JPS574659A - Picture signal correcting device - Google Patents

Picture signal correcting device

Info

Publication number
JPS574659A
JPS574659A JP7861680A JP7861680A JPS574659A JP S574659 A JPS574659 A JP S574659A JP 7861680 A JP7861680 A JP 7861680A JP 7861680 A JP7861680 A JP 7861680A JP S574659 A JPS574659 A JP S574659A
Authority
JP
Japan
Prior art keywords
picture signal
binary coded
comparator
white
photoelectric transducer
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
JP7861680A
Other languages
Japanese (ja)
Inventor
Akitsugu Yamada
Toshiaki Fujii
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 JP7861680A priority Critical patent/JPS574659A/en
Publication of JPS574659A publication Critical patent/JPS574659A/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
    • H04N1/403—Discrimination between the two tones in the picture signal of a two-tone original

Landscapes

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

Abstract

PURPOSE:To compensate the shortage of image resolution for a solid state photoelectric transducer, by binary coding the analog signal delivered from the photoelectric transducer at the 1st and 2nd threshold levels and then synthesizing these binary coded signals. CONSTITUTION:An analog picture signal (a) supplied through a read signal input terminal 1 is binary coded (b) by a comparator 2 having a threshold level of VRA and drifted toward white and also binary coded (c) by a comparator 3 having a threshold level of VRB and drifted toward black. Then a white information of a low level is formed at a NAND gate 11 and then synthesized with a white information of a high level through an AND gate 7 to be transmitted through an output terminal 13 in the form of a compensated picture signal.
JP7861680A 1980-06-10 1980-06-10 Picture signal correcting device Pending JPS574659A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7861680A JPS574659A (en) 1980-06-10 1980-06-10 Picture signal correcting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7861680A JPS574659A (en) 1980-06-10 1980-06-10 Picture signal correcting device

Publications (1)

Publication Number Publication Date
JPS574659A true JPS574659A (en) 1982-01-11

Family

ID=13666813

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7861680A Pending JPS574659A (en) 1980-06-10 1980-06-10 Picture signal correcting device

Country Status (1)

Country Link
JP (1) JPS574659A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6037879A (en) * 1983-08-10 1985-02-27 Canon Inc Binary coding circuit
JPS6037880A (en) * 1983-08-10 1985-02-27 Canon Inc Binary coding circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6037879A (en) * 1983-08-10 1985-02-27 Canon Inc Binary coding circuit
JPS6037880A (en) * 1983-08-10 1985-02-27 Canon Inc Binary coding circuit

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