IT1109994B - Apparecchiatura di riproduzione perfezionata - Google Patents
Apparecchiatura di riproduzione perfezionataInfo
- Publication number
- IT1109994B IT1109994B IT21402/78A IT2140278A IT1109994B IT 1109994 B IT1109994 B IT 1109994B IT 21402/78 A IT21402/78 A IT 21402/78A IT 2140278 A IT2140278 A IT 2140278A IT 1109994 B IT1109994 B IT 1109994B
- Authority
- IT
- Italy
- Prior art keywords
- perfected
- reproduction equipment
- reproduction
- equipment
- perfected reproduction
- Prior art date
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
- H04N1/41—Bandwidth or redundancy reduction
- H04N1/411—Bandwidth or redundancy reduction for the transmission or storage or reproduction of two-tone pictures, e.g. black and white pictures
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T9/00—Image coding
- G06T9/005—Statistical coding, e.g. Huffman, run length coding
-
- 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
- H04N1/40068—Modification of image resolution, i.e. determining the values of picture elements at new relative positions
-
- 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
- H04N1/4055—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a clustered dots or a size modulated halftone pattern
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Image Processing (AREA)
- Facsimile Image Signal Circuits (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/783,374 US4150400A (en) | 1977-03-31 | 1977-03-31 | Methods of a coarse-scan/fine-print character reproduction with compression |
US05/783,375 US4124870A (en) | 1977-03-31 | 1977-03-31 | Method for improving print quality of coarse-scan/fine-print character reproduction |
Publications (2)
Publication Number | Publication Date |
---|---|
IT7821402A0 IT7821402A0 (it) | 1978-03-21 |
IT1109994B true IT1109994B (it) | 1985-12-23 |
Family
ID=27120131
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT21402/78A IT1109994B (it) | 1977-03-31 | 1978-03-21 | Apparecchiatura di riproduzione perfezionata |
Country Status (6)
Country | Link |
---|---|
BR (1) | BR7802022A (it) |
CH (1) | CH629348A5 (it) |
DE (1) | DE2812821C3 (it) |
FR (1) | FR2386213A1 (it) |
IT (1) | IT1109994B (it) |
NL (1) | NL7803228A (it) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4349846A (en) * | 1979-04-17 | 1982-09-14 | Ricoh Company, Ltd. | Picture processing method |
JPS55162179A (en) * | 1979-06-02 | 1980-12-17 | Ricoh Co Ltd | Picture processing method |
DE3002781A1 (de) * | 1980-01-26 | 1981-07-30 | Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel | Verfahren zur verbesserten bildwiedergabe in der reproduktionstechnik |
US4433912A (en) * | 1982-01-21 | 1984-02-28 | Dr. Ing. Rudolf Hell Gmbh | Method and a circuit for determining a contour in an image |
JPS6038973A (ja) * | 1983-08-11 | 1985-02-28 | Dainippon Screen Mfg Co Ltd | 境界画素の処理方法 |
JPS61203785A (ja) * | 1985-03-07 | 1986-09-09 | Dainippon Screen Mfg Co Ltd | 2値画像デ−タの平滑化処理方法及びその装置 |
US4742399A (en) * | 1985-11-01 | 1988-05-03 | Dainippon Screen Mfg. Co., Ltd. | Method of and apparatus for generating high-resolution bilevel image data |
DE3641592A1 (de) * | 1985-12-06 | 1987-06-11 | Canon Kk | Bilddaten-verarbeitungseinrichtung |
GB8806235D0 (en) * | 1988-03-16 | 1988-04-13 | Pixie Intelligent Computer Sys | Dynamic printing enhancement |
JPH0666880B2 (ja) * | 1988-11-17 | 1994-08-24 | 大日本スクリーン製造株式会社 | 網目版画像形成方法 |
US5122883A (en) * | 1990-03-02 | 1992-06-16 | Xerographic Laser Images Corporation | Raster scanning engine driver which independently locates engine drive signal transitions within each pixel |
US5486927A (en) * | 1991-08-19 | 1996-01-23 | Konica Corporation | Digital image forming apparatus using subdivided pixels |
EP0528618B1 (en) * | 1991-08-21 | 1996-11-06 | Konica Corporation | Image forming apparatus |
US6683702B1 (en) * | 1999-07-07 | 2004-01-27 | Xerox Corporation | Compact-dot reproduction of scanned halftone screens |
JP3927388B2 (ja) | 2000-09-27 | 2007-06-06 | 株式会社リコー | 画像処理装置、画像処理方法及び記録媒体 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2779654A (en) * | 1949-11-08 | 1957-01-29 | Ferranti Ltd | Graphical recording systems |
US3928718A (en) * | 1973-05-09 | 1975-12-23 | Hitachi Ltd | Image reproducing system |
US4032978A (en) * | 1975-01-20 | 1977-06-28 | International Business Machines Corporation | Pseudo halftone print generator and method |
-
1978
- 1978-02-23 FR FR7805799A patent/FR2386213A1/fr active Granted
- 1978-03-15 CH CH280178A patent/CH629348A5/de not_active IP Right Cessation
- 1978-03-21 IT IT21402/78A patent/IT1109994B/it active
- 1978-03-23 DE DE2812821A patent/DE2812821C3/de not_active Expired
- 1978-03-28 NL NL7803228A patent/NL7803228A/xx not_active Application Discontinuation
- 1978-03-31 BR BR7802022A patent/BR7802022A/pt unknown
Also Published As
Publication number | Publication date |
---|---|
BR7802022A (pt) | 1979-04-17 |
FR2386213A1 (fr) | 1978-10-27 |
CH629348A5 (en) | 1982-04-15 |
NL7803228A (nl) | 1978-10-03 |
FR2386213B1 (it) | 1980-08-29 |
IT7821402A0 (it) | 1978-03-21 |
DE2812821A1 (de) | 1978-10-05 |
DE2812821B2 (de) | 1981-07-09 |
DE2812821C3 (de) | 1982-04-08 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
TA | Fee payment date (situation as of event date), data collected since 19931001 |
Effective date: 19940330 |