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- Withdrawn
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)
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 (sv) | 1978-12-01 |
Family
ID=6008068
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7813231A Withdrawn FR2390056A1 (sv) | 1977-05-05 | 1978-05-03 |
Country Status (14)
Country | Link |
---|---|
AT (1) | AT372561B (sv) |
AU (1) | AU518941B2 (sv) |
BE (1) | BE866727A (sv) |
CH (1) | CH627317A5 (sv) |
DE (1) | DE2720079C3 (sv) |
DK (1) | DK191378A (sv) |
FI (1) | FI781369A (sv) |
FR (1) | FR2390056A1 (sv) |
GB (1) | GB1604106A (sv) |
IT (1) | IT1095722B (sv) |
NL (1) | NL7804772A (sv) |
NO (1) | NO781338L (sv) |
SE (1) | SE7804769L (sv) |
YU (1) | YU101778A (sv) |
Cited By (1)
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)
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)
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 (sv) * | 1971-02-16 | 1972-09-29 | Graphic Sciences Inc | |
FR2166170A1 (sv) * | 1971-12-29 | 1973-08-10 | Xerox Corp |
Family Cites Families (1)
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 |
-
1977
- 1977-05-05 DE DE2720079A patent/DE2720079C3/de not_active Expired
-
1978
- 1978-04-07 CH CH375478A patent/CH627317A5/de not_active IP Right Cessation
- 1978-04-17 NO NO781338A patent/NO781338L/no unknown
- 1978-04-26 SE SE7804769A patent/SE7804769L/sv unknown
- 1978-04-27 YU YU01017/78A patent/YU101778A/xx unknown
- 1978-04-27 AT AT0303978A patent/AT372561B/de not_active IP Right Cessation
- 1978-05-03 IT IT22932/78A patent/IT1095722B/it active
- 1978-05-03 FR FR7813231A patent/FR2390056A1/fr not_active Withdrawn
- 1978-05-03 FI FI781369A patent/FI781369A/fi not_active Application Discontinuation
- 1978-05-03 DK DK191378A patent/DK191378A/da not_active Application Discontinuation
- 1978-05-03 NL NL7804772A patent/NL7804772A/xx not_active Application Discontinuation
- 1978-05-04 AU AU35770/78A patent/AU518941B2/en not_active Expired
- 1978-05-05 BE BE187411A patent/BE866727A/xx not_active IP Right Cessation
- 1978-05-05 GB GB18069/78A patent/GB1604106A/en not_active Expired
Patent Citations (6)
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 (sv) * | 1971-02-16 | 1972-09-29 | Graphic Sciences Inc | |
FR2166170A1 (sv) * | 1971-12-29 | 1973-08-10 | Xerox Corp |
Cited By (1)
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 |
---|---|
IT1095722B (it) | 1985-08-17 |
AU3577078A (en) | 1979-11-08 |
DE2720079A1 (de) | 1978-11-09 |
YU101778A (en) | 1982-08-31 |
IT7822932A0 (it) | 1978-05-03 |
CH627317A5 (en) | 1981-12-31 |
SE7804769L (sv) | 1978-11-06 |
BE866727A (fr) | 1978-09-01 |
DE2720079C3 (de) | 1981-11-05 |
DK191378A (da) | 1978-11-06 |
NO781338L (no) | 1978-11-07 |
GB1604106A (en) | 1981-12-02 |
NL7804772A (nl) | 1978-11-07 |
DE2720079B2 (de) | 1981-01-22 |
FI781369A (fi) | 1978-11-06 |
AU518941B2 (en) | 1981-10-29 |
AT372561B (de) | 1983-10-25 |
ATA303978A (de) | 1983-02-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |