FR2409860A1 - Procede et dispositif d'analyse optique - Google Patents
Procede et dispositif d'analyse optiqueInfo
- Publication number
- FR2409860A1 FR2409860A1 FR7826788A FR7826788A FR2409860A1 FR 2409860 A1 FR2409860 A1 FR 2409860A1 FR 7826788 A FR7826788 A FR 7826788A FR 7826788 A FR7826788 A FR 7826788A FR 2409860 A1 FR2409860 A1 FR 2409860A1
- Authority
- FR
- France
- Prior art keywords
- analysis method
- optical analysis
- original
- analysis
- reprography
- 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
- H04N1/407—Control or modification of tonal gradation or of extreme levels, e.g. background level
- H04N1/4076—Control or modification of tonal gradation or of extreme levels, e.g. background level dependent on references outside the picture
-
- 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)
- Fax Reproducing Arrangements (AREA)
- Facsimile Scanning Arrangements (AREA)
- Facsimile Image Signal Circuits (AREA)
- Ink Jet (AREA)
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
- Facsimile Heads (AREA)
Abstract
L'INVENTION CONCERNE LE DOMAINE DE LA REPROGRAPHIE. UN DISPOSITF D'ANALYSE ET DE CODAGE D'UN ORIGINAL 12, EN VUE DE SA REPRODUCTION PAR UNE TETE D'IMPRESSION A JET D'ENCRE 62, COMPORTE DES CIRCUITS QUI COMPENSENT AUTOMATIQUEMENT LES VARIATIONS QUI PEUVENT APPARAITRE DANS LE CHEMIN OPTIQUE D'ANALYSE, OU DANS LA VITESSE DE ROTATION DU TAMBOUR 10 QUI PORTE L'ORIGINAL. APPLICATION AUX MACHINES A COPIER A TETE D'IMPRESSION A JET D'ENCRE.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/854,803 US4151555A (en) | 1977-11-25 | 1977-11-25 | Optical scanning and encoding device |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2409860A1 true FR2409860A1 (fr) | 1979-06-22 |
FR2409860B1 FR2409860B1 (fr) | 1983-12-02 |
Family
ID=25319548
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7826788A Granted FR2409860A1 (fr) | 1977-11-25 | 1978-09-19 | Procede et dispositif d'analyse optique |
Country Status (8)
Country | Link |
---|---|
US (1) | US4151555A (fr) |
JP (1) | JPS5476009A (fr) |
CA (1) | CA1088998A (fr) |
DE (1) | DE2850924C2 (fr) |
FR (1) | FR2409860A1 (fr) |
GB (1) | GB2009559B (fr) |
IT (1) | IT1160939B (fr) |
NL (1) | NL7808935A (fr) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6128202Y2 (fr) * | 1979-08-21 | 1986-08-21 | ||
US4256959A (en) * | 1979-09-12 | 1981-03-17 | The Mead Corporation | Optical scanner including feedback for reflector control |
US4320420A (en) * | 1980-07-03 | 1982-03-16 | Xerox Corporation | Hybrid bit clock servo |
JPS59129854A (ja) * | 1983-01-18 | 1984-07-26 | Dainippon Screen Mfg Co Ltd | 画像走査記録時における光量補正方法 |
JPH07108016B2 (ja) | 1984-11-19 | 1995-11-15 | キヤノン株式会社 | カラー画像読み取り装置 |
DE3546890C2 (de) * | 1984-11-19 | 1998-05-20 | Canon Kk | Bilderzeugungsgerät |
US5402048A (en) * | 1993-12-27 | 1995-03-28 | Vernitron Corporation | Nodding scanner |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB751909A (en) * | 1953-08-31 | 1956-07-04 | Fairchild Camera Instr Co | Automatic-gain-control system for photoelectric engraving machines |
GB1194717A (en) * | 1966-06-03 | 1970-06-10 | Zeuthen & Aagaard As | Improvements in and relating to a Machine for Perforating a Stencil Electrically |
US3528749A (en) * | 1966-12-09 | 1970-09-15 | Itek Corp | Apparatus for measuring optical density |
FR2046143A5 (fr) * | 1969-03-03 | 1971-03-05 | Mead Corp | |
US3613103A (en) * | 1969-07-25 | 1971-10-12 | Alden Res Found | Analog signal modifying apparatus |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1848839A (en) * | 1932-03-08 | Method and means fob bepbodttcing and tbansmitting pictttbes | ||
US1973726A (en) * | 1934-09-18 | Facsimile transmission | ||
US1790723A (en) * | 1931-02-03 | Facsimile system | ||
US2804574A (en) * | 1943-07-17 | 1957-08-27 | Bell Telephone Labor Inc | Electro-optical system |
NL220780A (fr) * | 1956-09-19 | |||
US3373437A (en) * | 1964-03-25 | 1968-03-12 | Richard G. Sweet | Fluid droplet recorder with a plurality of jets |
US3580995A (en) * | 1968-04-29 | 1971-05-25 | Rca Corp | Constant sized halftone dot image generator |
US3800078A (en) * | 1972-12-18 | 1974-03-26 | Ibm | Digitally compensated scanning system |
US3928718A (en) * | 1973-05-09 | 1975-12-23 | Hitachi Ltd | Image reproducing system |
DE2413034C3 (de) * | 1974-03-19 | 1983-11-17 | Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel | Verfahren und Anordnung zur Vermeidung von Fehlern bei der Reproduktion von Bildvorlagen |
-
1977
- 1977-11-25 US US05/854,803 patent/US4151555A/en not_active Expired - Lifetime
-
1978
- 1978-08-22 CA CA309,830A patent/CA1088998A/fr not_active Expired
- 1978-08-31 NL NL7808935A patent/NL7808935A/xx not_active Application Discontinuation
- 1978-09-19 FR FR7826788A patent/FR2409860A1/fr active Granted
- 1978-10-17 JP JP12779478A patent/JPS5476009A/ja active Granted
- 1978-11-07 GB GB7843536A patent/GB2009559B/en not_active Expired
- 1978-11-17 IT IT69636/78A patent/IT1160939B/it active
- 1978-11-24 DE DE2850924A patent/DE2850924C2/de not_active Expired
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB751909A (en) * | 1953-08-31 | 1956-07-04 | Fairchild Camera Instr Co | Automatic-gain-control system for photoelectric engraving machines |
GB1194717A (en) * | 1966-06-03 | 1970-06-10 | Zeuthen & Aagaard As | Improvements in and relating to a Machine for Perforating a Stencil Electrically |
US3528749A (en) * | 1966-12-09 | 1970-09-15 | Itek Corp | Apparatus for measuring optical density |
FR2046143A5 (fr) * | 1969-03-03 | 1971-03-05 | Mead Corp | |
US3604846A (en) * | 1969-03-03 | 1971-09-14 | Mead Corp | Method and system for reconstruction of half-tone images |
US3613103A (en) * | 1969-07-25 | 1971-10-12 | Alden Res Found | Analog signal modifying apparatus |
Also Published As
Publication number | Publication date |
---|---|
NL7808935A (nl) | 1979-05-29 |
JPS5622186B2 (fr) | 1981-05-23 |
GB2009559B (en) | 1982-04-07 |
DE2850924C2 (de) | 1986-02-13 |
US4151555A (en) | 1979-04-24 |
JPS5476009A (en) | 1979-06-18 |
CA1088998A (fr) | 1980-11-04 |
GB2009559A (en) | 1979-06-13 |
IT1160939B (it) | 1987-03-11 |
IT7869636A0 (it) | 1978-11-17 |
DE2850924A1 (de) | 1979-05-31 |
FR2409860B1 (fr) | 1983-12-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
CL | Concession to grant licences | ||
TP | Transmission of property | ||
ST | Notification of lapse |