JPS5795759A - Picture signal processing device - Google Patents

Picture signal processing device

Info

Publication number
JPS5795759A
JPS5795759A JP55171880A JP17188080A JPS5795759A JP S5795759 A JPS5795759 A JP S5795759A JP 55171880 A JP55171880 A JP 55171880A JP 17188080 A JP17188080 A JP 17188080A JP S5795759 A JPS5795759 A JP S5795759A
Authority
JP
Japan
Prior art keywords
subscanning
picture signal
main
differential coefficient
processing device
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
JP55171880A
Other languages
Japanese (ja)
Other versions
JPH0566066B2 (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 JP55171880A priority Critical patent/JPS5795759A/en
Priority to US06/326,269 priority patent/US4589034A/en
Priority to GB8136687A priority patent/GB2091967B/en
Priority to DE3148129A priority patent/DE3148129C2/en
Priority to DE3153280A priority patent/DE3153280C2/de
Publication of JPS5795759A publication Critical patent/JPS5795759A/en
Priority to GB08420007A priority patent/GB2142802B/en
Priority to US06/789,839 priority patent/US4748677A/en
Publication of JPH0566066B2 publication Critical patent/JPH0566066B2/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

Abstract

PURPOSE:To enable an optimum fog correction toward main and subscanning directions, by increasing a correction coefficient toward the main scanning than that toward the subscanning, in a device processing an output picture signal of a picture reader. CONSTITUTION:In a profile emphasis circuit 5, a differential coefficient M toward a main scanning and a differential coefficient N toward a subscanning are operated independently at multipliers 115, 113. Since the differential coefficient M is set greater than the N, the resolution of a reproduced picture can be coincident toward the main and subscanning, allowing to make optimum fog correction to the respective directions.
JP55171880A 1980-12-05 1980-12-05 Picture signal processing device Granted JPS5795759A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
JP55171880A JPS5795759A (en) 1980-12-05 1980-12-05 Picture signal processing device
US06/326,269 US4589034A (en) 1980-12-05 1981-12-01 Image processing apparatus
GB8136687A GB2091967B (en) 1980-12-05 1981-12-04 Facsimile image processor
DE3148129A DE3148129C2 (en) 1980-12-05 1981-12-04 Image processing device
DE3153280A DE3153280C2 (en) 1980-12-05 1981-12-04
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
JP55171880A JPS5795759A (en) 1980-12-05 1980-12-05 Picture signal processing device

Publications (2)

Publication Number Publication Date
JPS5795759A true JPS5795759A (en) 1982-06-14
JPH0566066B2 JPH0566066B2 (en) 1993-09-21

Family

ID=15931498

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55171880A Granted JPS5795759A (en) 1980-12-05 1980-12-05 Picture signal processing device

Country Status (1)

Country Link
JP (1) JPS5795759A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62252260A (en) * 1986-04-25 1987-11-04 Ricoh Co Ltd Document reader
JPH02234571A (en) * 1989-03-08 1990-09-17 Matsushita Graphic Commun Syst Inc Picture transmitter
JP2002502048A (en) * 1998-01-30 2002-01-22 レオポルト・コスタール・ゲゼルシヤフト・ミト・ベシユレンクテル・ハフツング・ウント・コンパニー・コマンデイトゲゼルシヤフト Method and apparatus for detecting objects above a light-transmitting window glass

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5556760A (en) * 1978-10-21 1980-04-25 Ricoh Co Ltd Picture process system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5556760A (en) * 1978-10-21 1980-04-25 Ricoh Co Ltd Picture process system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62252260A (en) * 1986-04-25 1987-11-04 Ricoh Co Ltd Document reader
JPH02234571A (en) * 1989-03-08 1990-09-17 Matsushita Graphic Commun Syst Inc Picture transmitter
JP2002502048A (en) * 1998-01-30 2002-01-22 レオポルト・コスタール・ゲゼルシヤフト・ミト・ベシユレンクテル・ハフツング・ウント・コンパニー・コマンデイトゲゼルシヤフト Method and apparatus for detecting objects above a light-transmitting window glass

Also Published As

Publication number Publication date
JPH0566066B2 (en) 1993-09-21

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