KR900019398A - 2치화 처리장치 - Google Patents

2치화 처리장치 Download PDF

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Publication number
KR900019398A
KR900019398A KR1019900007003A KR900007003A KR900019398A KR 900019398 A KR900019398 A KR 900019398A KR 1019900007003 A KR1019900007003 A KR 1019900007003A KR 900007003 A KR900007003 A KR 900007003A KR 900019398 A KR900019398 A KR 900019398A
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KR
South Korea
Prior art keywords
degree
level
connection
signal
frequency
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KR1019900007003A
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English (en)
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KR940002236B1 (ko
Inventor
세이지 미즈오까
카즈마사 오꾸무라
아끼라 고바야시
중이찌 하다
Original Assignee
다니이 아끼오
마쯔시다덴기산교 가부시기가이샤
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Publication of KR900019398A publication Critical patent/KR900019398A/ko
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Publication of KR940002236B1 publication Critical patent/KR940002236B1/ko

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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

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  • 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)

Abstract

내용 없음

Description

2치화 처리장치
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명의 제1실시예에 있어서의 2치화 처리장치의 블록도, 제2도는 "4" 근방의 연결도를 표시한 도면, 제3도(a), (b)는 "4" 근방의 연결도를 산출한 일예를 나타낸 도면, 제4도는 연결로 분포가 2치화 레벨을 바꿈으로서 변화하는 일예를 나타내 도면.

Claims (4)

  1. 영상신호를 2치화하는 수단과, 2치화된 신호로부터 인접하는 화소와의 연결도를 조사해서 연결도 분포를 작성하는 수단과, 각 레벨마다의 연결도 분포로부터, 최대,최소 연결도의 빈도가 높고, 또한 중간 연결도의 빈도의 총화가 최소로 되는 레벨을 2치화레벨로 판정하는 수단을 갖춘 것을 특징으로 하는 2치화 처리장치.
  2. 영상신호를 2치화하는 수단과, 2치화된 신호를 평활화하는 수단과, 평활화된 신호로부터 인접하는 화소와의 연결도를 조사해서 연결도 분포를 작성하는 수단과, 각 레벨마다 연결도분포로부터 최대,최소연결도의 빈도가 높고, 또한 중간연결도의 빈도의 총화가 최소로 되는 레벨을 2치화 레벨로 판정하는 수단을 갖춘 것을 특징으로 하는 2치화 처리장치.
  3. 영상신호를 필터링하는 수단과, 필터링된 신호를 2치화하는 수단과, 2치화된 신호를 평활화 하는 수단과, 평활화된 신호로 부터 인접하는 화소와의 연결도를 조사해서 연결도분포를 작성하는 수단과, 각 레벨마다의 연결도 분포로부터, 최대,최소연결도의 빈도가 높고, 또한 중간연결도의 빈도의 총화가 최소로 되는 레벨을 2치화 레벨로 판정하는 수단을 구비한 것을 특징으로 하는 2치화 처리장치.
  4. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019900007003A 1989-05-16 1990-05-16 영상신호의 2치화 처리장치 KR940002236B1 (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1-122137 1989-05-16
JP1122137A JPH087785B2 (ja) 1989-05-16 1989-05-16 ２値化処理装置

Publications (2)

Publication Number Publication Date
KR900019398A true KR900019398A (ko) 1990-12-24
KR940002236B1 KR940002236B1 (ko) 1994-03-19

Family

ID=14828530

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019900007003A KR940002236B1 (ko) 1989-05-16 1990-05-16 영상신호의 2치화 처리장치

Country Status (5)

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

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
CA2211258C (en) * 1995-01-31 2000-12-26 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
CA1297983C (en) * 1986-11-12 1992-03-24 Shigenobu Kasuya Binary signal producing apparatus for optical character recognition
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
KR940002236B1 (ko) 1994-03-19
US5166986A (en) 1992-11-24
DE69015252D1 (de) 1995-02-02
JPH087785B2 (ja) 1996-01-29
DE69015252T2 (de) 1995-07-13
EP0398314A3 (en) 1991-08-07
EP0398314A2 (en) 1990-11-22
JPH02300980A (ja) 1990-12-13
EP0398314B1 (en) 1994-12-21

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