JPS55135468A - Shading correcting system - Google Patents

Shading correcting system

Info

Publication number
JPS55135468A
JPS55135468A JP4318579A JP4318579A JPS55135468A JP S55135468 A JPS55135468 A JP S55135468A JP 4318579 A JP4318579 A JP 4318579A JP 4318579 A JP4318579 A JP 4318579A JP S55135468 A JPS55135468 A JP S55135468A
Authority
JP
Japan
Prior art keywords
signal
divider
output signal
solid state
sensor
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
JP4318579A
Other languages
Japanese (ja)
Inventor
Masaaki Mori
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 JP4318579A priority Critical patent/JPS55135468A/en
Publication of JPS55135468A publication Critical patent/JPS55135468A/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
    • H04N1/40—Picture signal circuits
    • H04N1/401—Compensating positionally unequal response of the pick-up or reproducing head

Abstract

PURPOSE:To attain the shading correction with a low-cost device by securing the image formation for the reflected light from the white color diffusion plate onto the exclusive solid state line image sensor of a low resolution and then using the output signal for the shading correction signal. CONSTITUTION:The driving signal from generator SG of the driving signal is supplied to the 1st solid state line image sensor IS1 via driving circuit DR1; and the driving signal from generator SG is supplied to the 2nd solid state line image sensor IS2 via driving circuit DR2 after divided by I/N divider Div. Then the output signal of sensor IS1 is amplified by amplifier A1 and then applied to divider 9 as the dividend signal; and the output signal of sensor IS2 is amplified by amplifier A2 and then applied to divider 9 as the dividend signal. Thus the picture information signal is transmitted with no shading and in the form of the output signal of divider 9.
JP4318579A 1979-04-10 1979-04-10 Shading correcting system Pending JPS55135468A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4318579A JPS55135468A (en) 1979-04-10 1979-04-10 Shading correcting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4318579A JPS55135468A (en) 1979-04-10 1979-04-10 Shading correcting system

Publications (1)

Publication Number Publication Date
JPS55135468A true JPS55135468A (en) 1980-10-22

Family

ID=12656842

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4318579A Pending JPS55135468A (en) 1979-04-10 1979-04-10 Shading correcting system

Country Status (1)

Country Link
JP (1) JPS55135468A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58196758A (en) * 1982-05-12 1983-11-16 Hitachi Ltd Photodetecting element
JPS6040158U (en) * 1983-08-25 1985-03-20 日本電気株式会社 Original detection mechanism
US4679073A (en) * 1982-10-27 1987-07-07 Canon Kabushiki Kaisha Color image reading apparatus with white balance system for controlling the intensity of a light source illuminating a color document

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58196758A (en) * 1982-05-12 1983-11-16 Hitachi Ltd Photodetecting element
JPH0586105B2 (en) * 1982-05-12 1993-12-09 Hitachi Ltd
US4679073A (en) * 1982-10-27 1987-07-07 Canon Kabushiki Kaisha Color image reading apparatus with white balance system for controlling the intensity of a light source illuminating a color document
JPS6040158U (en) * 1983-08-25 1985-03-20 日本電気株式会社 Original detection mechanism

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