GB2022352A - Colour printing process previewer - Google Patents
Colour printing process previewerInfo
- Publication number
- GB2022352A GB2022352A GB7901871A GB7901871A GB2022352A GB 2022352 A GB2022352 A GB 2022352A GB 7901871 A GB7901871 A GB 7901871A GB 7901871 A GB7901871 A GB 7901871A GB 2022352 A GB2022352 A GB 2022352A
- Authority
- GB
- United Kingdom
- Prior art keywords
- image signals
- colour
- correcting
- circuit
- image
- 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
- H04N1/46—Colour picture communication systems
- H04N1/56—Processing of colour picture signals
- H04N1/60—Colour correction or control
- H04N1/6011—Colour correction or control with simulation on a subsidiary picture reproducer
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Facsimile Image Signal Circuits (AREA)
- Color Image Communication Systems (AREA)
Abstract
A colour printing process previewer comprises a scanning section for generating Y, M and C image signals by scanning a colour original, a masking circuit for correcting the colour components contained in said image signals, a U.C.R. circuit for subjecting said Y, M and C image signals to the under-colour removal of BI image signal, clip circuits for clipping the portions of said image signals above about 100% level, a gradation correcting circuit for correcting the gradations of said image signals, colour correcting circuits for removing some degree of secondary and tertiary colour components or secondary, tertiary and quaternary colour components that are contained in said Y, M and C image signals, a matrix circuit for converting said Y, M, C, and BI image signals into R, B and G image signals, and a colour monitor for representing the image of said R, B and G image signals on a screen. The scanning section includes a single camera, and the Y, M and C image signals are sequentially obtained by scanning with changing filter elements, the image signals being sequentially memorized into a memory device from which they are read simultaneously.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP434878A JPS5498121A (en) | 1978-01-20 | 1978-01-20 | Color correcting unit |
JP53022054A JPS5947917B2 (en) | 1978-03-01 | 1978-03-01 | File sequential recording method |
Publications (2)
Publication Number | Publication Date |
---|---|
GB2022352A true GB2022352A (en) | 1979-12-12 |
GB2022352B GB2022352B (en) | 1982-07-28 |
Family
ID=26338095
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB8037146A Expired GB2061060B (en) | 1978-01-20 | 1979-01-18 | Colour separation signals masking circuit for colour printer previewer |
GB8037147A Expired GB2061061B (en) | 1978-01-20 | 1979-01-18 | Correcting colour signals for colour printer previewer |
GB7901871A Expired GB2022352B (en) | 1978-01-20 | 1979-01-18 | Colour printing process previewer |
Family Applications Before (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB8037146A Expired GB2061060B (en) | 1978-01-20 | 1979-01-18 | Colour separation signals masking circuit for colour printer previewer |
GB8037147A Expired GB2061061B (en) | 1978-01-20 | 1979-01-18 | Correcting colour signals for colour printer previewer |
Country Status (4)
Country | Link |
---|---|
CH (1) | CH633139A5 (en) |
DE (2) | DE2953088C2 (en) |
GB (3) | GB2061060B (en) |
NL (1) | NL7900451A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2472770A1 (en) * | 1979-12-28 | 1981-07-03 | Dainippon Screen Mfg | COLOR CONTROL SIMULATOR FOR IMAGE REPRODUCING MACHINE |
GB2141001A (en) * | 1983-03-06 | 1984-12-05 | Canon Kk | Digital masking for colour reproduction |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0070677B1 (en) * | 1981-07-14 | 1991-01-09 | Dai Nippon Printing Co., Ltd. | Video printing apparatus |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2123666A (en) | 1936-06-09 | 1938-07-12 | Albert S Samuels Company | Finger ring |
DE1074399B (en) | 1956-11-23 | 1960-01-28 | Miehle Goss Dexter Inc Chi cago 111 (V St A) Vcrtr Dr P Jumus Pat Anw Hannover Waldhausen | Method and device for the photo-mechanical electrical production of corrected color separations |
US2976348A (en) | 1957-05-28 | 1961-03-21 | Hazeltine Research Inc | Electronic previewer for simulating image produced by photochemical processing |
US2981792A (en) | 1957-10-31 | 1961-04-25 | Fairchild Camera Instr Co | Color correction computer for engraving machines |
DE1053311B (en) * | 1958-02-11 | 1959-03-19 | Hell Rudolf Dr Ing Fa | Method and device for electronic color correction |
US3131252A (en) * | 1961-06-05 | 1964-04-28 | Hazeltine Research Inc | Electronic previewer for the graphic arts |
DE1597771C3 (en) * | 1967-07-22 | 1978-09-07 | Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel | Process for the production of corrected color separation signals and color separations |
JPS5438921B2 (en) * | 1974-05-31 | 1979-11-24 | ||
DE2607623B2 (en) * | 1976-02-25 | 1978-12-21 | Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel | Color evaluation device |
-
1979
- 1979-01-18 GB GB8037146A patent/GB2061060B/en not_active Expired
- 1979-01-18 GB GB8037147A patent/GB2061061B/en not_active Expired
- 1979-01-18 GB GB7901871A patent/GB2022352B/en not_active Expired
- 1979-01-19 CH CH58079A patent/CH633139A5/en not_active IP Right Cessation
- 1979-01-19 NL NL7900451A patent/NL7900451A/en not_active Application Discontinuation
- 1979-01-20 DE DE19792953088 patent/DE2953088C2/de not_active Expired
- 1979-01-20 DE DE19792902245 patent/DE2902245C3/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2472770A1 (en) * | 1979-12-28 | 1981-07-03 | Dainippon Screen Mfg | COLOR CONTROL SIMULATOR FOR IMAGE REPRODUCING MACHINE |
GB2141001A (en) * | 1983-03-06 | 1984-12-05 | Canon Kk | Digital masking for colour reproduction |
Also Published As
Publication number | Publication date |
---|---|
DE2902245C3 (en) | 1985-08-22 |
DE2902245A1 (en) | 1979-07-26 |
GB2061060B (en) | 1982-09-02 |
CH633139A5 (en) | 1982-11-15 |
GB2061061A (en) | 1981-05-07 |
NL7900451A (en) | 1979-07-24 |
GB2061061B (en) | 1982-08-11 |
GB2061060A (en) | 1981-05-07 |
DE2953088C2 (en) | 1987-08-27 |
GB2022352B (en) | 1982-07-28 |
DE2902245B2 (en) | 1981-06-25 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19950118 |