JPS5530214A - Color picture read method - Google Patents
Color picture read methodInfo
- Publication number
- JPS5530214A JPS5530214A JP10277678A JP10277678A JPS5530214A JP S5530214 A JPS5530214 A JP S5530214A JP 10277678 A JP10277678 A JP 10277678A JP 10277678 A JP10277678 A JP 10277678A JP S5530214 A JPS5530214 A JP S5530214A
- Authority
- JP
- Japan
- Prior art keywords
- light sources
- color
- time
- color picture
- several light
- 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.)
- Pending
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
- H04N1/48—Picture signal generators
- H04N1/482—Picture signal generators using the same detector device sequentially for different colour components
- H04N1/484—Picture signal generators using the same detector device sequentially for different colour components with sequential colour illumination of the original
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Facsimile Scanning Arrangements (AREA)
- Color Image Communication Systems (AREA)
Abstract
PURPOSE:To improve color reproducibility without using an expensive optical system hard to adjust, by reading color information by lighting several light sources with different wave length distributions in sequence at constant intervals of time. CONSTITUTION:Several light sources with different wavelength distributions, e.g., three primary color light sources 1, 2 and 3 of blue, red and green are sequentially lighted, one by one, for time of DELTAt, theregy illuminating part P of original 4. Then, images differing in color are formed on image sensor 6 by image-forming lens 5 to obtain a picture signal.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10277678A JPS5530214A (en) | 1978-08-25 | 1978-08-25 | Color picture read method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10277678A JPS5530214A (en) | 1978-08-25 | 1978-08-25 | Color picture read method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5530214A true JPS5530214A (en) | 1980-03-04 |
Family
ID=14336545
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10277678A Pending JPS5530214A (en) | 1978-08-25 | 1978-08-25 | Color picture read method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5530214A (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4318122A (en) * | 1980-10-06 | 1982-03-02 | International Business Machines Corporation | Electronic color separation |
DE3203796A1 (en) * | 1981-02-05 | 1982-09-02 | Canon K.K., Tokyo | COLOR TEMPLATE READER |
JPS5821974A (en) * | 1981-08-03 | 1983-02-09 | Nippon Telegr & Teleph Corp <Ntt> | Color original reader |
EP0150142A2 (en) * | 1984-01-10 | 1985-07-31 | Sharp Kabushiki Kaisha | Color-picture analyzing apparatus with red-purpose and green-purpose filters |
EP0165550A2 (en) * | 1984-06-15 | 1985-12-27 | Sharp Kabushiki Kaisha | Color image reading apparatus |
EP0169383A2 (en) * | 1984-06-22 | 1986-01-29 | Sharp Kabushiki Kaisha | Image reader |
US4652913A (en) * | 1983-04-11 | 1987-03-24 | Fuji Xerox Co., Ltd. | Method and apparatus for reading color images using a plurality of color light sources in which one of the light sources is turned on continuously |
US4658289A (en) * | 1984-01-12 | 1987-04-14 | Sharp Kabushiki Kaisha | Color-picture analyzing apparatus for continuously switching-on green lamp and for alternatively switching-on blue and red-purpose lamps |
US4731661A (en) * | 1984-11-16 | 1988-03-15 | Sharp Kabushiki Kaisha | Color document reader with white balance adjuster for determining light emission periods for a plurality of different-colored light sources and corresponding integration times for a light sensor by reading a white reference area |
-
1978
- 1978-08-25 JP JP10277678A patent/JPS5530214A/en active Pending
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4318122A (en) * | 1980-10-06 | 1982-03-02 | International Business Machines Corporation | Electronic color separation |
DE3203796A1 (en) * | 1981-02-05 | 1982-09-02 | Canon K.K., Tokyo | COLOR TEMPLATE READER |
DE3203796C2 (en) * | 1981-02-05 | 1985-05-23 | Canon K.K., Tokio/Tokyo | Color template reader |
JPS5821974A (en) * | 1981-08-03 | 1983-02-09 | Nippon Telegr & Teleph Corp <Ntt> | Color original reader |
US4652913A (en) * | 1983-04-11 | 1987-03-24 | Fuji Xerox Co., Ltd. | Method and apparatus for reading color images using a plurality of color light sources in which one of the light sources is turned on continuously |
EP0150142A2 (en) * | 1984-01-10 | 1985-07-31 | Sharp Kabushiki Kaisha | Color-picture analyzing apparatus with red-purpose and green-purpose filters |
US4670779A (en) * | 1984-01-10 | 1987-06-02 | Sharp Kabushiki Kaisha | Color-picture analyzing apparatus with red-purpose and green-purpose filters |
EP0150142B1 (en) * | 1984-01-10 | 1991-03-13 | Sharp Kabushiki Kaisha | Color-picture analyzing apparatus with red-purpose and green-purpose filters |
US4658289A (en) * | 1984-01-12 | 1987-04-14 | Sharp Kabushiki Kaisha | Color-picture analyzing apparatus for continuously switching-on green lamp and for alternatively switching-on blue and red-purpose lamps |
EP0165550A2 (en) * | 1984-06-15 | 1985-12-27 | Sharp Kabushiki Kaisha | Color image reading apparatus |
EP0169383A2 (en) * | 1984-06-22 | 1986-01-29 | Sharp Kabushiki Kaisha | Image reader |
US4731661A (en) * | 1984-11-16 | 1988-03-15 | Sharp Kabushiki Kaisha | Color document reader with white balance adjuster for determining light emission periods for a plurality of different-colored light sources and corresponding integration times for a light sensor by reading a white reference area |
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