JPS5630360A - Original reader - Google Patents

Original reader

Info

Publication number
JPS5630360A
JPS5630360A JP10506879A JP10506879A JPS5630360A JP S5630360 A JPS5630360 A JP S5630360A JP 10506879 A JP10506879 A JP 10506879A JP 10506879 A JP10506879 A JP 10506879A JP S5630360 A JPS5630360 A JP S5630360A
Authority
JP
Japan
Prior art keywords
signal
level
picture information
original
subtracted
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
JP10506879A
Other languages
Japanese (ja)
Inventor
Soichi Sekimoto
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 JP10506879A priority Critical patent/JPS5630360A/en
Publication of JPS5630360A publication Critical patent/JPS5630360A/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
    • H04N1/409—Edge or detail enhancement; Noise or error suppression

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Combination Of More Than One Step In Electrophotography (AREA)
  • Image Input (AREA)
  • Facsimile Heads (AREA)
  • Facsimile Scanning Arrangements (AREA)

Abstract

PURPOSE:To improve efficiency of irradiation and also to miniaturize a unit by setting the magnitude of a constant-level signal, subtracted from the output signal of a photo-detector according to picture information. CONSTITUTION:When picture information 12 resides on the surface of original 3, relatively high black-level signal (b) is obtained from amplifier 20 and substrated preadjusted constant-level signal (c) by subtracter 22. In this case, setting the level of signal (c) with signal b-c above level 0 obtains signal (f) as picture information. On the other hand, when picture information 12A is on the reverse surface or original 3, a slightly low level black signal is obtained and signal (c) is subtracted from the signal. In this case, the level of signal (c) is so set that signal b-c will be below level 0. Therefore, no read signal appears at output terminal 24.
JP10506879A 1979-08-20 1979-08-20 Original reader Pending JPS5630360A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10506879A JPS5630360A (en) 1979-08-20 1979-08-20 Original reader

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10506879A JPS5630360A (en) 1979-08-20 1979-08-20 Original reader

Publications (1)

Publication Number Publication Date
JPS5630360A true JPS5630360A (en) 1981-03-26

Family

ID=14397629

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10506879A Pending JPS5630360A (en) 1979-08-20 1979-08-20 Original reader

Country Status (1)

Country Link
JP (1) JPS5630360A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6074089A (en) * 1983-09-30 1985-04-26 Toshiba Corp Optical character reader
JPS60109153U (en) * 1983-12-28 1985-07-24 入澤　猛 Graphic reading device
US6197898B1 (en) 1997-11-18 2001-03-06 General Electric Company Melt-mixing thermoplastic and epoxy resin above Tg or Tm of thermoplastic with curing agent

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6074089A (en) * 1983-09-30 1985-04-26 Toshiba Corp Optical character reader
JPS60109153U (en) * 1983-12-28 1985-07-24 入澤　猛 Graphic reading device
US6197898B1 (en) 1997-11-18 2001-03-06 General Electric Company Melt-mixing thermoplastic and epoxy resin above Tg or Tm of thermoplastic with curing agent

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