CN100382568C - 动态对比度提高的方法 - Google Patents

动态对比度提高的方法 Download PDF

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Publication number
CN100382568C
CN100382568C CNB028212533A CN02821253A CN100382568C CN 100382568 C CN100382568 C CN 100382568C CN B028212533 A CNB028212533 A CN B028212533A CN 02821253 A CN02821253 A CN 02821253A CN 100382568 C CN100382568 C CN 100382568C
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CN
China
Prior art keywords
video
frame
analysis
dynamic contrast
transfer function
Prior art date
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Expired - Lifetime
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CNB028212533A
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English (en)
Chinese (zh)
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CN1575586A (zh
Inventor
保罗·D·菲利曼
托马斯·E·霍兰德
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Thomson Licensing SAS
International Digital Madison Patent Holding SAS
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Thomson Licensing SAS
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Publication of CN1575586A publication Critical patent/CN1575586A/zh
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Publication of CN100382568C publication Critical patent/CN100382568C/zh
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/20—Circuitry for controlling amplitude response
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/431—Generation of visual interfaces for content selection or interaction; Content or additional data rendering
    • H04N21/4318—Generation of visual interfaces for content selection or interaction; Content or additional data rendering by altering the content in the rendering process, e.g. blanking, blurring or masking an image region
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
    • H04N21/44008—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving operations for analysing video streams, e.g. detecting features or characteristics in the video stream
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/57—Control of contrast or brightness
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/066—Adjustment of display parameters for control of contrast

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Picture Signal Circuits (AREA)
  • Television Receiver Circuits (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
CNB028212533A 2001-11-01 2002-10-28 动态对比度提高的方法 Expired - Lifetime CN100382568C (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US33763401P 2001-11-01 2001-11-01
US60/337,634 2001-11-01

Publications (2)

Publication Number Publication Date
CN1575586A CN1575586A (zh) 2005-02-02
CN100382568C true CN100382568C (zh) 2008-04-16

Family

ID=23321343

Family Applications (1)

Application Number Title Priority Date Filing Date
CNB028212533A Expired - Lifetime CN100382568C (zh) 2001-11-01 2002-10-28 动态对比度提高的方法

Country Status (7)

Country Link
US (1) US7064794B2 (https=)
EP (1) EP1446944A4 (https=)
JP (1) JP4420385B2 (https=)
KR (1) KR20050040849A (https=)
CN (1) CN100382568C (https=)
MX (1) MXPA04004197A (https=)
WO (1) WO2003039137A1 (https=)

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US20040255338A1 (en) * 2003-06-13 2004-12-16 Apple Computer, Inc. Interface for sending synchronized audio and video data
US7668099B2 (en) * 2003-06-13 2010-02-23 Apple Inc. Synthesis of vertical blanking signal
TWI234398B (en) * 2003-11-20 2005-06-11 Sunplus Technology Co Ltd Automatic contrast limiting circuit by spatial domain infinite impulse response filter and method thereof
US8922594B2 (en) 2005-06-15 2014-12-30 Sharp Laboratories Of America, Inc. Methods and systems for enhancing display characteristics with high frequency contrast enhancement
US9083969B2 (en) 2005-08-12 2015-07-14 Sharp Laboratories Of America, Inc. Methods and systems for independent view adjustment in multiple-view displays
US8947465B2 (en) 2004-12-02 2015-02-03 Sharp Laboratories Of America, Inc. Methods and systems for display-mode-dependent brightness preservation
US7515160B2 (en) 2006-07-28 2009-04-07 Sharp Laboratories Of America, Inc. Systems and methods for color preservation with image tone scale corrections
US8913089B2 (en) 2005-06-15 2014-12-16 Sharp Laboratories Of America, Inc. Methods and systems for enhancing display characteristics with frequency-specific gain
US7605872B2 (en) * 2005-06-20 2009-10-20 Mediatek Inc. Video contrast adjusting method and system
CN100407765C (zh) * 2005-09-07 2008-07-30 逐点半导体（上海）有限公司 图像对比度增强装置及增强方法
SG138579A1 (en) * 2006-06-26 2008-01-28 Genesis Microchip Inc Universal, highly configurable video and graphic measurement device
US7881547B2 (en) 2006-07-28 2011-02-01 Genesis Microchip Inc. Video window detector
US9330630B2 (en) 2008-08-30 2016-05-03 Sharp Laboratories Of America, Inc. Methods and systems for display source light management with rate change control
US8284232B2 (en) * 2009-01-30 2012-10-09 Hewlett-Packard Development Company, L.P. Equalization of video streams
KR101120700B1 (ko) * 2010-09-02 2012-03-29 삼성메디슨 주식회사 컬러 도플러 모드 영상을 제공하는 초음파 시스템 및 방법
US9338389B2 (en) 2011-10-20 2016-05-10 Dolby Laboratories Licensing Corporation Method and system for video equalization

Citations (3)

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Publication number Priority date Publication date Assignee Title
US4829381A (en) * 1988-04-18 1989-05-09 Polaroid Corporation System and method for electronic image enhancement by dynamic pixel transformation
CN1237850A (zh) * 1998-06-02 1999-12-08 德国汤姆森-布兰特有限公司 对视频图像的对比度进行动态改进所用的方法及设备
US6075574A (en) * 1998-05-22 2000-06-13 Ati Technologies, Inc Method and apparatus for controlling contrast of images

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Publication number Priority date Publication date Assignee Title
FR2575885B1 (fr) 1985-01-04 1987-02-20 Thomson Csf Renforcateur de contraste pour images video
US4628362A (en) * 1985-05-02 1986-12-09 American Dynamics Corporation Combined video AGC and digitizing circuit
JP2521183Y2 (ja) 1987-09-29 1996-12-25 ソニー株式会社 ディジタル信号処理回路
US5099330A (en) 1988-10-28 1992-03-24 Casio Computer Co., Ltd. Contrast control based on mean and deviation values
US5162902A (en) 1991-12-16 1992-11-10 Thomson Consumer Electronics, Inc. Non-linear luminance signal processor responsive to average picture level (APL) of displayed image
US5191420A (en) 1991-12-16 1993-03-02 Thomson Consumer Electronics, Inc. Video system with feedback controlled "white stretch" processing and brightness compensation
SG63564A1 (en) 1992-05-22 1999-03-30 Thomson Consumer Electronics Non-linear video signal processor employing picture element analysis
EP0613294B1 (en) 1993-02-24 1998-10-28 Matsushita Electric Industrial Co., Ltd. Gradation correction device and image sensing device therewith
US5550556A (en) 1993-11-01 1996-08-27 Multivideo Labs, Inc. Transmitting data and commands to display monitors
US5777590A (en) 1995-08-25 1998-07-07 S3, Incorporated Grayscale shading for liquid crystal display panels
JP3130266B2 (ja) 1996-03-09 2001-01-31 三星電子株式会社 平均分離ヒストグラム等化を用いる映像改善方法及びその回路
JP2951910B2 (ja) 1997-03-18 1999-09-20 松下電器産業株式会社 撮像装置の階調補正装置及び階調補正方法
EP0963112B1 (en) 1998-06-02 2004-04-21 Deutsche Thomson-Brandt Gmbh Method and apparatus for dynamic contrast improvement in video pictures

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4829381A (en) * 1988-04-18 1989-05-09 Polaroid Corporation System and method for electronic image enhancement by dynamic pixel transformation
US6075574A (en) * 1998-05-22 2000-06-13 Ati Technologies, Inc Method and apparatus for controlling contrast of images
CN1237850A (zh) * 1998-06-02 1999-12-08 德国汤姆森-布兰特有限公司 对视频图像的对比度进行动态改进所用的方法及设备

Also Published As

Publication number Publication date
EP1446944A4 (en) 2005-01-12
CN1575586A (zh) 2005-02-02
US7064794B2 (en) 2006-06-20
EP1446944A1 (en) 2004-08-18
KR20050040849A (ko) 2005-05-03
JP4420385B2 (ja) 2010-02-24
MXPA04004197A (es) 2004-09-06
WO2003039137A1 (en) 2003-05-08
JP2005509340A (ja) 2005-04-07
US20040207760A1 (en) 2004-10-21

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