FR2399167B1 - Circuit de fac-simile - Google Patents

Circuit de fac-simile

Info

Publication number
FR2399167B1
FR2399167B1 FR7821991A FR7821991A FR2399167B1 FR 2399167 B1 FR2399167 B1 FR 2399167B1 FR 7821991 A FR7821991 A FR 7821991A FR 7821991 A FR7821991 A FR 7821991A FR 2399167 B1 FR2399167 B1 FR 2399167B1
Authority
FR
France
Prior art keywords
simile
fac
circuit
simile circuit
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
FR7821991A
Other languages
English (en)
Other versions
FR2399167A1 (fr
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 FR2399167A1 publication Critical patent/FR2399167A1/fr
Application granted granted Critical
Publication of FR2399167B1 publication Critical patent/FR2399167B1/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
    • 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
    • H04N1/40062—Discrimination between different image types, e.g. two-tone, continuous tone
    • 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
    • H04N1/405—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels
    • H04N1/4051—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a dispersed dots halftone pattern, the dots having substantially the same size

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)
FR7821991A 1977-07-28 1978-07-25 Circuit de fac-simile Expired FR2399167B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE179713A BE857245A (nl) 1977-07-28 1977-07-28 Faksimileschakeling

Publications (2)

Publication Number Publication Date
FR2399167A1 FR2399167A1 (fr) 1979-02-23
FR2399167B1 true FR2399167B1 (fr) 1985-09-13

Family

ID=3843024

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7821991A Expired FR2399167B1 (fr) 1977-07-28 1978-07-25 Circuit de fac-simile

Country Status (8)

Country Link
US (1) US4208677A (fr)
JP (1) JPS5932027B2 (fr)
BE (1) BE857245A (fr)
DE (1) DE2832109C2 (fr)
FR (1) FR2399167B1 (fr)
GB (1) GB2001825B (fr)
IT (1) IT1160444B (fr)
SE (1) SE438933B (fr)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2826755A1 (de) * 1978-06-19 1979-12-20 Hell Rudolf Dr Ing Gmbh Abtasteinrichtung
JPS55133182A (en) * 1979-04-03 1980-10-16 Ricoh Co Ltd Picture processing unit
DE3024322A1 (de) * 1980-06-27 1982-01-21 Siemens AG, 1000 Berlin und 8000 München Verfahren zur codierung von elektrischen signalen, die bei der abtastung eines grafischen musters mit aus text und bildern gemischtem inhalt gewonnen werden
JPS6027227B2 (ja) * 1980-09-09 1985-06-27 富士ゼロックス株式会社 画像読取り装置
JPS5752261A (en) * 1980-09-11 1982-03-27 Canon Inc Character processor
JPS57129566A (en) * 1981-02-05 1982-08-11 Kokusai Denshin Denwa Co Ltd <Kdd> Control system of linear scan type output device
GB2103449B (en) * 1981-06-29 1985-05-30 Nippon Telegraph & Telephone Method and apparatus for gray level signal processing
BE889996A (nl) * 1981-08-18 1981-12-16 Belge Lampes Mat Electr Mble Facsimile overdrachtsinrichting
GB2114847B (en) * 1981-12-26 1986-02-12 Konishiroku Photo Ind Apparatus for discriminating between linear and tonal picture video signals
JPS5912671A (ja) * 1982-07-12 1984-01-23 Dainippon Screen Mfg Co Ltd 画像走査記録方法
JPS59156070A (ja) * 1983-02-25 1984-09-05 Canon Inc 画像処理装置
DE3372249D1 (en) * 1983-03-30 1987-07-30 Ibm Deutschland Crosstalk compensation circuit for electro-optical scanning devices
JPH0683365B2 (ja) * 1983-05-25 1994-10-19 キヤノン株式会社 画像処理装置
JPS59223073A (ja) * 1983-06-01 1984-12-14 Canon Inc 画像処理装置
JPS59223074A (ja) * 1983-06-01 1984-12-14 Canon Inc 像処理装置
GB2170373B (en) * 1984-12-28 1989-03-15 Canon Kk Image processing apparatus
US4704637A (en) * 1985-06-21 1987-11-03 Canon Kabushiki Kaisha Image processing apparatus
US4719517A (en) * 1986-02-24 1988-01-12 Alden Research Foundation Teletype compatible facsimile recorder

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2255408A (en) * 1939-10-19 1941-09-09 Richard W Carlisle Facsimile system
US3622698A (en) * 1969-03-03 1971-11-23 Magnavox Co Facsimile system with selective contrast control
US3723649A (en) * 1971-04-27 1973-03-27 Electronic Image Syst Corp Adaptive binary state decision system
US4084196A (en) * 1977-01-31 1978-04-11 Dacom, Inc. Electronic half-tone generating means for facsimile reproduction system

Also Published As

Publication number Publication date
GB2001825A (en) 1979-02-07
JPS5932027B2 (ja) 1984-08-06
BE857245A (nl) 1977-11-14
US4208677A (en) 1980-06-17
JPS5425615A (en) 1979-02-26
DE2832109A1 (de) 1979-02-08
IT7868775A0 (it) 1978-07-25
IT1160444B (it) 1987-03-11
DE2832109C2 (de) 1983-01-20
SE438933B (sv) 1985-05-13
GB2001825B (en) 1982-01-27
FR2399167A1 (fr) 1979-02-23
SE7808127L (sv) 1979-01-29

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Legal Events

Date Code Title Description
ST Notification of lapse