FR2541838B1 - Dispositif pour convertir un signal video analogique en un signal a deux niveaux - Google Patents

Dispositif pour convertir un signal video analogique en un signal a deux niveaux

Info

Publication number
FR2541838B1
FR2541838B1 FR8402421A FR8402421A FR2541838B1 FR 2541838 B1 FR2541838 B1 FR 2541838B1 FR 8402421 A FR8402421 A FR 8402421A FR 8402421 A FR8402421 A FR 8402421A FR 2541838 B1 FR2541838 B1 FR 2541838B1
Authority
FR
France
Prior art keywords
converting
analogue video
signal
video signal
level signal
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
Application number
FR8402421A
Other languages
English (en)
Other versions
FR2541838A1 (fr
Inventor
Martinus Leonardus Gera Thoone
Roelof Hoekstra
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of FR2541838A1 publication Critical patent/FR2541838A1/fr
Application granted granted Critical
Publication of FR2541838B1 publication Critical patent/FR2541838B1/fr
Expired 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Picture Signal Circuits (AREA)
  • Collating Specific Patterns (AREA)
FR8402421A 1983-02-24 1984-02-17 Dispositif pour convertir un signal video analogique en un signal a deux niveaux Expired FR2541838B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL8300686A NL8300686A (nl) 1983-02-24 1983-02-24 Inrichting voor het omzetten van een analoog videosignaal in een tweewaardig signaal.

Publications (2)

Publication Number Publication Date
FR2541838A1 FR2541838A1 (fr) 1984-08-31
FR2541838B1 true FR2541838B1 (fr) 1987-10-09

Family

ID=19841468

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8402421A Expired FR2541838B1 (fr) 1983-02-24 1984-02-17 Dispositif pour convertir un signal video analogique en un signal a deux niveaux

Country Status (6)

Country Link
JP (1) JPS59161973A (fr)
BE (1) BE898990A (fr)
DE (1) DE3403792A1 (fr)
FR (1) FR2541838B1 (fr)
GB (1) GB2135852B (fr)
NL (1) NL8300686A (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0681258B2 (ja) * 1988-12-05 1994-10-12 三菱電機株式会社 イメージデータの二値化回路
JP2809447B2 (ja) * 1989-01-21 1998-10-08 株式会社リコー 画像処理装置
JPH05244419A (ja) * 1991-11-25 1993-09-21 Eastman Kodak Co ２階調適応閾値を決定するシステムおよび方法
FR2812985B1 (fr) * 2000-08-11 2003-08-22 Atmel Grenoble Sa Circuit de demodulation d'un signal logique transmis par des voies analogiques

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE323559C (de) * 1919-03-18 1920-07-29 Oscar Mey Vorrichtung zur willkuerlichen Auswahl der zu kontrollierenden Arbeiter und Angestellten in gewerblichen und kaufmaennischen Betrieben
US3500073A (en) * 1966-09-15 1970-03-10 Phonocopy Inc Analog to binary signal processor
US3566281A (en) * 1968-05-21 1971-02-23 Ibm Electric pulse wave clipping circuitry
CA974607A (en) * 1971-12-13 1975-09-16 Bendix Corporation (The) System for converting modulated signals to squarewave outputs
US3869698A (en) * 1973-11-29 1975-03-04 Mohawk Data Sciences Corp Optical character recognition video amplifier and digitizer
FR2437125A1 (fr) * 1978-09-21 1980-04-18 Cit Alcatel Dispositif de traitement d'un signal d'analyse d'image

Also Published As

Publication number Publication date
FR2541838A1 (fr) 1984-08-31
NL8300686A (nl) 1984-09-17
BE898990A (fr) 1984-08-22
GB2135852A (en) 1984-09-05
JPS59161973A (ja) 1984-09-12
JPH0439828B2 (fr) 1992-06-30
DE3403792A1 (de) 1984-08-30
GB8404411D0 (en) 1984-03-28
GB2135852B (en) 1987-05-07

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Legal Events

Date Code Title Description
ST Notification of lapse