The United States Of America As Represented By The Secretary Of The Navy Spinning focal plane array camera particularly suited for real time pattern recognition
US6285802B1 (en) 1999-04-08 2001-09-04 Litton Systems, Inc. Rotational correction and duplicate image identification by fourier transform correlation
IT1316845B1 (it) * 1999-04-30 2003-05-12 Pleva Gmbh Procedimento e dispositivo per determinare l'allineamento diformazioni lineari in nastri a prevalente estensione superficiale,
US6993205B1 (en) 2000-04-12 2006-01-31 International Business Machines Corporation Automatic method of detection of incorrectly oriented text blocks using results from character recognition
JP3802372B2 (ja) * 2001-05-16 2006-07-26 株式会社エヌ・ティ・ティ・ドコモ 移動通信システム
US7133573B2 (en) * 2002-11-26 2006-11-07 Eastman Kodak Company Document skew accommodation
US9621761B1 (en) 2015-10-08 2017-04-11 International Business Machines Corporation Automatic correction of skewing of digital images

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3457422A (en) * 1967-02-21 1969-07-22 Ibm Optical system adapted for rotation of an image to be scanned with reference to a scanning path
US3617751A (en) * 1969-08-18 1971-11-02 Computervision Corp Method and apparatus for article positioning utilizing an incremental article drive system and null transit counter
NL7009520A (it) * 1970-06-27 1971-12-29
US3701098A (en) * 1971-06-15 1972-10-24 Scanner Device for machine reading of information without manipulation of the information carrier
JPS5121529B1 (it) * 1971-07-23 1976-07-03
US3774014A (en) * 1972-03-20 1973-11-20 Pitney Bowes Alpex Printed code scanning system
US3847346A (en) * 1972-08-30 1974-11-12 Scanner Data field recognition and reading method and system
US3820069A (en) * 1972-12-26 1974-06-25 Ibm Electro-optical read system
US3831146A (en) * 1973-03-19 1974-08-20 Ibm Optimum scan angle determining means
DE2443265A1 (de) * 1974-09-10 1976-03-18 Bbc Brown Boveri & Cie Opto-elektronisches verfahren zum erkennen und positionieren eines objektes
DE2443692C3 (de) * 1974-09-12 1978-06-15 Erwin Sick Gmbh Optik-Elektronik, 7808 Waldkirch Verfahren und Vorrichtung zur Messung des Steigungswinkels von mit einer Drehung versehenen Garnen
DE2636906C3 (de) * 1976-08-17 1983-12-29 Erwin Sick Gmbh Optik-Elektronik, 7808 Waldkirch Verfahren zur Erzeugung eines Schaltsignals beim Durchgang eines Kontrastsprunges und Schaltungsanordnung zur Ausführung des Verfahrens
US4105925A (en) * 1977-03-14 1978-08-08 General Motors Corporation Optical object locator
US4097750A (en) * 1977-03-18 1978-06-27 General Motors Corporation Method of orienting objects using optically smeared images
JPS54935A (en) * 1977-06-06 1979-01-06 Hitachi Ltd Pattern detector
GB1547119A (en) * 1977-12-09 1979-06-06 Ibm Image rotation apparatus
CH643959A5 (de) * 1978-04-14 1984-06-29 Siemens Ag Verfahren und vorrichtung zur automatischen lageerkennung von halbleiterchips.
US4201378A (en) * 1978-05-16 1980-05-06 Bell & Howell Company Skew detector
US4459021A (en) * 1978-11-03 1984-07-10 The Perkin-Elmer Corporation Memory registration system

Also Published As

Publication number Publication date
US4338588A (en) 1982-07-06
EP0020897A2 (de) 1981-01-07
EP0020897B1 (de) 1983-11-16
IT1148862B (it) 1986-12-03
EP0020897A3 (en) 1982-04-28
JPS6014552B2 (ja) 1985-04-13
DE3065583D1 (en) 1983-12-22
JPS566570A (en) 1981-01-23

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