DE69313315D1 - Verfahren zur Kontrastkorrektur - Google Patents

Verfahren zur Kontrastkorrektur

Info

Publication number
DE69313315D1
DE69313315D1 DE69313315T DE69313315T DE69313315D1 DE 69313315 D1 DE69313315 D1 DE 69313315D1 DE 69313315 T DE69313315 T DE 69313315T DE 69313315 T DE69313315 T DE 69313315T DE 69313315 D1 DE69313315 D1 DE 69313315D1
Authority
DE
Germany
Prior art keywords
correction method
contrast correction
contrast
correction
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
DE69313315T
Other languages
English (en)
Inventor
Jaap Eduard Blankevoort
Rooy Johannes Henricus Joz Van
Hubertus Cornelis Voet
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.)
Philips Intellectual Property and Standards GmbH
Original Assignee
Philips Patentverwaltung GmbH
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 Philips Patentverwaltung GmbH filed Critical Philips Patentverwaltung GmbH
Priority to DE69313315T priority Critical patent/DE69313315D1/de
Application granted granted Critical
Publication of DE69313315D1 publication Critical patent/DE69313315D1/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
DE69313315T 1992-02-04 1993-01-27 Verfahren zur Kontrastkorrektur Expired - Fee Related DE69313315D1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE69313315T DE69313315D1 (de) 1992-02-04 1993-01-27 Verfahren zur Kontrastkorrektur

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4203092A DE4203092A1 (de) 1992-02-04 1992-02-04 Verfahren zur kontrastkorrektur
DE69313315T DE69313315D1 (de) 1992-02-04 1993-01-27 Verfahren zur Kontrastkorrektur

Publications (1)

Publication Number Publication Date
DE69313315D1 true DE69313315D1 (de) 1997-10-02

Family

ID=6450904

Family Applications (2)

Application Number Title Priority Date Filing Date
DE4203092A Withdrawn DE4203092A1 (de) 1992-02-04 1992-02-04 Verfahren zur kontrastkorrektur
DE69313315T Expired - Fee Related DE69313315D1 (de) 1992-02-04 1993-01-27 Verfahren zur Kontrastkorrektur

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE4203092A Withdrawn DE4203092A1 (de) 1992-02-04 1992-02-04 Verfahren zur kontrastkorrektur

Country Status (4)

Country Link
US (1) US5345277A (de)
EP (1) EP0554938B1 (de)
JP (1) JPH06105186A (de)
DE (2) DE4203092A1 (de)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1007590A3 (nl) * 1993-10-01 1995-08-16 Philips Electronics Nv Videosignaalverwerkingsschakeling.
US6049626A (en) * 1996-10-09 2000-04-11 Samsung Electronics Co., Ltd. Image enhancing method and circuit using mean separate/quantized mean separate histogram equalization and color compensation
US6018588A (en) * 1996-10-09 2000-01-25 Samsung Electronics Co., Ltd. Image enhancement circuit and method using mean matching/quantized mean matching histogram equalization and color compensation
JPH1141618A (ja) * 1997-07-23 1999-02-12 Sony Corp 映像信号処理回路
US6424281B1 (en) * 2000-11-16 2002-07-23 Industrial Technology Research Institute DAC with adjusting digital codes corresponded to reference voltages
JP3838177B2 (ja) * 2002-08-22 2006-10-25 株式会社日立製作所 映像表示方法、映像表示装置及びそれに用いるコントラスト調整回路
JP4808913B2 (ja) * 2003-04-08 2011-11-02 グローバル・オーエルイーディー・テクノロジー・リミテッド・ライアビリティ・カンパニー 表示装置
JP4429796B2 (ja) 2004-05-10 2010-03-10 浜松ホトニクス株式会社 センサ装置
JP4617989B2 (ja) * 2005-04-28 2011-01-26 株式会社日立製作所 映像処理装置
JP5310558B2 (ja) 2007-10-05 2013-10-09 日本電気株式会社 受信装置及びそれを備えた無線通信システム
JP2009124514A (ja) 2007-11-15 2009-06-04 Sony Corp 固体撮像素子、およびカメラシステム

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3970774A (en) * 1975-03-31 1976-07-20 Rca Corporation Electronic signal mixer
NL7714398A (nl) * 1977-12-27 1979-06-29 Philips Nv Schakeling voor het in hoofdzaak nabij een referentieniveau vergroten van een signaal- helling van een periodiek optredend signaal.
JPS56107674A (en) * 1980-01-31 1981-08-26 Sony Corp Gradation correcting device of video signal
US4667228A (en) * 1983-10-14 1987-05-19 Canon Kabushiki Kaisha Image signal processing apparatus
US4757373A (en) * 1985-11-14 1988-07-12 U.S. Philips Corporation Amplifier circuit operative with an adaptive signal compression
EP0235862B1 (de) * 1986-03-07 1991-11-06 Koninklijke Philips Electronics N.V. Gamma-Korrekturschaltung
US4755726A (en) * 1986-09-02 1988-07-05 Tektronix, Inc. XY display transition intensifier
JPS63179685A (ja) * 1987-01-21 1988-07-23 Toshiba Corp 順次走査変換回路
DE3903046A1 (de) * 1989-02-02 1990-08-09 Philips Patentverwaltung Schaltungsanordnung zum einstellen der farbsaettigung
US5134465A (en) * 1989-08-30 1992-07-28 Hitachi Video Engineering, Inc. Color detecting circuit
JPH0822069B2 (ja) * 1989-10-20 1996-03-04 日本ビクター株式会社 カラーディスプレイ装置
CA2040672C (en) * 1990-04-26 1995-05-30 Masaaki Kanashiki Image signal processing apparatus
JPH04152787A (ja) * 1990-10-17 1992-05-26 Olympus Optical Co Ltd 色信号補正装置

Also Published As

Publication number Publication date
DE4203092A1 (de) 1993-08-05
EP0554938B1 (de) 1997-08-27
EP0554938A1 (de) 1993-08-11
US5345277A (en) 1994-09-06
JPH06105186A (ja) 1994-04-15

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Legal Events

Date Code Title Description
8332 No legal effect for de
8370 Indication of lapse of patent is to be deleted
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: PHILIPS CORPORATE INTELLECTUAL PROPERTY GMBH, 2233

8339 Ceased/non-payment of the annual fee