DE3672506D1 - Einrichtung zum reduzieren der dynamik der drei farbbildsignale. - Google Patents

Einrichtung zum reduzieren der dynamik der drei farbbildsignale.

Info

Publication number
DE3672506D1
DE3672506D1 DE8686400008T DE3672506T DE3672506D1 DE 3672506 D1 DE3672506 D1 DE 3672506D1 DE 8686400008 T DE8686400008 T DE 8686400008T DE 3672506 T DE3672506 T DE 3672506T DE 3672506 D1 DE3672506 D1 DE 3672506D1
Authority
DE
Germany
Prior art keywords
dynamics
reducing
color image
image signals
signals
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.)
Expired - Fee Related
Application number
DE8686400008T
Other languages
English (en)
Inventor
Serge Soca
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.)
Thomson Video Equipement
Original Assignee
Thomson Video Equipement
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 Thomson Video Equipement filed Critical Thomson Video Equipement
Application granted granted Critical
Publication of DE3672506D1 publication Critical patent/DE3672506D1/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals
    • H04N9/68—Circuits for processing colour signals for controlling the amplitude of colour signals, e.g. automatic chroma control circuits
    • H04N9/69—Circuits for processing colour signals for controlling the amplitude of colour signals, e.g. automatic chroma control circuits for modifying the colour signals by gamma correction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals
    • H04N9/68—Circuits for processing colour signals for controlling the amplitude of colour signals, e.g. automatic chroma control circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Processing Of Color Television Signals (AREA)
DE8686400008T 1985-01-08 1986-01-03 Einrichtung zum reduzieren der dynamik der drei farbbildsignale. Expired - Fee Related DE3672506D1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8500182A FR2575884B1 (fr) 1985-01-08 1985-01-08 Dispositif pour reduire la dynamique de trois signaux de couleur representant une image

Publications (1)

Publication Number Publication Date
DE3672506D1 true DE3672506D1 (de) 1990-08-16

Family

ID=9315070

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8686400008T Expired - Fee Related DE3672506D1 (de) 1985-01-08 1986-01-03 Einrichtung zum reduzieren der dynamik der drei farbbildsignale.

Country Status (6)

Country Link
US (1) US4712132A (de)
EP (1) EP0192497B1 (de)
JP (1) JPH0834597B2 (de)
CA (1) CA1247231A (de)
DE (1) DE3672506D1 (de)
FR (1) FR2575884B1 (de)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4794932A (en) * 1986-03-31 1989-01-03 Kabushiki Kaisha Toshiba Conversion control circuit for image display apparatus
DE3629396C2 (de) * 1986-08-29 1993-12-23 Agfa Gevaert Ag Verfahren zur elektronischen Bildverarbeitung
DE3629403C2 (de) * 1986-08-29 1994-09-29 Agfa Gevaert Ag Verfahren zur Korrektur der Farbsättigung bei der elektronischen Bildverarbeitung
US4975773A (en) * 1989-03-31 1990-12-04 Zenith Electronics Corporation Dynamic range video black level expander
US5023490A (en) * 1989-06-21 1991-06-11 General Electric Company Analog signal compression circuit
JP3057255B2 (ja) * 1989-08-15 2000-06-26 ソニー株式会社 画像処理装置及び画像処理方法
US5099154A (en) * 1989-08-25 1992-03-24 Thomson Consumer Electronics, Inc. Amplifier arrangement for producing a controllable non-linear transfer characteristic useful for improving the contrast of an image
JP2971552B2 (ja) * 1990-10-15 1999-11-08 日本電気ホームエレクトロニクス株式会社 ディスプレイ装置
JP2699711B2 (ja) * 1991-09-17 1998-01-19 松下電器産業株式会社 階調補正方法および装置
JPH0583740A (ja) * 1991-09-20 1993-04-02 Pioneer Electron Corp コンポーネント映像信号伝送装置
US5274439A (en) * 1992-03-31 1993-12-28 Panasonic Technologies, Inc. Apparatus for clipping or limiting color signals to maintain color balance
JPH0795856B2 (ja) * 1992-04-16 1995-10-11 三洋電機株式会社 ディジタルビデオカメラ
US5398077A (en) * 1992-05-19 1995-03-14 Eastman Kodak Company Method for adjusting the luminance of a color signal
US5349390A (en) * 1992-09-22 1994-09-20 U.S. Philips Corporation Picture signal processor for performing both large area and small area contrast reduction, and picture display apparatus incorporating such a picture signal processor
BE1007590A3 (nl) * 1993-10-01 1995-08-16 Philips Electronics Nv Videosignaalverwerkingsschakeling.
JP3134660B2 (ja) * 1994-04-14 2001-02-13 松下電器産業株式会社 色変換方法および色変換装置
JP3366431B2 (ja) * 1994-04-18 2003-01-14 日本フィリップス株式会社 高輝度カラー抑圧回路
JP3408316B2 (ja) * 1994-04-18 2003-05-19 日本フィリップス株式会社 ニー回路
DE19549658B4 (de) * 1994-06-09 2006-02-23 Mitsubishi Denki K.K. Vorrichtung zur Bilddarstellung
US5638138A (en) * 1994-06-09 1997-06-10 Hickman; Charles B. Method for electronic image dynamic range and contrast modification
US5659313A (en) * 1995-03-31 1997-08-19 Panasonic Technologies, Inc. System and method for reducing noise during analog to digital conversion
FR2734116B1 (fr) * 1995-05-12 1997-06-13 France Telecom Procede transmission de signaux de television en couleurs et systeme de codage et de decodage pour la mise en oeuvre de ce procede
EP0801509B1 (de) * 1996-04-12 2006-07-19 Sony Corporation Videokamera, Videosignalverarbeitung, Videosignalkompression, und Videosignalumsetzung
WO1998046015A1 (en) * 1997-04-04 1998-10-15 Haplotech, Inc. System for signal processing the dynamic range and contrast of electronic image brightness with related color modifications
EP1326433B1 (de) 2001-12-29 2012-04-11 Samsung Electronics Co., Ltd. Gerät und Verfahren zur Bildhelligkeitssteuerung
CN1981304A (zh) * 2004-07-05 2007-06-13 皇家飞利浦电子股份有限公司 照相机彩色噪声降低的方法和电路
US20090091660A1 (en) * 2007-10-08 2009-04-09 Yu-Wei Wang Method and apparatus for processing color components of pixel through adding white light adaptively

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3684825A (en) * 1971-02-19 1972-08-15 Rca Corp Contrast compression circuits
JPS5134256A (ja) * 1974-09-17 1976-03-23 Mitsubishi Chem Ind Horiamidososeibutsu
FR2506549A1 (fr) * 1981-05-22 1982-11-26 Thomson Csf Dispositif de correction des informations couleur fournies par les tubes analyseurs d'une camera en vue d'ameliorer la perception des images
FR2538983B1 (fr) * 1982-12-30 1986-02-07 Guichard Jacques Procede de correction de couleur applicable a la prise de vues video et systeme mettant en oeuvre ce procede

Also Published As

Publication number Publication date
US4712132A (en) 1987-12-08
JPS61203790A (ja) 1986-09-09
FR2575884A1 (fr) 1986-07-11
JPH0834597B2 (ja) 1996-03-29
CA1247231A (fr) 1988-12-20
EP0192497A1 (de) 1986-08-27
FR2575884B1 (fr) 1988-07-08
EP0192497B1 (de) 1990-07-11

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee