JPH0153537B2 - - Google Patents

Info

Publication number
JPH0153537B2
JPH0153537B2 JP55056079A JP5607980A JPH0153537B2 JP H0153537 B2 JPH0153537 B2 JP H0153537B2 JP 55056079 A JP55056079 A JP 55056079A JP 5607980 A JP5607980 A JP 5607980A JP H0153537 B2 JPH0153537 B2 JP H0153537B2
Authority
JP
Japan
Prior art keywords
signal
color
black
circuit
red
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
JP55056079A
Other languages
English (en)
Japanese (ja)
Other versions
JPS56152370A (en
Inventor
Motoharu Fujii
Noboru Yukimura
Koji Sato
Naoki Ayada
Seiji Saito
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.)
Canon Inc
Original Assignee
Canon 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 Canon Inc filed Critical Canon Inc
Priority to JP5607980A priority Critical patent/JPS56152370A/ja
Publication of JPS56152370A publication Critical patent/JPS56152370A/ja
Publication of JPH0153537B2 publication Critical patent/JPH0153537B2/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
    • H04N1/46—Colour picture communication systems
    • H04N1/56—Processing of colour picture signals
    • H04N1/60—Colour correction or control
    • H04N1/6016—Conversion to subtractive colour signals
    • H04N1/6022—Generating a fourth subtractive colour signal, e.g. under colour removal, black masking

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Color Image Communication Systems (AREA)
JP5607980A 1980-04-26 1980-04-26 Picture reader Granted JPS56152370A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5607980A JPS56152370A (en) 1980-04-26 1980-04-26 Picture reader

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5607980A JPS56152370A (en) 1980-04-26 1980-04-26 Picture reader

Publications (2)

Publication Number Publication Date
JPS56152370A JPS56152370A (en) 1981-11-25
JPH0153537B2 true JPH0153537B2 (en]) 1989-11-14

Family

ID=13017071

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5607980A Granted JPS56152370A (en) 1980-04-26 1980-04-26 Picture reader

Country Status (1)

Country Link
JP (1) JPS56152370A (en])

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4642681A (en) * 1982-10-08 1987-02-10 Canon Kabushiki Kaisha Color image processing apparatus for generating color output signals and a black output signal in a mutually exclusive manner
JPS59134978A (ja) * 1983-01-24 1984-08-02 Nec Corp カラ−画像入力装置
JPH0793685B2 (ja) * 1983-03-17 1995-10-09 キヤノン株式会社 画像処理装置
EP0410700B1 (en) * 1989-07-25 1996-09-25 Canon Kabushiki Kaisha Image processing apparatus

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54117617A (en) * 1978-03-03 1979-09-12 Mitsubishi Electric Corp Two-color original reader

Also Published As

Publication number Publication date
JPS56152370A (en) 1981-11-25

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