FR2390056A1 - - Google Patents

Info

Publication number
FR2390056A1
FR2390056A1 FR7813231A FR7813231A FR2390056A1 FR 2390056 A1 FR2390056 A1 FR 2390056A1 FR 7813231 A FR7813231 A FR 7813231A FR 7813231 A FR7813231 A FR 7813231A FR 2390056 A1 FR2390056 A1 FR 2390056A1
Authority
FR
France
Prior art keywords
amplitude
signal
tilting pulse
improving
threshold value
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.)
Withdrawn
Application number
FR7813231A
Other languages
English (en)
French (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.)
HELL RUDOLF GmbH
Original Assignee
HELL RUDOLF 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 HELL RUDOLF GmbH filed Critical HELL RUDOLF GmbH
Publication of FR2390056A1 publication Critical patent/FR2390056A1/fr
Withdrawn legal-status Critical Current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
    • H04N1/409—Edge or detail enhancement; Noise or error suppression
    • H04N1/4092—Edge or detail enhancement
    • 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
    • H04N1/41—Bandwidth or redundancy reduction

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Solid State Image Pick-Up Elements (AREA)
  • Facsimile Scanning Arrangements (AREA)
FR7813231A 1977-05-05 1978-05-03 Withdrawn FR2390056A1 (https=)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2720079A DE2720079C3 (de) 1977-05-05 1977-05-05 Verfahren zur Verbesserung der Bildqualität bei der Faksimile-Übertragung

Publications (1)

Publication Number Publication Date
FR2390056A1 true FR2390056A1 (https=) 1978-12-01

Family

ID=6008068

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7813231A Withdrawn FR2390056A1 (https=) 1977-05-05 1978-05-03

Country Status (14)

Country Link
AT (1) AT372561B (https=)
AU (1) AU518941B2 (https=)
BE (1) BE866727A (https=)
CH (1) CH627317A5 (https=)
DE (1) DE2720079C3 (https=)
DK (1) DK191378A (https=)
FI (1) FI781369A7 (https=)
FR (1) FR2390056A1 (https=)
GB (1) GB1604106A (https=)
IT (1) IT1095722B (https=)
NL (1) NL7804772A (https=)
NO (1) NO781338L (https=)
SE (1) SE7804769L (https=)
YU (1) YU101778A (https=)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2429528A1 (fr) * 1978-06-19 1980-01-18 Hell Rudolf Gmbh Dispositif d'exploration utilisable notamment pour la transmission de fac-similes

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4589034A (en) * 1980-12-05 1986-05-13 Canon Kabushiki Kaisha Image processing apparatus
DE3441152A1 (de) * 1984-11-10 1986-05-28 Grundig E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig holländ. Stiftung & Co KG, 8510 Fürth Verfahren zur magnetischen aufzeichnung und wiedergabe von telekommunikations-signalen, insbesondere von videotext- und/oder kabeltext-signalen

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3189685A (en) * 1961-04-21 1965-06-15 Philco Corp Two-level quantization system
DE1268657B (de) * 1965-07-14 1968-05-22 Hell Rudolf Dr Ing Fa Verfahren zur Steigerung der Schaerfe bei der Aufzeichnung der Reproduktionen lichtelektrisch abgetasteter Bildvorlagen
US3495032A (en) * 1968-10-07 1970-02-10 Graphic Transmission Systems I Bandwidth reduction system
US3538246A (en) * 1968-05-22 1970-11-03 Southern Pacific Transport Co Bandwidth reduction technique for analog signals
FR2125532A1 (https=) * 1971-02-16 1972-09-29 Graphic Sciences Inc
FR2166170A1 (https=) * 1971-12-29 1973-08-10 Xerox Corp

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2114149C3 (de) * 1971-03-24 1973-09-20 Robert Bosch Fernsehanlagen Gmbh, 6100 Darmstadt Amphtudendiskriminator fur eine Schaltungsanordnung zur Erzeugung eines Korrektursignals zur Flankenverstelle rung von Impulsen

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3189685A (en) * 1961-04-21 1965-06-15 Philco Corp Two-level quantization system
DE1268657B (de) * 1965-07-14 1968-05-22 Hell Rudolf Dr Ing Fa Verfahren zur Steigerung der Schaerfe bei der Aufzeichnung der Reproduktionen lichtelektrisch abgetasteter Bildvorlagen
US3538246A (en) * 1968-05-22 1970-11-03 Southern Pacific Transport Co Bandwidth reduction technique for analog signals
US3495032A (en) * 1968-10-07 1970-02-10 Graphic Transmission Systems I Bandwidth reduction system
FR2125532A1 (https=) * 1971-02-16 1972-09-29 Graphic Sciences Inc
FR2166170A1 (https=) * 1971-12-29 1973-08-10 Xerox Corp

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2429528A1 (fr) * 1978-06-19 1980-01-18 Hell Rudolf Gmbh Dispositif d'exploration utilisable notamment pour la transmission de fac-similes

Also Published As

Publication number Publication date
IT7822932A0 (it) 1978-05-03
IT1095722B (it) 1985-08-17
AT372561B (de) 1983-10-25
BE866727A (fr) 1978-09-01
DK191378A (da) 1978-11-06
NL7804772A (nl) 1978-11-07
DE2720079B2 (de) 1981-01-22
NO781338L (no) 1978-11-07
GB1604106A (en) 1981-12-02
DE2720079A1 (de) 1978-11-09
FI781369A7 (fi) 1978-11-06
AU518941B2 (en) 1981-10-29
SE7804769L (sv) 1978-11-06
DE2720079C3 (de) 1981-11-05
ATA303978A (de) 1983-02-15
CH627317A5 (en) 1981-12-31
AU3577078A (en) 1979-11-08
YU101778A (en) 1982-08-31

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Legal Events

Date Code Title Description
ST Notification of lapse