FR2414273A1 - Procede pour convertir un signal video en un signal a deux niveaux - Google Patents
Procede pour convertir un signal video en un signal a deux niveauxInfo
- Publication number
- FR2414273A1 FR2414273A1 FR7900459A FR7900459A FR2414273A1 FR 2414273 A1 FR2414273 A1 FR 2414273A1 FR 7900459 A FR7900459 A FR 7900459A FR 7900459 A FR7900459 A FR 7900459A FR 2414273 A1 FR2414273 A1 FR 2414273A1
- Authority
- FR
- France
- Prior art keywords
- video signal
- converting
- signal
- level signal
- signals
- 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.)
- Granted
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)
- Facsimile Scanning Arrangements (AREA)
Abstract
A.PROCEDE DE DETECTION EN FAC-SIMILE. B.PROCEDE CARACTERISE EN CE QU'ON CREE DEUX SIGNAUX ACCOMPAGNES NOTAMMENT, L'UN AU-DESSUS DE L'AUTRE ET ON ASSOCIE LE SIGNAL VIDEO POUR SUIVRE L'UN OU L'AUTRE DES DEUX SIGNAUX EN FONCTION DE LA COMPARAISON ENTRE LE SIGNAL VIDEO ET UN SIGNAL DE REFERENCE. C.L'INVENTION S'APPLIQUE A LA COPIE PAR FAC-SIMILE.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2800759A DE2800759C3 (de) | 1978-01-09 | 1978-01-09 | Verfahren zur Umwandlung eines Videosignals in ein Zwei-Pegel-Signal |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2414273A1 true FR2414273A1 (fr) | 1979-08-03 |
FR2414273B1 FR2414273B1 (fr) | 1982-04-09 |
Family
ID=6029184
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7900459A Granted FR2414273A1 (fr) | 1978-01-09 | 1979-01-09 | Procede pour convertir un signal video en un signal a deux niveaux |
Country Status (8)
Country | Link |
---|---|
US (1) | US4234895A (fr) |
JP (1) | JPS5498110A (fr) |
AU (1) | AU523618B2 (fr) |
DE (1) | DE2800759C3 (fr) |
FR (1) | FR2414273A1 (fr) |
GB (1) | GB2013065B (fr) |
IT (1) | IT1109853B (fr) |
MX (1) | MX146077A (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2434532A1 (fr) * | 1978-08-25 | 1980-03-21 | Hell Rudolf Gmbh | Procede et dispositif pour l'empilage d'un signal video |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4337455A (en) * | 1978-04-21 | 1982-06-29 | Caere Corporation | Apparatus for processing video signals received from an optical scanner |
JPS56129480A (en) * | 1980-03-17 | 1981-10-09 | Matsushita Graphic Commun Syst Inc | Binary discrimination system and its device |
DE3112094C2 (de) * | 1981-03-27 | 1983-05-05 | Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel | Schaltungsanordnung zum Umwandeln analoger Bildsignale für Schwarz/Weiß-Aufzeichnung |
US4442544A (en) * | 1981-07-09 | 1984-04-10 | Xerox Corporation | Adaptive thresholder |
US4525747A (en) * | 1981-08-06 | 1985-06-25 | Toshiyuki Sakai | Analog-to-digital image signal conversion |
GB2120030B (en) * | 1982-03-04 | 1986-11-12 | Sansui Electric Co | Digital signal demodulator circuit |
DE3413651C3 (de) * | 1983-04-12 | 1997-11-20 | Canon Kk | Bildsignalverarbeitungsgerät |
SE8404576L (sv) * | 1983-09-23 | 1985-03-24 | American Telephone & Telegraph | Detaljdetektor for maskinvideo |
JPS60157372A (ja) * | 1984-01-26 | 1985-08-17 | Nippon Kogaku Kk <Nikon> | 画像処理システムの枠検出装置 |
JPS6297079A (ja) * | 1985-10-24 | 1987-05-06 | Hitachi Ltd | ビデオ信号の2値化回路 |
IT1219119B (it) * | 1988-03-18 | 1990-05-03 | Olivetti & Co Spa | Circuito di regolazione automatica della soglia di un segnale di lettura per un dispositivo di scansione digitale di immagini |
SE464210B (sv) * | 1988-06-22 | 1991-03-18 | Esselte Security Syst Ab | Foerfarande och anordning foer markeringsdetektering |
JPH02126771A (ja) * | 1988-11-07 | 1990-05-15 | Aisin Seiki Co Ltd | 画像情報の2値化方法および装置 |
JPH0393354A (ja) * | 1989-09-05 | 1991-04-18 | Eastman Kodatsuku Japan Kk | 擬似階調発生装置 |
DE19758688B4 (de) * | 1996-12-11 | 2006-12-21 | Pfu Ltd. | Bildabtasteinrichtung |
US7298962B2 (en) * | 2003-05-12 | 2007-11-20 | Macrovision Corporation | Method and apparatus for reducing and restoring the effectiveness of a commercial skip system |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3723649A (en) * | 1971-04-27 | 1973-03-27 | Electronic Image Syst Corp | Adaptive binary state decision system |
US3934136A (en) * | 1974-05-06 | 1976-01-20 | Minnesota Mining And Manufacturing Company | Threshold signal circuitry for scanning apparatus |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2911464A (en) * | 1955-11-16 | 1959-11-03 | Muirhead & Co Ltd | Facsimile telegraph systems |
US3159815A (en) * | 1961-11-29 | 1964-12-01 | Ibm | Digitalization system for multi-track optical character sensing |
US3472958A (en) * | 1966-08-01 | 1969-10-14 | Xerox Corp | Facsimile system |
US3566281A (en) * | 1968-05-21 | 1971-02-23 | Ibm | Electric pulse wave clipping circuitry |
US3832577A (en) * | 1973-06-22 | 1974-08-27 | Ibm | Threshold extraction circuitry for noisy electric waveforms |
US3912943A (en) * | 1974-08-09 | 1975-10-14 | Ibm | Video thresholder |
US3952144A (en) * | 1974-10-02 | 1976-04-20 | Faxon Communications Corporation | Methods and apparatus for automatic background and contrast control |
-
1978
- 1978-01-09 DE DE2800759A patent/DE2800759C3/de not_active Expired
-
1979
- 1979-01-03 US US06/000,671 patent/US4234895A/en not_active Expired - Lifetime
- 1979-01-08 GB GB79581A patent/GB2013065B/en not_active Expired
- 1979-01-08 IT IT19115/79A patent/IT1109853B/it active
- 1979-01-09 MX MX176236A patent/MX146077A/es unknown
- 1979-01-09 AU AU43216/79A patent/AU523618B2/en not_active Expired - Fee Related
- 1979-01-09 JP JP43779A patent/JPS5498110A/ja active Pending
- 1979-01-09 FR FR7900459A patent/FR2414273A1/fr active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3723649A (en) * | 1971-04-27 | 1973-03-27 | Electronic Image Syst Corp | Adaptive binary state decision system |
US3934136A (en) * | 1974-05-06 | 1976-01-20 | Minnesota Mining And Manufacturing Company | Threshold signal circuitry for scanning apparatus |
Non-Patent Citations (1)
Title |
---|
EXBK/72 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2434532A1 (fr) * | 1978-08-25 | 1980-03-21 | Hell Rudolf Gmbh | Procede et dispositif pour l'empilage d'un signal video |
Also Published As
Publication number | Publication date |
---|---|
GB2013065B (en) | 1982-04-15 |
IT7919115A0 (it) | 1979-01-08 |
GB2013065A (en) | 1979-08-01 |
MX146077A (es) | 1982-05-11 |
JPS5498110A (en) | 1979-08-02 |
DE2800759B2 (de) | 1981-09-10 |
AU4321679A (en) | 1979-07-19 |
US4234895A (en) | 1980-11-18 |
DE2800759A1 (de) | 1979-07-12 |
IT1109853B (it) | 1985-12-23 |
DE2800759C3 (de) | 1984-08-23 |
AU523618B2 (en) | 1982-08-05 |
FR2414273B1 (fr) | 1982-04-09 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
FR2414273A1 (fr) | Procede pour convertir un signal video en un signal a deux niveaux | |
DE68923949T2 (de) | System zum interaktiven Abgleich des dynamischen Bereiches beim Drucken digitaler Bilder. | |
NL7902787A (nl) | Videosignaalbewerkingsstelsel. | |
DE3382597T2 (de) | Geraet zur videoaufloesung von graphiken. | |
DE3585454D1 (de) | Geraet zur verarbeitung eines bildsignals mit bandkompression. | |
DE3484671D1 (de) | Anordnung zur ueberlagerung von videosignalen. | |
DE3380918D1 (de) | Verarbeitung von farbvideosignalen. | |
DE3578650D1 (de) | Fundamentales geraet zum verarbeiten von videosignalen. | |
FR2441977A1 (fr) | Melangeur de signaux video | |
ES491346A0 (es) | Perfeccionamientos en aparatos de elaboracion de la senal dedetalle vertical de imagenes de video. | |
DE3785871T2 (de) | Vorrichtung zur Kombination von Videosignalen. | |
AT387483B (de) | Anordnung zur verarbeitung von videosignalen | |
FR2435176B1 (fr) | Procede de transmission opto-electronique de l'original d'une image | |
ES515146A0 (es) | "perfeccionamientos introducidos en un aparato de tratamiento de senales, por ejemplo de video". | |
JPS543543A (en) | Image recorder | |
DE59207261D1 (de) | Videorecorder zur aufzeichnung von nach dem letterbox-verfahren übertragenen videosignalen | |
JPS5320347A (en) | Viewer for pseudo-stereo image | |
JPS53106109A (en) | Vedio signal transmitting circuit | |
JPS5370718A (en) | Transmitting system for color picture image | |
NL193336B (nl) | Videosignaalverwerkingsinrichting. | |
ATE35794T1 (de) | Druckabbildungssystem. | |
JPS5429914A (en) | Manuscript reader | |
JPS5411625A (en) | Processing system for video signal | |
FR2507421B1 (fr) | Appareil d'enregistrement de signaux video couleur selon le systeme secam et appareil d'enregistrement et de reproduction | |
JPS5331151A (en) | Automatic focusing device for microscope |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |