JPS57131170A - Picture signal processing device - Google Patents

Picture signal processing device

Info

Publication number
JPS57131170A
JPS57131170A JP56016624A JP1662481A JPS57131170A JP S57131170 A JPS57131170 A JP S57131170A JP 56016624 A JP56016624 A JP 56016624A JP 1662481 A JP1662481 A JP 1662481A JP S57131170 A JPS57131170 A JP S57131170A
Authority
JP
Japan
Prior art keywords
circuit
binary
signal
coding circuit
value
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
JP56016624A
Other languages
Japanese (ja)
Inventor
Keiichi Inoue
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.)
MATSUSHITA DENSOU KIKI KK
Panasonic System Solutions Japan Co Ltd
Original Assignee
MATSUSHITA DENSOU KIKI KK
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 DENSOU KIKI KK, Matsushita Graphic Communication Systems Inc filed Critical MATSUSHITA DENSOU KIKI KK
Priority to JP56016624A priority Critical patent/JPS57131170A/en
Publication of JPS57131170A publication Critical patent/JPS57131170A/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
    • H04N1/40062—Discrimination between different image types, e.g. two-tone, continuous tone

Landscapes

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

Abstract

PURPOSE:To clearly reproduce a fine black and white pattern, by detecting the fine black and white pattern from in an analog picture signal, and switching the fine black and white pattern part to a binary-coded digital signal for black and white binary recording, from a multi-value digital signal. CONSTITUTION:An analog signal from a terminal 15 is inputted to a discriminating circuit 11, a multi-value-coding circuit 12 and a binary-coding circuit 13, respectively. The multi-value-coding circuit 12 converts an analog picture signal to a digital signal of plural bits, and outputs it to a switching circuit 14. Also, the binary-coding circuit 13 converts the analog signal to a digital signal of 1 bit, and outputs it to the switching circuit 14. When a fine black and white pattern is detected by the discriminating circuit 11, the output signal of the binary-coding circuit 13 is converted to plural bits and is outputted from the switching circuit 14. In this state, when the fine pattern comes not to be detected by the discriminating circuit 11, the output signal of the multi-value-coding circuit 12 is outputted.
JP56016624A 1981-02-05 1981-02-05 Picture signal processing device Pending JPS57131170A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56016624A JPS57131170A (en) 1981-02-05 1981-02-05 Picture signal processing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56016624A JPS57131170A (en) 1981-02-05 1981-02-05 Picture signal processing device

Publications (1)

Publication Number Publication Date
JPS57131170A true JPS57131170A (en) 1982-08-13

Family

ID=11921493

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56016624A Pending JPS57131170A (en) 1981-02-05 1981-02-05 Picture signal processing device

Country Status (1)

Country Link
JP (1) JPS57131170A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6048670A (en) * 1983-08-29 1985-03-16 Canon Inc Picture processing device
JPS6066574A (en) * 1983-09-22 1985-04-16 Canon Inc Picture processing device
JPS60204177A (en) * 1984-03-29 1985-10-15 Toshiba Corp Picture signal processor
JPS61169083A (en) * 1985-01-21 1986-07-30 Canon Inc Image processing system
FR2610158A1 (en) * 1987-01-27 1988-07-29 Canon Kk APPARATUS FOR PROCESSING IMAGES

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6048670A (en) * 1983-08-29 1985-03-16 Canon Inc Picture processing device
JPS6066574A (en) * 1983-09-22 1985-04-16 Canon Inc Picture processing device
JPH0510870B2 (en) * 1983-09-22 1993-02-10 Canon Kk
JPS60204177A (en) * 1984-03-29 1985-10-15 Toshiba Corp Picture signal processor
JPS61169083A (en) * 1985-01-21 1986-07-30 Canon Inc Image processing system
FR2610158A1 (en) * 1987-01-27 1988-07-29 Canon Kk APPARATUS FOR PROCESSING IMAGES
US5101282A (en) * 1987-01-27 1992-03-31 Canon Kabushiki Kaisha Variable magnification image

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