[go: up one dir, main page]

KR880702027A - 다수의 휘도준위를 갖는 화상의 이진화 처리방법 - Google Patents

다수의 휘도준위를 갖는 화상의 이진화 처리방법

Info

Publication number
KR880702027A
KR880702027A KR1019880700569A KR880700569A KR880702027A KR 880702027 A KR880702027 A KR 880702027A KR 1019880700569 A KR1019880700569 A KR 1019880700569A KR 880700569 A KR880700569 A KR 880700569A KR 880702027 A KR880702027 A KR 880702027A
Authority
KR
South Korea
Prior art keywords
histogram
pct
pixel
threshold
date
Prior art date
Application number
KR1019880700569A
Other languages
English (en)
Other versions
KR960008379B1 (ko
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 filed Critical
Publication of KR880702027A publication Critical patent/KR880702027A/ko
Application granted granted Critical
Publication of KR960008379B1 publication Critical patent/KR960008379B1/ko

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 Analysis (AREA)
  • Image Input (AREA)
KR1019880700569A 1986-09-30 1987-09-28 다수의 휘도준위를 갖는 화상의 이진화 처리방법 KR960008379B1 (ko)

Applications Claiming Priority (3)

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
FR86/13577 1986-09-30
PCT/FR1987/000368 WO1988002587A1 (fr) 1986-09-30 1987-09-28 Quantification binaire d'une image a multiples niveaux de gris

Publications (2)

Publication Number Publication Date
KR880702027A true KR880702027A (ko) 1988-11-07
KR960008379B1 KR960008379B1 (ko) 1996-06-26

Family

ID=9339379

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019880700569A KR960008379B1 (ko) 1986-09-30 1987-09-28 다수의 휘도준위를 갖는 화상의 이진화 처리방법

Country Status (9)

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

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 (en) * 1990-03-07 1991-09-11 International Business Machines Corporation Image processor mepping source pixel intensities to a limited range of display intensity values
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
FR2604582A1 (fr) 1988-04-01
DE3776078D1 (de) 1992-02-27
EP0266241B1 (fr) 1992-01-15
ES2028896T3 (es) 1992-07-16
KR960008379B1 (ko) 1996-06-26
EP0266241A1 (fr) 1988-05-04
US4977605A (en) 1990-12-11
WO1988002587A1 (fr) 1988-04-07
FR2604582B1 (fr) 1989-01-06
JPH01502312A (ja) 1989-08-10
ATE71787T1 (de) 1992-02-15

Similar Documents

Publication Publication Date Title
KR880702027A (ko) 다수의 휘도준위를 갖는 화상의 이진화 처리방법
JP4261005B2 (ja) 領域ベースのイメージ２値化システム
Kasar et al. Font and background color independent text binarization
US7437002B2 (en) Image recognition system utilizing an edge image and a binary image
Lu et al. Binarization of badly illuminated document images through shading estimation and compensation
EP0855830A3 (en) Text/line art and halftone discrimination for pixel resolution enhancement
EP0898414A3 (en) Image area judging apparatus
Amin et al. A robust system for thresholding and skew detection in mixed text/graphics documents
CA2144793A1 (en) Method of Thresholding Document Images
EP0096219A3 (en) Image classification method based on histogram analysis
EP0961472A3 (en) Image processing apparatus and method and computer-readable memory
DE69220118T2 (de) Bildbinarisierungssystem
JPH0565911B2 (ko)
EP0870276B1 (en) A method for transforming a gray-level image into a black-and-white image
Aparna et al. A complete OCR system development of Tamil magazine documents
JPS62147584A (ja) 文字読取装置
KR100242298B1 (ko) 문자 문서의 화상데이터 이치화방법
Oh Document image binarization preserving stroke connectivity
JPH0335400A (ja) ナンバープレートの用途コード認識方法
Chiddarwar et al. Contrast Based Enhancement of Palm-leaf Manuscript Images
JPS63184886A (ja) 画像処理における２値化方式
Kasar et al. Specialized Text Binarization Technique for Camera based Document images
Chen et al. Global automatic thresholding with edge information and moving average on histogram
Goto et al. Character pattern extraction from documents with complex backgrounds
JP2001134773A (ja) 画像処理装置およびその方法

Legal Events

Date Code Title Description
PA0109 Patent application

Patent event code: PA01091R01D

Comment text: Patent Application

Patent event date: 19880524

PG1501 Laying open of application
A201 Request for examination
PA0201 Request for examination

Patent event code: PA02012R01D

Patent event date: 19920924

Comment text: Request for Examination of Application

Patent event code: PA02011R01I

Patent event date: 19880524

Comment text: Patent Application

G160 Decision to publish patent application
PG1605 Publication of application before grant of patent

Comment text: Decision on Publication of Application

Patent event code: PG16051S01I

Patent event date: 19960531

E701 Decision to grant or registration of patent right
PE0701 Decision of registration

Patent event code: PE07011S01D

Comment text: Decision to Grant Registration

Patent event date: 19960924

NORF Unpaid initial registration fee
PC1904 Unpaid initial registration fee