GB1518177A - Method and device for producing binary signals from an original by means of a television camera - Google Patents

Method and device for producing binary signals from an original by means of a television camera

Info

Publication number
GB1518177A
GB1518177A GB4379275A GB4379275A GB1518177A GB 1518177 A GB1518177 A GB 1518177A GB 4379275 A GB4379275 A GB 4379275A GB 4379275 A GB4379275 A GB 4379275A GB 1518177 A GB1518177 A GB 1518177A
Authority
GB
United Kingdom
Prior art keywords
signal
line
signals
level
white
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
GB4379275A
Other languages
English (en)
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Publication of GB1518177A publication Critical patent/GB1518177A/en
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)
  • Picture Signal Circuits (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Facsimile Scanning Arrangements (AREA)
GB4379275A 1974-10-24 1975-10-24 Method and device for producing binary signals from an original by means of a television camera Expired GB1518177A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742450529 DE2450529C3 (de) 1974-10-24 1974-10-24 Verfahren und Vorrichtung zur Erzeugung binärer Signale

Publications (1)

Publication Number Publication Date
GB1518177A true GB1518177A (en) 1978-07-19

Family

ID=5929061

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4379275A Expired GB1518177A (en) 1974-10-24 1975-10-24 Method and device for producing binary signals from an original by means of a television camera

Country Status (6)

Country Link
AT (1) AT344258B (de)
CH (1) CH591793A5 (de)
DE (1) DE2450529C3 (de)
FR (1) FR2290110A1 (de)
GB (1) GB1518177A (de)
NL (1) NL7512440A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0033623A2 (de) * 1980-01-31 1981-08-12 Ncr Canada Ltd - Ncr Canada Ltee Verfahren und Vorrichtung zur Reduktion der Auflösung der Grauskala eines digitalisierten Bildes
GB2157113A (en) * 1984-04-05 1985-10-16 British Library Board Improved threshold detector

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2814891C3 (de) * 1978-04-06 1982-02-11 Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel Verfahren zur Umwandlung eines Videosignals in ein Schwarz/Weiß-Signal
US4200861A (en) * 1978-09-01 1980-04-29 View Engineering, Inc. Pattern recognition apparatus and method
US4399469A (en) * 1980-04-23 1983-08-16 American Hoechst Corporation Imaging system and method with improved boundary detection
DE3413651C3 (de) * 1983-04-12 1997-11-20 Canon Kk Bildsignalverarbeitungsgerät
DE29700983U1 (de) * 1997-01-22 1997-03-13 Irion Sen Erhard Anordnung zur Ausgabe eines mittels einer Videokamera aufgenommenen Bildes durch ein Telefaxgerät

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0033623A2 (de) * 1980-01-31 1981-08-12 Ncr Canada Ltd - Ncr Canada Ltee Verfahren und Vorrichtung zur Reduktion der Auflösung der Grauskala eines digitalisierten Bildes
EP0033623A3 (en) * 1980-01-31 1982-01-20 Ncr Canada Ltd - Ncr Canada Ltee A method and apparatus for reducing the gray scale resolution of a digitized image
GB2157113A (en) * 1984-04-05 1985-10-16 British Library Board Improved threshold detector

Also Published As

Publication number Publication date
FR2290110A1 (fr) 1976-05-28
FR2290110B1 (de) 1982-10-15
NL7512440A (nl) 1976-04-27
DE2450529B2 (de) 1978-05-24
CH591793A5 (de) 1977-09-30
AT344258B (de) 1978-07-10
ATA801975A (de) 1977-11-15
DE2450529C3 (de) 1979-01-25
DE2450529A1 (de) 1976-04-29

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee