DE69015252T2 - Vorrichtung zur Umwandlung von Bildsignalen in binäre Form. - Google Patents

Vorrichtung zur Umwandlung von Bildsignalen in binäre Form.

Info

Publication number
DE69015252T2
DE69015252T2 DE69015252T DE69015252T DE69015252T2 DE 69015252 T2 DE69015252 T2 DE 69015252T2 DE 69015252 T DE69015252 T DE 69015252T DE 69015252 T DE69015252 T DE 69015252T DE 69015252 T2 DE69015252 T2 DE 69015252T2
Authority
DE
Germany
Prior art keywords
image signals
binary form
converting image
converting
binary
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 - Fee Related
Application number
DE69015252T
Other languages
English (en)
Other versions
DE69015252D1 (de
Inventor
Seiji Mizuoka
Kazumasa Okumura
Akira Kobayashi
Junichi Hada
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Application granted granted Critical
Publication of DE69015252D1 publication Critical patent/DE69015252D1/de
Publication of DE69015252T2 publication Critical patent/DE69015252T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H04N1/403—Discrimination between the two tones in the picture signal of a two-tone original
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/20—Image preprocessing
    • G06V10/28—Quantising the image, e.g. histogram thresholding for discrimination between background and foreground patterns

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Image Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)
DE69015252T 1989-05-16 1990-05-16 Vorrichtung zur Umwandlung von Bildsignalen in binäre Form. Expired - Fee Related DE69015252T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1122137A JPH087785B2 (ja) 1989-05-16 1989-05-16 ２値化処理装置

Publications (2)

Publication Number Publication Date
DE69015252D1 DE69015252D1 (de) 1995-02-02
DE69015252T2 true DE69015252T2 (de) 1995-07-13

Family

ID=14828530

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69015252T Expired - Fee Related DE69015252T2 (de) 1989-05-16 1990-05-16 Vorrichtung zur Umwandlung von Bildsignalen in binäre Form.

Country Status (5)

Country Link
US (1) US5166986A (de)
EP (1) EP0398314B1 (de)
JP (1) JPH087785B2 (de)
KR (1) KR940002236B1 (de)
DE (1) DE69015252T2 (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2596613B2 (ja) * 1989-08-07 1997-04-02 三菱電機株式会社 しきい値決定装置
JPH04275772A (ja) * 1991-03-04 1992-10-01 Eastman Kodak Japan Kk 画像読み取り装置
JP3082286B2 (ja) * 1991-04-26 2000-08-28 松下電器産業株式会社 ２値画化方法
JPH0683964A (ja) * 1992-08-31 1994-03-25 Takayama:Kk 画像照合方法
WO1996024114A2 (en) * 1995-01-31 1996-08-08 United Parcel Service Of America, Inc. Method and apparatus for separating foreground from background in images containing text
US6748115B1 (en) * 1998-06-19 2004-06-08 Cvision Technologies Llc Perceptually lossless image compression
JP2001111825A (ja) * 1999-10-07 2001-04-20 Canon Inc 画像処理装置及び方法
US6728391B1 (en) 1999-12-03 2004-04-27 United Parcel Service Of America, Inc. Multi-resolution label locator

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3104372A (en) * 1961-02-02 1963-09-17 Rabinow Engineering Co Inc Multilevel quantizing for character readers
US4003024A (en) * 1975-10-14 1977-01-11 Rockwell International Corporation Two-dimensional binary data enhancement system
GB2129635B (en) * 1979-09-21 1984-12-19 Emi Ltd Controlling the grey levels represented by a video signal
JPS6053349B2 (ja) * 1981-06-19 1985-11-25 株式会社日立製作所 画像処理プロセツサ
JPS59106079A (ja) * 1982-12-10 1984-06-19 Omron Tateisi Electronics Co 図形照合装置の二値化装置
JPH0632072B2 (ja) * 1984-02-09 1994-04-27 日本電気株式会社 多値パタ−ン信号のスライス回路
US4741046A (en) * 1984-07-27 1988-04-26 Konishiroku Photo Industry Co., Ltd. Method of discriminating pictures
US4783838A (en) * 1984-12-26 1988-11-08 Konishiroku Photo Industry Co., Ltd. Image processing method and apparatus therefor
US4742551A (en) * 1985-10-07 1988-05-03 Fairchild Camera & Instrument Corporation Multistatistics gatherer
US4791675A (en) * 1985-12-31 1988-12-13 Schlumberger Systems And Services, Inc. VSP Connectivity pattern recognition system
US4969198A (en) * 1986-04-17 1990-11-06 International Business Machines Corporation System for automatic inspection of periodic patterns
US4903313A (en) * 1986-07-03 1990-02-20 Ricoh Company, Ltd. Character recognition method
JP2659198B2 (ja) * 1986-11-12 1997-09-30 日本電気株式会社 画像２値化装置
JPS63261486A (ja) * 1987-04-20 1988-10-28 Nec Corp 書体識別装置
JPH01183793A (ja) * 1988-01-18 1989-07-21 Toshiba Corp 文字認識装置

Also Published As

Publication number Publication date
US5166986A (en) 1992-11-24
JPH02300980A (ja) 1990-12-13
KR940002236B1 (ko) 1994-03-19
JPH087785B2 (ja) 1996-01-29
EP0398314A2 (de) 1990-11-22
EP0398314B1 (de) 1994-12-21
EP0398314A3 (de) 1991-08-07
DE69015252D1 (de) 1995-02-02
KR900019398A (ko) 1990-12-24

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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