JPS56114474A - Multivalued picture reader - Google Patents

Multivalued picture reader

Info

Publication number
JPS56114474A
JPS56114474A JP1660380A JP1660380A JPS56114474A JP S56114474 A JPS56114474 A JP S56114474A JP 1660380 A JP1660380 A JP 1660380A JP 1660380 A JP1660380 A JP 1660380A JP S56114474 A JPS56114474 A JP S56114474A
Authority
JP
Japan
Prior art keywords
read
light
multivalued
picture
binary
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
JP1660380A
Other languages
Japanese (ja)
Inventor
Tetsuo Okubo
Yoshio Arai
Hiroyuki Kataoka
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.)
Fujifilm Business Innovation Corp
Original Assignee
Fuji Xerox 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 Fuji Xerox Co Ltd filed Critical Fuji Xerox Co Ltd
Priority to JP1660380A priority Critical patent/JPS56114474A/en
Publication of JPS56114474A publication Critical patent/JPS56114474A/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
    • H04N1/40056—Circuits for driving or energising particular reading heads or original illumination means

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Facsimile Image Signal Circuits (AREA)

Abstract

PURPOSE:To obtain high-speed operation and high resolution by obtaining a multivalued picture signal from a group of N binary read signals by reading element the light passed through N pieces of attenuators having mutally different attenuation factors. CONSTITUTION:Element 12 taking a binary read of a picture reads the reflected light of the original that corresponds to irradiation light whose intensity is varied by steps to obtain a binary read signal while the threshold level is made constant. Those signals are added together to obtain a multivalued read signal, so that the light and shade of the picture can be read. For a read of the irradiation light, two deflecting filters eight attenuator units 6-1-6-8, for example, have are used and the read is taken by (8+1) stages.
JP1660380A 1980-02-15 1980-02-15 Multivalued picture reader Pending JPS56114474A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1660380A JPS56114474A (en) 1980-02-15 1980-02-15 Multivalued picture reader

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1660380A JPS56114474A (en) 1980-02-15 1980-02-15 Multivalued picture reader

Publications (1)

Publication Number Publication Date
JPS56114474A true JPS56114474A (en) 1981-09-09

Family

ID=11920867

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1660380A Pending JPS56114474A (en) 1980-02-15 1980-02-15 Multivalued picture reader

Country Status (1)

Country Link
JP (1) JPS56114474A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0290548A1 (en) * 1986-11-25 1988-11-17 Zone Technology Digital image acquisition system.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0290548A1 (en) * 1986-11-25 1988-11-17 Zone Technology Digital image acquisition system.

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