JPS56152377A - Picture reader - Google Patents

Picture reader

Info

Publication number
JPS56152377A
JPS56152377A JP5592180A JP5592180A JPS56152377A JP S56152377 A JPS56152377 A JP S56152377A JP 5592180 A JP5592180 A JP 5592180A JP 5592180 A JP5592180 A JP 5592180A JP S56152377 A JPS56152377 A JP S56152377A
Authority
JP
Japan
Prior art keywords
signal
sensors
circuit
original
pulse width
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
JP5592180A
Other languages
Japanese (ja)
Other versions
JPH0243394B2 (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 JP5592180A priority Critical patent/JPS56152377A/en
Publication of JPS56152377A publication Critical patent/JPS56152377A/en
Publication of JPH0243394B2 publication Critical patent/JPH0243394B2/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
    • H04N1/58—Edge or detail enhancement; Noise or error suppression, e.g. colour misregistration correction

Abstract

PURPOSE:To prevent a chromatic signal from being mixed into the black information edge of the original, by matching black edges of read signals due to plural sensors to one another to adjust the pulse width of read signals. CONSTITUTION:Original 1 is irradiated by light source 2, and its optical image is focused onto line-shaped sensors 5 and 6 by focusing lens 3. Line information detected by sensors 5 and 6 are outputted successively in time series by clock pulses from clock generating circuit 7 and are amplified by amplifying circuits 8 and 9 and are made binary by comparators 10 and 11. The signal of a long wavelength is latched in D type flip flop 12 and is inputted to delay circuit 13 consisting of the shift register. In respect to the signal of a long wavelength, logical OR between the signal of flip flop 12 and the signal of delay circuit 13 is formed by the OR circuit, and the pulse width is extended.
JP5592180A 1980-04-26 1980-04-26 Picture reader Granted JPS56152377A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5592180A JPS56152377A (en) 1980-04-26 1980-04-26 Picture reader

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5592180A JPS56152377A (en) 1980-04-26 1980-04-26 Picture reader

Publications (2)

Publication Number Publication Date
JPS56152377A true JPS56152377A (en) 1981-11-25
JPH0243394B2 JPH0243394B2 (en) 1990-09-28

Family

ID=13012564

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5592180A Granted JPS56152377A (en) 1980-04-26 1980-04-26 Picture reader

Country Status (1)

Country Link
JP (1) JPS56152377A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2507037A1 (en) * 1981-06-01 1982-12-03 Canon Kk COLOR IMAGE READING APPARATUS
JPS58173978A (en) * 1982-04-06 1983-10-12 Fuji Xerox Co Ltd Three-color copying machine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS541101A (en) * 1977-02-26 1979-01-06 Hell Rudolf Dr Ing Gmbh Method of mixing video signals in photoengraving

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS541101A (en) * 1977-02-26 1979-01-06 Hell Rudolf Dr Ing Gmbh Method of mixing video signals in photoengraving

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2507037A1 (en) * 1981-06-01 1982-12-03 Canon Kk COLOR IMAGE READING APPARATUS
JPS58173978A (en) * 1982-04-06 1983-10-12 Fuji Xerox Co Ltd Three-color copying machine

Also Published As

Publication number Publication date
JPH0243394B2 (en) 1990-09-28

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