JPS5558668A - Picture signal processing system - Google Patents

Picture signal processing system

Info

Publication number
JPS5558668A
JPS5558668A JP13118878A JP13118878A JPS5558668A JP S5558668 A JPS5558668 A JP S5558668A JP 13118878 A JP13118878 A JP 13118878A JP 13118878 A JP13118878 A JP 13118878A JP S5558668 A JPS5558668 A JP S5558668A
Authority
JP
Japan
Prior art keywords
picture
character
original
picture quality
region
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
JP13118878A
Other languages
Japanese (ja)
Inventor
Koichi Ejiri
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.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP13118878A priority Critical patent/JPS5558668A/en
Publication of JPS5558668A publication Critical patent/JPS5558668A/en
Pending legal-status Critical Current

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  • Facsimile Image Signal Circuits (AREA)

Abstract

PURPOSE: To eliminate a background density and noise and adjust the picture quality and properly even for originals having a large picture element density change by discriminating the character of original pictures by operation processing to adjust the picture quality.
CONSTITUTION: Information in specific region D1 of original picture 1 is temporarily stored in buffer memory 2 from picture signals of picture element units, and the background density level, dirt, density distribution, maximum and minimum densities, etc., of region D1 are calculated by operation processing unit 3, where a program of simulate operation is previously set, according to stored contents, and the picture signal state in picture element near region D1 is discriminated after grasping the character of this part of the picture on a basis of calculated results, and threshold level set and gradation correction are performed by picture quality adjustment unit 4 according to this discrimination result. Next, the similar operation is performed for D1∼Dn to forecast and discriminate the character of the whole of the original picture. Thus, the picture quality can be improved well.
COPYRIGHT: (C)1980,JPO&Japio
JP13118878A 1978-10-25 1978-10-25 Picture signal processing system Pending JPS5558668A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13118878A JPS5558668A (en) 1978-10-25 1978-10-25 Picture signal processing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13118878A JPS5558668A (en) 1978-10-25 1978-10-25 Picture signal processing system

Publications (1)

Publication Number Publication Date
JPS5558668A true JPS5558668A (en) 1980-05-01

Family

ID=15052066

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13118878A Pending JPS5558668A (en) 1978-10-25 1978-10-25 Picture signal processing system

Country Status (1)

Country Link
JP (1) JPS5558668A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5778275A (en) * 1980-11-01 1982-05-15 Canon Inc Signal processing method
JPS57185446A (en) * 1981-05-12 1982-11-15 Canon Inc Forming method of color picture
JPS5810961A (en) * 1981-07-13 1983-01-21 Canon Inc Binary coding method for picture
JPH0698172A (en) * 1992-12-11 1994-04-08 Nikon Corp Picture reader

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5778275A (en) * 1980-11-01 1982-05-15 Canon Inc Signal processing method
JPS57185446A (en) * 1981-05-12 1982-11-15 Canon Inc Forming method of color picture
JPH037112B2 (en) * 1981-05-12 1991-01-31 Canon Kk
JPS5810961A (en) * 1981-07-13 1983-01-21 Canon Inc Binary coding method for picture
JPH0698172A (en) * 1992-12-11 1994-04-08 Nikon Corp Picture reader

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