FR2399167B1 - Circuit de fac-simile - Google Patents
Circuit de fac-simileInfo
- 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
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)
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)
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 |
EP0120980B1 (fr) * | 1983-03-30 | 1987-06-24 | Ibm Deutschland Gmbh | Circuit de compensation de diaphonie dans des dispositifs d'analyse électro-optiques |
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)
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 |
-
1977
- 1977-07-28 BE BE179713A patent/BE857245A/xx not_active IP Right Cessation
-
1978
- 1978-06-22 US US05/917,974 patent/US4208677A/en not_active Expired - Lifetime
- 1978-07-21 DE DE2832109A patent/DE2832109C2/de not_active Expired
- 1978-07-25 GB GB787831044A patent/GB2001825B/en not_active Expired
- 1978-07-25 IT IT68775/78A patent/IT1160444B/it active
- 1978-07-25 FR FR7821991A patent/FR2399167B1/fr not_active Expired
- 1978-07-25 SE SE7808127A patent/SE438933B/sv not_active IP Right Cessation
- 1978-07-25 JP JP53090052A patent/JPS5932027B2/ja not_active Expired
Also Published As
Publication number | Publication date |
---|---|
IT7868775A0 (it) | 1978-07-25 |
DE2832109C2 (de) | 1983-01-20 |
SE438933B (sv) | 1985-05-13 |
GB2001825A (en) | 1979-02-07 |
GB2001825B (en) | 1982-01-27 |
JPS5932027B2 (ja) | 1984-08-06 |
US4208677A (en) | 1980-06-17 |
JPS5425615A (en) | 1979-02-26 |
FR2399167A1 (fr) | 1979-02-23 |
IT1160444B (it) | 1987-03-11 |
SE7808127L (sv) | 1979-01-29 |
DE2832109A1 (de) | 1979-02-08 |
BE857245A (nl) | 1977-11-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |