JPS5530214A - Color picture read method - Google Patents

Color picture read method

Info

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
Application number
JP10277678A
Other languages
Japanese (ja)
Inventor
Koichi Ejiri
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP10277678A priority Critical patent/JPS5530214A/en
Publication of JPS5530214A publication Critical patent/JPS5530214A/en
Pending legal-status Critical Current

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.
JP10277678A 1978-08-25 1978-08-25 Color picture read method Pending JPS5530214A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (12)

* Cited by examiner, † Cited by third party
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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