JPS56152370A - Picture reader - Google Patents

Picture reader

Info

Publication number
JPS56152370A
JPS56152370A JP5607980A JP5607980A JPS56152370A JP S56152370 A JPS56152370 A JP S56152370A JP 5607980 A JP5607980 A JP 5607980A JP 5607980 A JP5607980 A JP 5607980A JP S56152370 A JPS56152370 A JP S56152370A
Authority
JP
Japan
Prior art keywords
black
signals
signal
black signal
read
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
JP5607980A
Other languages
Japanese (ja)
Other versions
JPH0153537B2 (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/en
Publication of JPS56152370A publication Critical patent/JPS56152370A/en
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

Abstract

PURPOSE:To prevent color slippage of the picture and to prevent chromatic ink from overlapping on the black information part, by selectively delaying pluarl read chrominance signals and making them coincident in time series to extract the black signal and by taking out the black from each signal. CONSTITUTION:The reflected light of original 201 which passed through focusing lens 202 is divided into red, green, and blue by dichroic mirrors 203 and 204 and is imaged onto sensors 205-207. Read signals are made binary by comparators 212-213, and transfer routes are selected by discriminating circuit 215 to delay these signals on a basis of the time relative relation of fitting positions of sensors, and the black signal is extracted to terminal 229 by black signal extracting circuit 217. In respect to respective chrominance signals made timing coincident one another, chromatic signals of complementary colors are canceled when the black signal exists, and signals with black taken out are obtained at terminals 230-232.
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 true JPS56152370A (en) 1981-11-25
JPH0153537B2 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)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3336588A1 (en) * 1982-10-08 1984-04-12 Canon K.K., Tokyo COLOR IMAGE PROCESSING DEVICE
JPS59134978A (en) * 1983-01-24 1984-08-02 Nec Corp Color picture input device
JPS59170864A (en) * 1983-03-17 1984-09-27 Canon Inc Color reproducing device
EP0410700A2 (en) * 1989-07-25 1991-01-30 Canon Kabushiki Kaisha Image processing apparatus

Citations (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

Patent Citations (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

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3336588A1 (en) * 1982-10-08 1984-04-12 Canon K.K., Tokyo COLOR IMAGE PROCESSING DEVICE
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
DE3336588C3 (en) * 1982-10-08 1995-04-20 Canon Kk Color image processing device
JPS59134978A (en) * 1983-01-24 1984-08-02 Nec Corp Color picture input device
JPH0534867B2 (en) * 1983-01-24 1993-05-25 Nippon Electric Co
JPS59170864A (en) * 1983-03-17 1984-09-27 Canon Inc Color reproducing device
EP0410700A2 (en) * 1989-07-25 1991-01-30 Canon Kabushiki Kaisha Image processing apparatus
US5555107A (en) * 1989-07-25 1996-09-10 Canon Kabushiki Kaisha Image processing apparatus for judging a color using spatial frequency corrected color component signals

Also Published As

Publication number Publication date
JPH0153537B2 (en) 1989-11-14

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