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DE3776078D1 - Verfahren zur umwandlung eines originalen videobildes mit vielen graupegeln in ein binaeres bild. - Google Patents

Verfahren zur umwandlung eines originalen videobildes mit vielen graupegeln in ein binaeres bild.

Info

Publication number
DE3776078D1
DE3776078D1 DE8787402159T DE3776078T DE3776078D1 DE 3776078 D1 DE3776078 D1 DE 3776078D1 DE 8787402159 T DE8787402159 T DE 8787402159T DE 3776078 T DE3776078 T DE 3776078T DE 3776078 D1 DE3776078 D1 DE 3776078D1
Authority
DE
Germany
Prior art keywords
histogram
image
pct
pixel
threshold
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
DE8787402159T
Other languages
English (en)
Inventor
Michel Gustave Jules Fardeau
Bruno Jean Marie Adamolle
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.)
Bertin Technologies SAS
Original Assignee
Bertin et Cie SA
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 Bertin et Cie SA filed Critical Bertin et Cie SA
Application granted granted Critical
Publication of DE3776078D1 publication Critical patent/DE3776078D1/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
    • 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
    • H04N1/403—Discrimination between the two tones in the picture signal of a two-tone original

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Image Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Character Input (AREA)
  • Image Input (AREA)
  • Image Analysis (AREA)
DE8787402159T 1986-09-30 1987-09-28 Verfahren zur umwandlung eines originalen videobildes mit vielen graupegeln in ein binaeres bild. Expired - Lifetime DE3776078D1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8613577A FR2604582B1 (fr) 1986-09-30 1986-09-30 Procede pour transformer une image initiale de type video a multiples niveaux de gris en une image binaire

Publications (1)

Publication Number Publication Date
DE3776078D1 true DE3776078D1 (de) 1992-02-27

Family

ID=9339379

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8787402159T Expired - Lifetime DE3776078D1 (de) 1986-09-30 1987-09-28 Verfahren zur umwandlung eines originalen videobildes mit vielen graupegeln in ein binaeres bild.

Country Status (9)

Country Link
US (1) US4977605A (de)
EP (1) EP0266241B1 (de)
JP (1) JPH01502312A (de)
KR (1) KR960008379B1 (de)
AT (1) ATE71787T1 (de)
DE (1) DE3776078D1 (de)
ES (1) ES2028896T3 (de)
FR (1) FR2604582B1 (de)
WO (1) WO1988002587A1 (de)

Families Citing this family (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02253765A (ja) * 1989-03-28 1990-10-12 Toshiba Corp 画像処理装置
FR2646577B1 (fr) * 1989-04-27 1991-08-23 Bertin & Cie Procede et dispositif de transformation d'une image video en une image a plusieurs niveaux de gris
US5107422A (en) * 1989-10-02 1992-04-21 Kamentsky Louis A Method and apparatus for measuring multiple optical properties of biological specimens
US5201014A (en) * 1990-02-08 1993-04-06 Hewlett-Packard Company Method and apparatus for establishing threshold level in a binary mode document scanner
JP2768786B2 (ja) * 1990-02-20 1998-06-25 キヤノン株式会社 画像読み取り装置
EP0445450A1 (de) * 1990-03-07 1991-09-11 International Business Machines Corporation Bildverarbeitungsgerät, welches Bildelementintensitäten auf einem beschränkten Bereich Anzeigeintensitätswerte abbildet
JPH041866A (ja) * 1990-04-18 1992-01-07 Toyobo Co Ltd 画像処理方法およびその装置
JP2648400B2 (ja) * 1990-10-12 1997-08-27 三菱電機株式会社 画像処理装置
JP2750226B2 (ja) * 1991-02-19 1998-05-13 大日本スクリーン製造株式会社 二値化閾値の設定方法
US5179599A (en) * 1991-06-17 1993-01-12 Hewlett-Packard Company Dynamic thresholding system for documents using structural information of the documents
US5337373A (en) * 1991-10-24 1994-08-09 International Business Machines Corporation Automatic threshold generation technique
US5341224A (en) * 1992-04-17 1994-08-23 Xerox Corporation Image processing system and method for employing adaptive scanning of halftones to provide better printable images
US5335293A (en) * 1992-06-16 1994-08-02 Key Technology, Inc. Product inspection method and apparatus
US5546194A (en) * 1994-03-23 1996-08-13 Videofaxx, Inc. Method and apparatus for converting a video image format to a group III fax format
US5907665A (en) * 1995-10-11 1999-05-25 Hewlett-Packard Company Method and apparatus for transforming image data
JP3348167B2 (ja) * 1996-03-26 2002-11-20 シャープ株式会社 画像２値化装置
US6411737B2 (en) * 1997-12-19 2002-06-25 Ncr Corporation Method of selecting one of a plurality of binarization programs
KR100492529B1 (ko) * 1997-12-23 2005-10-26 엘지전자 주식회사 적응 단순 이진화 영상처리방법
JPH11317876A (ja) * 1998-03-04 1999-11-16 Riso Kagaku Corp ダブルトーン印刷装置およびダブルトーン印刷用濃度補正曲線作成方法
US6766042B2 (en) 2001-04-26 2004-07-20 Memphis Eye & Contact Associates System to automatically detect eye corneal striae
US7440633B2 (en) * 2003-12-19 2008-10-21 Sharp Laboratories Of America, Inc. Enhancing the quality of decoded quantized images
US7424168B2 (en) * 2003-12-24 2008-09-09 Sharp Laboratories Of America, Inc. Enhancing the quality of decoded quantized images
US7424166B2 (en) * 2003-12-24 2008-09-09 Sharp Laboratories Of America, Inc. Enhancing the quality of decoded quantized images
US7400779B2 (en) * 2004-01-08 2008-07-15 Sharp Laboratories Of America, Inc. Enhancing the quality of decoded quantized images
US8571307B2 (en) 2010-11-16 2013-10-29 Hand Held Products, Inc. Method and system operative to process monochrome image data
US8600158B2 (en) 2010-11-16 2013-12-03 Hand Held Products, Inc. Method and system operative to process color image data
US10291597B2 (en) 2014-08-14 2019-05-14 Cisco Technology, Inc. Sharing resources across multiple devices in online meetings
US10542126B2 (en) 2014-12-22 2020-01-21 Cisco Technology, Inc. Offline virtual participation in an online conference meeting
US9948786B2 (en) 2015-04-17 2018-04-17 Cisco Technology, Inc. Handling conferences using highly-distributed agents
US9497412B1 (en) * 2015-07-27 2016-11-15 Cisco Technology, Inc. Video conference audio/video verification
US10592867B2 (en) 2016-11-11 2020-03-17 Cisco Technology, Inc. In-meeting graphical user interface display using calendar information and system
US10516707B2 (en) 2016-12-15 2019-12-24 Cisco Technology, Inc. Initiating a conferencing meeting using a conference room device
US10440073B2 (en) 2017-04-11 2019-10-08 Cisco Technology, Inc. User interface for proximity based teleconference transfer
US10375125B2 (en) 2017-04-27 2019-08-06 Cisco Technology, Inc. Automatically joining devices to a video conference
US10375474B2 (en) 2017-06-12 2019-08-06 Cisco Technology, Inc. Hybrid horn microphone
US10477148B2 (en) 2017-06-23 2019-11-12 Cisco Technology, Inc. Speaker anticipation
US10516709B2 (en) 2017-06-29 2019-12-24 Cisco Technology, Inc. Files automatically shared at conference initiation
US10706391B2 (en) 2017-07-13 2020-07-07 Cisco Technology, Inc. Protecting scheduled meeting in physical room
US10091348B1 (en) 2017-07-25 2018-10-02 Cisco Technology, Inc. Predictive model for voice/video over IP calls

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4442544A (en) * 1981-07-09 1984-04-10 Xerox Corporation Adaptive thresholder
US4575768A (en) * 1982-03-18 1986-03-11 Ricoh Company, Ltd. Conversion to a two-valued video signal
US4468704A (en) * 1982-10-28 1984-08-28 Xerox Corporation Adaptive thresholder
US4644410A (en) * 1985-03-11 1987-02-17 R. A. McDonald Dynamic threshold binary generator

Also Published As

Publication number Publication date
KR880702027A (ko) 1988-11-07
JPH01502312A (ja) 1989-08-10
FR2604582A1 (fr) 1988-04-01
EP0266241B1 (de) 1992-01-15
US4977605A (en) 1990-12-11
FR2604582B1 (fr) 1989-01-06
KR960008379B1 (ko) 1996-06-26
ES2028896T3 (es) 1992-07-16
WO1988002587A1 (fr) 1988-04-07
EP0266241A1 (de) 1988-05-04
ATE71787T1 (de) 1992-02-15

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee