JPS561666A - Gamma correcting system for picture input/output device - Google Patents

Gamma correcting system for picture input/output device

Info

Publication number
JPS561666A
JPS561666A JP7739979A JP7739979A JPS561666A JP S561666 A JPS561666 A JP S561666A JP 7739979 A JP7739979 A JP 7739979A JP 7739979 A JP7739979 A JP 7739979A JP S561666 A JPS561666 A JP S561666A
Authority
JP
Japan
Prior art keywords
sent
density
gate
selection
prom7i
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
JP7739979A
Other languages
English (en)
Inventor
Morizumi Kurose
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 JP7739979A priority Critical patent/JPS561666A/ja
Publication of JPS561666A publication Critical patent/JPS561666A/ja
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
    • H04N1/407—Control or modification of tonal gradation or of extreme levels, e.g. background level
    • H04N1/4072—Control or modification of tonal gradation or of extreme levels, e.g. background level dependent on the contents of the original

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Picture Signal Circuits (AREA)
  • Facsimile Image Signal Circuits (AREA)
JP7739979A 1979-06-19 1979-06-19 Gamma correcting system for picture input/output device Pending JPS561666A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7739979A JPS561666A (en) 1979-06-19 1979-06-19 Gamma correcting system for picture input/output device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7739979A JPS561666A (en) 1979-06-19 1979-06-19 Gamma correcting system for picture input/output device

Publications (1)

Publication Number Publication Date
JPS561666A true JPS561666A (en) 1981-01-09

Family

ID=13632809

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7739979A Pending JPS561666A (en) 1979-06-19 1979-06-19 Gamma correcting system for picture input/output device

Country Status (1)

Country Link
JP (1) JPS561666A (ja)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5839168A (ja) * 1981-09-02 1983-03-07 Ricoh Co Ltd ガンマ補正装置
JPS58178667A (ja) * 1982-04-12 1983-10-19 Fujitsu Ltd 信号処理回路
JPS5983469A (ja) * 1982-09-27 1984-05-14 ア−ルシ−エ−　コ−ポレ−シヨン ガンマ補正装置
JPS59163953A (ja) * 1983-03-08 1984-09-17 Canon Inc 画像処理装置
JPS6170666A (ja) * 1984-09-14 1986-04-11 Hitachi Ltd 図形シエ−デイング装置
JPH01188071A (ja) * 1988-12-02 1989-07-27 Matsushita Graphic Commun Syst Inc 画信号補正装置
JPH01218177A (ja) * 1988-02-25 1989-08-31 Sony Corp 撮像信号処理回路
JPH0298784A (ja) * 1988-10-05 1990-04-11 Takano Kk 画像処理による特異点検出装置
JPH0372720A (ja) * 1989-08-11 1991-03-27 Sharp Corp アナログ／デジタル変換装置
JPH04270560A (ja) * 1991-06-14 1992-09-25 Canon Inc 画像処理装置
JPH0583543A (ja) * 1992-03-16 1993-04-02 Konica Corp カラー画像形成装置
JPH07147628A (ja) * 1994-08-22 1995-06-06 Canon Inc 画像処理方法

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5839168A (ja) * 1981-09-02 1983-03-07 Ricoh Co Ltd ガンマ補正装置
JPS58178667A (ja) * 1982-04-12 1983-10-19 Fujitsu Ltd 信号処理回路
JPS5983469A (ja) * 1982-09-27 1984-05-14 ア−ルシ−エ−　コ−ポレ−シヨン ガンマ補正装置
JPH0584104B2 (ja) * 1982-09-27 1993-11-30 Rca Corp
JPS59163953A (ja) * 1983-03-08 1984-09-17 Canon Inc 画像処理装置
JPS6170666A (ja) * 1984-09-14 1986-04-11 Hitachi Ltd 図形シエ−デイング装置
JPH01218177A (ja) * 1988-02-25 1989-08-31 Sony Corp 撮像信号処理回路
JPH0298784A (ja) * 1988-10-05 1990-04-11 Takano Kk 画像処理による特異点検出装置
JPH022348B2 (ja) * 1988-12-02 1990-01-17 Matsushita Graphic Communic
JPH01188071A (ja) * 1988-12-02 1989-07-27 Matsushita Graphic Commun Syst Inc 画信号補正装置
JPH0372720A (ja) * 1989-08-11 1991-03-27 Sharp Corp アナログ／デジタル変換装置
JPH04270560A (ja) * 1991-06-14 1992-09-25 Canon Inc 画像処理装置
JPH0583543A (ja) * 1992-03-16 1993-04-02 Konica Corp カラー画像形成装置
JPH07147628A (ja) * 1994-08-22 1995-06-06 Canon Inc 画像処理方法

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