JPH0142545B2 - - Google Patents

Info

Publication number
JPH0142545B2
JPH0142545B2 JP55156456A JP15645680A JPH0142545B2 JP H0142545 B2 JPH0142545 B2 JP H0142545B2 JP 55156456 A JP55156456 A JP 55156456A JP 15645680 A JP15645680 A JP 15645680A JP H0142545 B2 JPH0142545 B2 JP H0142545B2
Authority
JP
Japan
Prior art keywords
document
background level
photoelectric conversion
original
transmitted
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.)
Expired
Application number
JP55156456A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5780861A (en
Inventor
Hideki Muroya
Yasuo Inoe
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP55156456A priority Critical patent/JPS5780861A/ja
Publication of JPS5780861A publication Critical patent/JPS5780861A/ja
Publication of JPH0142545B2 publication Critical patent/JPH0142545B2/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
    • 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)
  • Facsimile Image Signal Circuits (AREA)
JP55156456A 1980-11-08 1980-11-08 Binary circuit for photoelectric conversion signal Granted JPS5780861A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55156456A JPS5780861A (en) 1980-11-08 1980-11-08 Binary circuit for photoelectric conversion signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55156456A JPS5780861A (en) 1980-11-08 1980-11-08 Binary circuit for photoelectric conversion signal

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP2215701A Division JPH03219779A (ja) 1990-08-17 1990-08-17 ファクシミリ装置

Publications (2)

Publication Number Publication Date
JPS5780861A JPS5780861A (en) 1982-05-20
JPH0142545B2 true JPH0142545B2 (tr) 1989-09-13

Family

ID=15628140

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55156456A Granted JPS5780861A (en) 1980-11-08 1980-11-08 Binary circuit for photoelectric conversion signal

Country Status (1)

Country Link
JP (1) JPS5780861A (tr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4979733A (tr) * 1972-11-13 1974-08-01
JPS5021611A (tr) * 1973-06-25 1975-03-07
JPS5437626A (en) * 1977-08-30 1979-03-20 Sharp Corp Correction system for facsimile read output

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4979733A (tr) * 1972-11-13 1974-08-01
JPS5021611A (tr) * 1973-06-25 1975-03-07
JPS5437626A (en) * 1977-08-30 1979-03-20 Sharp Corp Correction system for facsimile read output

Also Published As

Publication number Publication date
JPS5780861A (en) 1982-05-20

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