FR2437125B1 - - Google Patents

Info

Publication number
FR2437125B1
FR2437125B1 FR7827070A FR7827070A FR2437125B1 FR 2437125 B1 FR2437125 B1 FR 2437125B1 FR 7827070 A FR7827070 A FR 7827070A FR 7827070 A FR7827070 A FR 7827070A FR 2437125 B1 FR2437125 B1 FR 2437125B1
Authority
FR
France
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
FR7827070A
Other versions
FR2437125A1 (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.)
Alcatel CIT SA
Original Assignee
Alcatel CIT SA
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 Alcatel CIT SA filed Critical Alcatel CIT SA
Priority to FR7827070A priority Critical patent/FR2437125A1/fr
Priority to GB7929719A priority patent/GB2030818B/en
Priority to US06/070,760 priority patent/US4272789A/en
Priority to BE1/9510A priority patent/BE878535A/fr
Priority to JP11663979A priority patent/JPS5542492A/ja
Priority to NLAANVRAGE7906818,A priority patent/NL182191C/xx
Priority to IT68804/79A priority patent/IT1119159B/it
Priority to DE2937340A priority patent/DE2937340C3/de
Priority to LU81701A priority patent/LU81701A1/fr
Priority to IE1783/79A priority patent/IE48554B1/en
Priority to CA336,049A priority patent/CA1126852A/fr
Publication of FR2437125A1 publication Critical patent/FR2437125A1/fr
Application granted granted Critical
Publication of FR2437125B1 publication Critical patent/FR2437125B1/fr
Granted 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
FR7827070A 1978-09-21 1978-09-21 Dispositif de traitement d'un signal d'analyse d'image Granted FR2437125A1 (fr)

Priority Applications (11)

Application Number Priority Date Filing Date Title
FR7827070A FR2437125A1 (fr) 1978-09-21 1978-09-21 Dispositif de traitement d'un signal d'analyse d'image
GB7929719A GB2030818B (en) 1978-09-21 1979-08-28 Pulse forming circuit for on/off conversion of an image analysis signal
US06/070,760 US4272789A (en) 1978-09-21 1979-08-30 Pulse-forming circuit for on/off conversion of an image analysis signal
BE1/9510A BE878535A (fr) 1978-09-21 1979-08-31 Dispositif de traitement d'un signal d'analyse d'image
JP11663979A JPS5542492A (en) 1978-09-21 1979-09-11 Video analysis signal processor
IT68804/79A IT1119159B (it) 1978-09-21 1979-09-12 Dispositivo per il trattamento di un segnale d'analisi d'immagine
NLAANVRAGE7906818,A NL182191C (nl) 1978-09-21 1979-09-12 Verwerkingsketen voor een beeldontledingssignaal.
DE2937340A DE2937340C3 (de) 1978-09-21 1979-09-14 Schaltungsanordnung zur Digitalisierung eines Bildabtastsignals
LU81701A LU81701A1 (fr) 1978-09-21 1979-09-19 Dispositif de traitement d'un signal d'analyse d'image
IE1783/79A IE48554B1 (en) 1978-09-21 1979-09-20 A pulse-forming circuit for on/off conversion of an image analysis signal
CA336,049A CA1126852A (fr) 1978-09-21 1979-09-20 Dispositif de traitement d'un signal d'analyse d'image

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7827070A FR2437125A1 (fr) 1978-09-21 1978-09-21 Dispositif de traitement d'un signal d'analyse d'image

Publications (2)

Publication Number Publication Date
FR2437125A1 FR2437125A1 (fr) 1980-04-18
FR2437125B1 true FR2437125B1 (fr) 1981-02-13

Family

ID=9212874

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7827070A Granted FR2437125A1 (fr) 1978-09-21 1978-09-21 Dispositif de traitement d'un signal d'analyse d'image

Country Status (11)

Country Link
US (1) US4272789A (fr)
JP (1) JPS5542492A (fr)
BE (1) BE878535A (fr)
CA (1) CA1126852A (fr)
DE (1) DE2937340C3 (fr)
FR (1) FR2437125A1 (fr)
GB (1) GB2030818B (fr)
IE (1) IE48554B1 (fr)
IT (1) IT1119159B (fr)
LU (1) LU81701A1 (fr)
NL (1) NL182191C (fr)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4516174A (en) * 1980-03-10 1985-05-07 Ricoh Company, Ltd. Video signal regulating apparatus
US4439789A (en) * 1980-04-11 1984-03-27 Coulter Systems Corporation Binary scan system
JPS5762466A (en) * 1980-10-03 1982-04-15 Canon Inc Original reader
JPS5784670A (en) * 1980-11-17 1982-05-27 Fujitsu Ltd Video signal read-in system
JPS57188177A (en) * 1981-05-15 1982-11-19 Fuji Xerox Co Ltd Picture signal processing device
US4442544A (en) * 1981-07-09 1984-04-10 Xerox Corporation Adaptive thresholder
JPS5876899A (ja) * 1981-10-31 1983-05-10 株式会社東芝 音声区間検出装置
NL8300686A (nl) * 1983-02-24 1984-09-17 Philips Nv Inrichting voor het omzetten van een analoog videosignaal in een tweewaardig signaal.
DE3413651C3 (de) * 1983-04-12 1997-11-20 Canon Kk Bildsignalverarbeitungsgerät
DE3433493A1 (de) * 1983-09-12 1985-04-04 Ricoh Co., Ltd., Tokio/Tokyo System zur digitalisierung von bildsignalen
SE8404576L (sv) * 1983-09-23 1985-03-24 American Telephone & Telegraph Detaljdetektor for maskinvideo
JPS60124173A (ja) * 1983-12-09 1985-07-03 Canon Inc 画像処理装置
US4600951A (en) * 1983-12-20 1986-07-15 At&T Technologies, Inc. Scanning sample, signal generation, data digitizing and retiming system
JPS61121313A (ja) * 1984-11-16 1986-06-09 松下電器産業株式会社 金属化フイルムコンデンサ
US4644410A (en) * 1985-03-11 1987-02-17 R. A. McDonald Dynamic threshold binary generator
US4704637A (en) * 1985-06-21 1987-11-03 Canon Kabushiki Kaisha Image processing apparatus
JPS6297079A (ja) * 1985-10-24 1987-05-06 Hitachi Ltd ビデオ信号の２値化回路
US4853795A (en) * 1987-07-24 1989-08-01 Eastman Kodak Company Forward look ahead techniques for tracking background and noise levels in scanned video images
US4982294A (en) * 1987-07-24 1991-01-01 Eastman Kodak Company Apparatus for enhancing and thresholding scanned microfilm images and methods for use therein
US4868670A (en) * 1987-07-24 1989-09-19 Eastman Kodak Company Apparatus and method for improving the compressibility of an enhanced image through use of a momentarily varying threshold level
US4908875A (en) * 1989-03-21 1990-03-13 Hughes Aircraft Company Adaptive thresholding technique
US5872468A (en) * 1997-06-12 1999-02-16 Northern Telecom Limited Level detector circuit, interface and method for interpreting and processing multi-level signals
EP0989738A1 (fr) * 1998-09-22 2000-03-29 Hewlett-Packard Company Procédé d'analyse de documents pour détecter les régions blanches/noires ou couleurs et dispositif de balayage pour ce procédé

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3267293A (en) * 1963-04-25 1966-08-16 Sperry Rand Corp Character recognition circuit
US3472958A (en) * 1966-08-01 1969-10-14 Xerox Corp Facsimile system
US3534334A (en) * 1967-06-20 1970-10-13 Ibm Automatic control of a threshold in the digitization of an analog signal
US3566281A (en) * 1968-05-21 1971-02-23 Ibm Electric pulse wave clipping circuitry
GB1383740A (en) * 1971-02-25 1974-02-12 Image Analysing Computers Ltd Detection devices for image analysis systems
US3723649A (en) * 1971-04-27 1973-03-27 Electronic Image Syst Corp Adaptive binary state decision system
US3987413A (en) * 1975-01-22 1976-10-19 Xerox Corporation Detection system
US4012715A (en) * 1975-10-02 1977-03-15 Burroughs Corporation Adaptive information signal discriminator

Also Published As

Publication number Publication date
IT7968804A0 (it) 1979-09-12
IT1119159B (it) 1986-03-03
IE791783L (en) 1980-03-21
GB2030818A (en) 1980-04-10
JPS5542492A (en) 1980-03-25
NL7906818A (nl) 1980-03-25
US4272789A (en) 1981-06-09
GB2030818B (en) 1983-03-23
DE2937340B2 (de) 1981-05-14
NL182191C (nl) 1988-01-18
DE2937340A1 (de) 1980-03-27
FR2437125A1 (fr) 1980-04-18
IE48554B1 (en) 1985-03-06
JPH022347B2 (fr) 1990-01-17
DE2937340C3 (de) 1982-01-21
CA1126852A (fr) 1982-06-29
LU81701A1 (fr) 1980-04-21
NL182191B (nl) 1987-08-17
BE878535A (fr) 1980-02-29

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Legal Events

Date Code Title Description
ST Notification of lapse