CN1461572A - 图像信号对比度控制 - Google Patents
图像信号对比度控制 Download PDFInfo
- Publication number
- CN1461572A CN1461572A CN02801126A CN02801126A CN1461572A CN 1461572 A CN1461572 A CN 1461572A CN 02801126 A CN02801126 A CN 02801126A CN 02801126 A CN02801126 A CN 02801126A CN 1461572 A CN1461572 A CN 1461572A
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Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/80—Camera processing pipelines; Components thereof
- H04N23/84—Camera processing pipelines; Components thereof for processing colour signals
- H04N23/86—Camera processing pipelines; Components thereof for processing colour signals for controlling the colour saturation of colour signals, e.g. automatic chroma control circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/77—Circuits for processing the brightness signal and the chrominance signal relative to each other, e.g. adjusting the phase of the brightness signal relative to the colour signal, correcting differential gain or differential phase
-
- 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)
- Controls And Circuits For Display Device (AREA)
- Television Receiver Circuits (AREA)
Abstract
Description
if(x<1)then { [Rout,Gout,Bout]=x*[rin,gin,bin]; }else if(x<xwhite) { [Rout,Gout,Bout]=[rin,gin,bin]+(x-1)*1/(xwhite- 1)*([Rw,Gw,Bw]-[rin,gin,bin]); }else { [Rout,Gout,Bout]=[Rw,Gw,Bw]; }
Claims (14)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP01201334 | 2001-04-11 | ||
EP01201334.8 | 2001-04-11 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN1461572A true CN1461572A (zh) | 2003-12-10 |
CN1305319C CN1305319C (zh) | 2007-03-14 |
Family
ID=8180137
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CNB028011260A Expired - Fee Related CN1305319C (zh) | 2001-04-11 | 2002-04-02 | 图像信号对比度控制 |
Country Status (6)
Country | Link |
---|---|
US (1) | US7050114B2 (zh) |
EP (1) | EP1380177A1 (zh) |
JP (1) | JP4130366B2 (zh) |
KR (1) | KR100911815B1 (zh) |
CN (1) | CN1305319C (zh) |
WO (1) | WO2002085037A1 (zh) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109937444A (zh) * | 2016-11-15 | 2019-06-25 | 夏普株式会社 | 显示装置 |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1380177A1 (en) * | 2001-04-11 | 2004-01-14 | Koninklijke Philips Electronics N.V. | Picture signal contrast control |
WO2004054238A1 (en) * | 2002-12-06 | 2004-06-24 | Koninklijke Philips Electronics N.V. | Gamma correction |
AU2003302968A1 (en) * | 2002-12-13 | 2004-07-09 | Koninklijke Philips Electronics N.V. | Automatic gamma correction for a matrix display |
US20040116796A1 (en) * | 2002-12-17 | 2004-06-17 | Jianying Li | Methods and apparatus for scoring a substance |
KR100497395B1 (ko) * | 2003-06-30 | 2005-06-23 | 삼성전자주식회사 | 화질을 자동으로 설정하는 방법 |
US20070216616A1 (en) * | 2004-06-01 | 2007-09-20 | Koninklijke Philips Electronics, N.V. | Display Device Comprising A Light Source |
JP4496856B2 (ja) * | 2004-06-23 | 2010-07-07 | ノーリツ鋼機株式会社 | 写真画像処理方法及びその装置 |
US8711072B2 (en) * | 2004-09-03 | 2014-04-29 | Entropic Communications, Inc. | Motion blur reduction for LCD video/graphics processors |
TW200612385A (en) * | 2004-10-08 | 2006-04-16 | Mstar Semiconductor Inc | Image contrast enhancing device and method thereof |
US7573533B2 (en) * | 2004-10-15 | 2009-08-11 | Genesis Microchip Inc. | Method of generating transfer curves for adaptive contrast enhancement |
US7760961B2 (en) * | 2004-10-15 | 2010-07-20 | Caba Moldvai | Adaptive contrast enhancement |
US7298379B2 (en) * | 2005-02-10 | 2007-11-20 | Samsung Electronics Co., Ltd. | Luminance preserving color conversion from YUV to RGB |
US7605872B2 (en) * | 2005-06-20 | 2009-10-20 | Mediatek Inc. | Video contrast adjusting method and system |
TW200719731A (en) * | 2005-11-07 | 2007-05-16 | Cheertek Inc | Method for adjusting hue and color saturation by matrix |
TWI350498B (en) * | 2006-03-21 | 2011-10-11 | Himax Tech Ltd | Overdriving value generating apparatus and method |
US8781248B2 (en) * | 2010-01-28 | 2014-07-15 | Stmicroelectronics Asia Pacific Pte. Ltd. | Image details preservation and enhancement |
CN102404533B (zh) * | 2010-09-15 | 2016-06-15 | 罗普特(厦门)科技集团有限公司 | 投影仪及其投影画面色彩校正方法 |
GB2502566A (en) | 2012-05-31 | 2013-12-04 | Ibm | Display brightness adjustment |
WO2016055178A1 (en) | 2014-10-10 | 2016-04-14 | Koninklijke Philips N.V. | Saturation processing specification for dynamic range mappings |
WO2017127457A2 (en) | 2016-01-18 | 2017-07-27 | Waveshift Llc | Evaluating and reducing myopiagenic effects of electronic displays |
Family Cites Families (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5768984A (en) * | 1980-10-16 | 1982-04-27 | Toshiba Corp | Chroma signal processing circuit |
US4941111A (en) * | 1986-04-18 | 1990-07-10 | Advanced Micro Devices, Inc. | Video picking and clipping method and apparatus |
GB8700565D0 (en) * | 1987-01-12 | 1987-02-18 | Crosfield Electronics Ltd | Video image enhancement |
US5089890A (en) | 1989-02-06 | 1992-02-18 | Canon Kabushiki Kaisha | Gamma correction device |
US5079623A (en) * | 1990-04-30 | 1992-01-07 | Thomson Consumer Electronics, Inc. | Signal clamp for a dual function input terminal of a "one-chip" television signal processing IC |
JP2672049B2 (ja) * | 1991-10-09 | 1997-11-05 | 住友ゴム工業株式会社 | 重荷重用タイヤ |
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 |
US5548330A (en) * | 1992-12-24 | 1996-08-20 | Canon Kabushiki Kaisha | Image pickup device for generating a corrected luminance signal |
US5452017A (en) * | 1992-12-31 | 1995-09-19 | Hickman; Charles B. | Method and apparatus for electronic image color modification using hue and saturation levels |
JP2876934B2 (ja) * | 1993-05-31 | 1999-03-31 | 日本電気株式会社 | 画像のコントラスト強調方法及び装置 |
CA2102942C (en) * | 1993-09-10 | 1999-08-03 | Sanford S. Lum | Programmable color space conversion unit |
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 |
JP3263772B2 (ja) * | 1994-06-09 | 2002-03-11 | 三菱電機株式会社 | 映像表示装置 |
FR2749731B1 (fr) * | 1996-06-07 | 2000-08-04 | Thomson Multimedia Sa | Dispositif de regulation de contraste d'image video |
US6360022B1 (en) * | 1997-04-04 | 2002-03-19 | Sarnoff Corporation | Method and apparatus for assessing the visibility of differences between two signal sequences |
JPH11234540A (ja) * | 1998-02-16 | 1999-08-27 | Fujitsu Ltd | 映像信号処理装置 |
US6075574A (en) * | 1998-05-22 | 2000-06-13 | Ati Technologies, Inc | Method and apparatus for controlling contrast of images |
JP3730419B2 (ja) * | 1998-09-30 | 2006-01-05 | シャープ株式会社 | 映像信号処理装置 |
US6177962B1 (en) * | 1999-06-30 | 2001-01-23 | Thomson Licensing S.A. | Apparatus and method for preventing oversaturation of chrominance signals |
KR100661368B1 (ko) * | 1999-12-24 | 2006-12-27 | 삼성전자주식회사 | 영상표시기기에 있어서 영상신호의 게인 조절방법 |
EP1380177A1 (en) * | 2001-04-11 | 2004-01-14 | Koninklijke Philips Electronics N.V. | Picture signal contrast control |
US6778183B1 (en) * | 2002-07-10 | 2004-08-17 | Genesis Microchip Inc. | Method and system for adaptive color and contrast for display devices |
-
2002
- 2002-04-02 EP EP02713160A patent/EP1380177A1/en not_active Ceased
- 2002-04-02 WO PCT/IB2002/001095 patent/WO2002085037A1/en active Application Filing
- 2002-04-02 CN CNB028011260A patent/CN1305319C/zh not_active Expired - Fee Related
- 2002-04-02 KR KR1020027016808A patent/KR100911815B1/ko not_active IP Right Cessation
- 2002-04-02 JP JP2002582633A patent/JP4130366B2/ja not_active Expired - Fee Related
- 2002-04-08 US US10/117,827 patent/US7050114B2/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109937444A (zh) * | 2016-11-15 | 2019-06-25 | 夏普株式会社 | 显示装置 |
CN109937444B (zh) * | 2016-11-15 | 2021-08-31 | 夏普株式会社 | 显示装置 |
Also Published As
Publication number | Publication date |
---|---|
JP4130366B2 (ja) | 2008-08-06 |
WO2002085037A1 (en) | 2002-10-24 |
KR20030019420A (ko) | 2003-03-06 |
CN1305319C (zh) | 2007-03-14 |
EP1380177A1 (en) | 2004-01-14 |
JP2004519972A (ja) | 2004-07-02 |
KR100911815B1 (ko) | 2009-08-12 |
US7050114B2 (en) | 2006-05-23 |
US20030063221A1 (en) | 2003-04-03 |
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Legal Events
Date | Code | Title | Description |
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C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
ASS | Succession or assignment of patent right |
Owner name: NXP CO., LTD. Free format text: FORMER OWNER: ROYAL PHILIPS ELECTRONICS CO., LTD. Effective date: 20071026 |
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C41 | Transfer of patent application or patent right or utility model | ||
TR01 | Transfer of patent right |
Effective date of registration: 20071026 Address after: Holland Ian Deho Finn Patentee after: Koninkl Philips Electronics NV Address before: Holland Ian Deho Finn Patentee before: Koninklike Philips Electronics N. V. |
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ASS | Succession or assignment of patent right |
Owner name: TRIDENT MICROSYSTEMS (FAR EAST)CO., LTD. Free format text: FORMER OWNER: KONINKL PHILIPS ELECTRONICS NV Effective date: 20100819 |
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C41 | Transfer of patent application or patent right or utility model | ||
COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: EINDHOVEN, NETHERLANDS TO: CAYMAN ISLANDS, GRAND CAYMAN ISLAND |
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TR01 | Transfer of patent right |
Effective date of registration: 20100819 Address after: Grand Cayman, Cayman Islands Patentee after: Trident Microsystems (Far East) Ltd. Address before: Holland Ian Deho Finn Patentee before: Koninkl Philips Electronics NV |
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ASS | Succession or assignment of patent right |
Owner name: ENTROPY COMMUNICATION CO., LTD. Free format text: FORMER OWNER: TRIDENT MICROSYSTEMS (FAR EAST) LTD. Effective date: 20130218 |
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C41 | Transfer of patent application or patent right or utility model | ||
TR01 | Transfer of patent right |
Effective date of registration: 20130218 Address after: American California Patentee after: Entropic Communications, Inc. Address before: Grand Cayman, Cayman Islands Patentee before: Trident Microsystems (Far East) Ltd. |
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CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070314 Termination date: 20170402 |
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CF01 | Termination of patent right due to non-payment of annual fee |