JPS56140770A - Picture reader - Google Patents

Picture reader

Info

Publication number
JPS56140770A
JPS56140770A JP4396780A JP4396780A JPS56140770A JP S56140770 A JPS56140770 A JP S56140770A JP 4396780 A JP4396780 A JP 4396780A JP 4396780 A JP4396780 A JP 4396780A JP S56140770 A JPS56140770 A JP S56140770A
Authority
JP
Japan
Prior art keywords
read signal
output signals
constitution
signal
rom11
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.)
Granted
Application number
JP4396780A
Other languages
Japanese (ja)
Other versions
JPS612342B2 (en
Inventor
Tomiji Kubota
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.)
Panasonic System Solutions Japan Co Ltd
Original Assignee
Matsushita Graphic Communication Systems Inc
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 Matsushita Graphic Communication Systems Inc filed Critical Matsushita Graphic Communication Systems Inc
Priority to JP4396780A priority Critical patent/JPS56140770A/en
Publication of JPS56140770A publication Critical patent/JPS56140770A/en
Publication of JPS612342B2 publication Critical patent/JPS612342B2/ja
Granted 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

Landscapes

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

Abstract

PURPOSE:To increase the quality of a picture, by compensating the read signal obtained through a scanner with a constitution including an ROM and at the same time converting the read signal into an n-value coded digital picture. CONSTITUTION:The compairing means 5-7 compare the read signal (a) of the original obtained by a scanner with several different reference voltage level signals (d)-(f). The shift registers 8-10 supply plural output signals of the means 5-7; and the ROM11 supplies the output signals of the registers 8-10. The ROM11 recognizes the output signals of the shift registers as a pattern to give a compensation to the read signal. At the same time, the read signal is converted into an n-value coded digital picture signal. In such constitution, even the white and black thine lines can be delivered in the form of an accurate signal.
JP4396780A 1980-04-02 1980-04-02 Picture reader Granted JPS56140770A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4396780A JPS56140770A (en) 1980-04-02 1980-04-02 Picture reader

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4396780A JPS56140770A (en) 1980-04-02 1980-04-02 Picture reader

Publications (2)

Publication Number Publication Date
JPS56140770A true JPS56140770A (en) 1981-11-04
JPS612342B2 JPS612342B2 (en) 1986-01-24

Family

ID=12678472

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4396780A Granted JPS56140770A (en) 1980-04-02 1980-04-02 Picture reader

Country Status (1)

Country Link
JP (1) JPS56140770A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5897964A (en) * 1981-12-07 1983-06-10 Nec Corp Quantizing device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5897964A (en) * 1981-12-07 1983-06-10 Nec Corp Quantizing device

Also Published As

Publication number Publication date
JPS612342B2 (en) 1986-01-24

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