JPS5795760A - Picture signal processing circuit - Google Patents

Picture signal processing circuit

Info

Publication number
JPS5795760A
JPS5795760A JP55171881A JP17188180A JPS5795760A JP S5795760 A JPS5795760 A JP S5795760A JP 55171881 A JP55171881 A JP 55171881A JP 17188180 A JP17188180 A JP 17188180A JP S5795760 A JPS5795760 A JP S5795760A
Authority
JP
Japan
Prior art keywords
digital value
picture signal
signal processing
processing circuit
comparator
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
JP55171881A
Other languages
Japanese (ja)
Other versions
JPH0566067B2 (en
Inventor
Yoshikazu Yokomizo
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 JP55171881A priority Critical patent/JPS5795760A/en
Priority to US06/326,269 priority patent/US4589034A/en
Priority to DE3148129A priority patent/DE3148129C2/en
Priority to DE3153280A priority patent/DE3153280C2/de
Priority to GB8136687A priority patent/GB2091967B/en
Publication of JPS5795760A publication Critical patent/JPS5795760A/en
Priority to GB08420007A priority patent/GB2142802B/en
Priority to US06/789,839 priority patent/US4748677A/en
Publication of JPH0566067B2 publication Critical patent/JPH0566067B2/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
    • H04N1/401—Compensating positionally unequal response of the pick-up or reproducing head

Landscapes

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

Abstract

PURPOSE:To avoid poor reproduced pictures where noise or the like is emphasized, by emphasizing profile of an output of a limiter circuit, in a picture signal processor processing picture signals for profile emphasis. CONSTITUTION:An analog picture signal is converted into a digital value having a plurality of bits, a digital value of the 1st specified digital value or less set to a preset switch 79 at a limiter circuit is made coincident with a minimum digital value at a comparator 78, and a digital value of the 2nd specified digital value or more set to a preset switch 71 is made coincident with a maximum digital value at a comparator. Thus, noise at white and black background of pictures can be rejected and waveforms subjected to ease of emphasis can be obtained.
JP55171881A 1980-12-05 1980-12-05 Picture signal processing circuit Granted JPS5795760A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
JP55171881A JPS5795760A (en) 1980-12-05 1980-12-05 Picture signal processing circuit
US06/326,269 US4589034A (en) 1980-12-05 1981-12-01 Image processing apparatus
DE3148129A DE3148129C2 (en) 1980-12-05 1981-12-04 Image processing device
DE3153280A DE3153280C2 (en) 1980-12-05 1981-12-04
GB8136687A GB2091967B (en) 1980-12-05 1981-12-04 Facsimile image processor
GB08420007A GB2142802B (en) 1980-12-05 1984-08-06 Facsimile image processor
US06/789,839 US4748677A (en) 1980-12-05 1985-10-21 Image processing apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55171881A JPS5795760A (en) 1980-12-05 1980-12-05 Picture signal processing circuit

Publications (2)

Publication Number Publication Date
JPS5795760A true JPS5795760A (en) 1982-06-14
JPH0566067B2 JPH0566067B2 (en) 1993-09-21

Family

ID=15931517

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55171881A Granted JPS5795760A (en) 1980-12-05 1980-12-05 Picture signal processing circuit

Country Status (1)

Country Link
JP (1) JPS5795760A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6072085A (en) * 1983-09-28 1985-04-24 Toshiba Corp Picture contour emphasizing device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6072085A (en) * 1983-09-28 1985-04-24 Toshiba Corp Picture contour emphasizing device

Also Published As

Publication number Publication date
JPH0566067B2 (en) 1993-09-21

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