JPS56107674A - Gradation correcting device of video signal - Google Patents

Gradation correcting device of video signal

Info

Publication number
JPS56107674A
JPS56107674A JP1066780A JP1066780A JPS56107674A JP S56107674 A JPS56107674 A JP S56107674A JP 1066780 A JP1066780 A JP 1066780A JP 1066780 A JP1066780 A JP 1066780A JP S56107674 A JPS56107674 A JP S56107674A
Authority
JP
Japan
Prior art keywords
circuit
video signal
apl
input
output
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.)
Granted
Application number
JP1066780A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0139267B2 (enExample
Inventor
Takafumi Okada
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to JP1066780A priority Critical patent/JPS56107674A/ja
Priority to CA000369624A priority patent/CA1164994A/en
Priority to US06/230,394 priority patent/US4489349A/en
Publication of JPS56107674A publication Critical patent/JPS56107674A/ja
Publication of JPH0139267B2 publication Critical patent/JPH0139267B2/ja
Granted legal-status Critical Current

Links

Classifications

    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Picture Signal Circuits (AREA)
  • Television Receiver Circuits (AREA)
JP1066780A 1980-01-31 1980-01-31 Gradation correcting device of video signal Granted JPS56107674A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP1066780A JPS56107674A (en) 1980-01-31 1980-01-31 Gradation correcting device of video signal
CA000369624A CA1164994A (en) 1980-01-31 1981-01-29 Video brightness control circuit
US06/230,394 US4489349A (en) 1980-01-31 1981-02-02 Video brightness control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1066780A JPS56107674A (en) 1980-01-31 1980-01-31 Gradation correcting device of video signal

Publications (2)

Publication Number Publication Date
JPS56107674A true JPS56107674A (en) 1981-08-26
JPH0139267B2 JPH0139267B2 (enExample) 1989-08-18

Family

ID=11756586

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1066780A Granted JPS56107674A (en) 1980-01-31 1980-01-31 Gradation correcting device of video signal

Country Status (3)

Country Link
US (1) US4489349A (enExample)
JP (1) JPS56107674A (enExample)
CA (1) CA1164994A (enExample)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61258567A (ja) * 1985-05-13 1986-11-15 Hitachi Denshi Ltd デイジタル映像信号処理方式
US5049989A (en) * 1990-01-04 1991-09-17 Olympus Optical Co., Ltd. Method and circuit for reducing the influence of a bright image area in an endoscope image signal
US5068719A (en) * 1989-06-07 1991-11-26 Olympus Optical Co., Ltd. Endoscope photometric apparatus
JPH0437263A (ja) * 1990-05-31 1992-02-07 Matsushita Electric Ind Co Ltd 階調補正装置
JPH0440170A (ja) * 1990-06-05 1992-02-10 Matsushita Electric Ind Co Ltd 映像信号の黒レベル補正装置
JPH11327496A (ja) * 1998-03-12 1999-11-26 Sony Corp 表示装置
US7737963B2 (en) 2001-09-27 2010-06-15 Samsung Electronics Co., Ltd. Liquid crystal display having gray voltages with varying magnitudes and driving method thereof

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JPS61234683A (ja) * 1985-04-10 1986-10-18 Fuji Photo Film Co Ltd フイ−ルド／フレ−ム変換におけるフリツカ防止回路
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FR2596941B1 (fr) * 1986-04-04 1988-06-17 Sfena Procede et dispositif de correction gamma pour tube cathodique multichrome
US4855830A (en) * 1987-03-30 1989-08-08 Allen-Bradley Company, Inc. Machine vision system with illumination variation compensation
JPS63290539A (ja) * 1987-05-22 1988-11-28 Olympus Optical Co Ltd 内視鏡用画像入力装置
JP2527592B2 (ja) * 1988-02-25 1996-08-28 三洋電機株式会社 撮像装置
JPH01196978A (ja) * 1988-01-30 1989-08-08 Fuji Photo Film Co Ltd 書類撮影用ビデオカメラ
KR910006375B1 (ko) * 1988-03-17 1991-08-21 삼성전자 주식회사 오토 매스터 페데스털 조정회로
US4829381A (en) * 1988-04-18 1989-05-09 Polaroid Corporation System and method for electronic image enhancement by dynamic pixel transformation
JP2833652B2 (ja) * 1988-07-15 1998-12-09 株式会社ヤマトヤ商会 カラーテレビジヨンの画像処理方法及びその装置
US5068718A (en) * 1988-11-04 1991-11-26 Fuji Photo Film Co., Ltd. Image quality correcting system for use with an imaging apparatus
MY105210A (en) * 1989-03-07 1994-08-30 Sony Corp Television image display apparatus.
US4984085A (en) * 1989-08-03 1991-01-08 Allen-Bradley Company, Inc. Image processor with dark current compensation
US5003394A (en) * 1989-08-25 1991-03-26 Rca Licensing Corporation Dynamic video system including automatic contrast and "white-stretch" processing sections
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
US5070405A (en) * 1989-09-19 1991-12-03 Nikon Corporation Electronic still camera with multi-area light metering and gray scale modification
US5010410A (en) * 1989-10-16 1991-04-23 Eastman Kodak Company Method and apparatus for signal companding
JP3033587B2 (ja) * 1989-11-10 2000-04-17 ソニー株式会社 自動画質調整装置
US5164833A (en) * 1989-11-15 1992-11-17 Konica Corporation Electronic viewfinder
US5065443A (en) * 1989-12-04 1991-11-12 Allen-Bradley Company, Inc. Image processor with illumination variation compensation
CA2040672C (en) * 1990-04-26 1995-05-30 Masaaki Kanashiki Image signal processing apparatus
US5210606A (en) * 1990-04-30 1993-05-11 Thomson Consumer Electronics, Inc. Apparatus for correcting distorted sync in a composite video signal
MY105454A (en) * 1990-04-30 1994-10-31 Thomson Comsumer Electronics Inc Television signal processing circuits.
US5272522A (en) * 1990-04-30 1993-12-21 Thomson Consumer Electronics, Inc. Video signal processing circuits
US5396300A (en) * 1990-05-31 1995-03-07 Matsushita Electric Industrial Co., Ltd. Contrast correction device for correcting video signal contrast by varying luminance signal
US5257108A (en) * 1990-08-06 1993-10-26 Koji Muraoka Video signal processing circuit for improving contrast for an LCD display
US6546131B1 (en) * 1990-12-19 2003-04-08 Canon Kabushiki Kaisha Image processing method and apparatus for achieving tone reproduction suited to the image
NL9100174A (nl) * 1991-02-01 1992-09-01 Philips Nv Kleurenbeeld-weergeefinrichting en kleurencamera.
US5202763A (en) * 1991-05-06 1993-04-13 Thomson Consumer Electronics, Inc. Television receiver with partially by-passed non-linear luminance signal processor
US5191420A (en) * 1991-12-16 1993-03-02 Thomson Consumer Electronics, Inc. Video system with feedback controlled "white stretch" processing and brightness compensation
DE4203092A1 (de) * 1992-02-04 1993-08-05 Philips Patentverwaltung Verfahren zur kontrastkorrektur
SG63564A1 (en) * 1992-05-22 1999-03-30 Thomson Consumer Electronics Non-linear video signal processor employing picture element analysis
US5764287A (en) * 1992-08-31 1998-06-09 Canon Kabushiki Kaisha Image pickup apparatus with automatic selection of gamma correction valve
US5760843A (en) * 1993-01-19 1998-06-02 Matsushita Electric Industrial Co., Ltd. Method and apparatus for contrast processing a video signal including brightness level compensation
TW269766B (enExample) * 1993-02-05 1996-02-01 Thomson Consumer Electronics
US5394195A (en) * 1993-06-14 1995-02-28 Philips Electronics North America Corporation Method and apparatus for performing dynamic gamma contrast control
DE69421121T2 (de) * 1993-06-30 2000-04-13 Nec Corp., Tokio/Tokyo Farbvideokamera mit Gradationsverbesserung des dunklen Signalpegels
US5572256A (en) * 1993-07-20 1996-11-05 Kabushiki Kaisha Toshiba Solid-state imaging apparatus
KR0142290B1 (ko) * 1993-11-24 1998-06-15 김광호 장면적응 영상개선방법 및 그 회로
JP3291694B2 (ja) * 1994-04-25 2002-06-10 富士写真フイルム株式会社 ネガ撮像装置におけるノイズ除去回路
JP3685575B2 (ja) * 1997-01-30 2005-08-17 三菱電機株式会社 ディスプレイ装置
JP3852956B2 (ja) * 1997-03-06 2006-12-06 松下電器産業株式会社 ガンマ補正装置
US5900918A (en) * 1997-07-30 1999-05-04 Hughes-Jvc Technology Corporation Adjustable video gamma circuit
US7154563B1 (en) * 1998-04-30 2006-12-26 Stmicroelectronics Asia Pacific Pte Ltd. Automatic brightness limitation for avoiding video signal clipping
EP0967809A1 (en) * 1998-06-22 1999-12-29 Deutsche Thomson-Brandt Gmbh Gamma matching of a video processor by means of three measured currents
US6441870B1 (en) 1998-12-22 2002-08-27 Gateway, Inc. Automatic gamma correction for multiple video sources
DE50001023D1 (de) 1999-06-15 2003-02-06 Infineon Technologies Ag Verfahren und schaltungsanordnung zur kontrastverbesserung eines bildes
JP3412583B2 (ja) * 1999-11-08 2003-06-03 日本電気株式会社 カラー液晶ディスプレイの駆動方法及びその回路
US7170477B2 (en) * 2000-04-13 2007-01-30 Sharp Kabushiki Kaisha Image reproducing method, image display apparatus and picture signal compensation device
EP1326433B1 (en) * 2001-12-29 2012-04-11 Samsung Electronics Co., Ltd. Apparatus and method of controlling brightness of image
KR20030073390A (ko) * 2002-03-11 2003-09-19 삼성전자주식회사 동적 휘도비를 향상시키기 위한 액정 표시 장치 및 이장치를 위한 감마 전압 생성 방법
KR100490625B1 (ko) * 2003-02-20 2005-05-17 삼성에스디아이 주식회사 화상 표시 장치
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
JP4242691B2 (ja) * 2003-04-15 2009-03-25 オリンパス株式会社 固体撮像装置
JP4271978B2 (ja) * 2003-04-18 2009-06-03 株式会社日立製作所 映像表示装置
JP4617085B2 (ja) * 2004-02-16 2011-01-19 キヤノン株式会社 画像表示装置および画像表示方法
TWI280794B (en) * 2004-09-06 2007-05-01 Mstar Semiconductor Inc Brightness adjustment method and device
KR20070043258A (ko) * 2005-10-20 2007-04-25 삼성전자주식회사 디스플레이장치 및 그 제어방법
JP2007311889A (ja) * 2006-05-16 2007-11-29 Sony Corp 画像補正回路、画像補正方法および画像表示装置
KR101279117B1 (ko) * 2006-06-30 2013-06-26 엘지디스플레이 주식회사 유기발광다이오드 표시소자 및 그의 구동 방법
KR20080015626A (ko) * 2006-08-16 2008-02-20 삼성전자주식회사 영상처리장치 및 영상처리방법
CN101743741B (zh) * 2007-05-22 2012-05-30 汤姆森许可贸易公司 用于对显示器的伽马特性进行预测的方法和系统
WO2008156445A1 (en) * 2007-06-18 2008-12-24 Thomson Licensing Method and system for display characterization and content calibration
US8154565B2 (en) * 2008-04-02 2012-04-10 Himax Imaging, Inc. Apparatus and method for gamma correction
KR101985313B1 (ko) * 2012-10-16 2019-06-03 삼성전자주식회사 디스플레이장치 및 그 제어방법
US11189210B2 (en) 2018-10-25 2021-11-30 Baylor University System and method for a multi-primary wide gamut color system
US10950162B2 (en) 2018-10-25 2021-03-16 Baylor University System and method for a six-primary wide gamut color system
US12444334B2 (en) 2018-10-25 2025-10-14 Baylor University System and method for a multi-primary wide gamut color system
US11373575B2 (en) 2018-10-25 2022-06-28 Baylor University System and method for a multi-primary wide gamut color system
US11532261B1 (en) 2018-10-25 2022-12-20 Baylor University System and method for a multi-primary wide gamut color system
US11289000B2 (en) * 2018-10-25 2022-03-29 Baylor University System and method for a multi-primary wide gamut color system
US11062638B2 (en) 2018-10-25 2021-07-13 Baylor University System and method for a multi-primary wide gamut color system
US11403987B2 (en) 2018-10-25 2022-08-02 Baylor University System and method for a multi-primary wide gamut color system
US11475819B2 (en) 2018-10-25 2022-10-18 Baylor University System and method for a multi-primary wide gamut color system
US12444337B2 (en) 2018-10-25 2025-10-14 Baylor University System and method for a multi-primary wide gamut color system
US11030934B2 (en) 2018-10-25 2021-06-08 Baylor University System and method for a multi-primary wide gamut color system
US11069280B2 (en) 2018-10-25 2021-07-20 Baylor University System and method for a multi-primary wide gamut color system
US10997896B2 (en) 2018-10-25 2021-05-04 Baylor University System and method for a six-primary wide gamut color system
US10607527B1 (en) 2018-10-25 2020-03-31 Baylor University System and method for a six-primary wide gamut color system
US11410593B2 (en) 2018-10-25 2022-08-09 Baylor University System and method for a multi-primary wide gamut color system
US11315467B1 (en) 2018-10-25 2022-04-26 Baylor University System and method for a multi-primary wide gamut color system
US11043157B2 (en) 2018-10-25 2021-06-22 Baylor University System and method for a six-primary wide gamut color system
US10950161B2 (en) 2018-10-25 2021-03-16 Baylor University System and method for a six-primary wide gamut color system
US11289003B2 (en) 2018-10-25 2022-03-29 Baylor University System and method for a multi-primary wide gamut color system
US11587491B1 (en) 2018-10-25 2023-02-21 Baylor University System and method for a multi-primary wide gamut color system
US11069279B2 (en) 2018-10-25 2021-07-20 Baylor University System and method for a multi-primary wide gamut color system
US11488510B2 (en) 2018-10-25 2022-11-01 Baylor University System and method for a multi-primary wide gamut color system
US11037481B1 (en) 2018-10-25 2021-06-15 Baylor University System and method for a multi-primary wide gamut color system
US12475826B2 (en) 2018-10-25 2025-11-18 Baylor University System and method for a multi-primary wide gamut color system
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US12462772B1 (en) 2024-06-20 2025-11-04 6P Color, Inc. System and method for conversion from XYZ to multiple primaries using pseudo white points

Citations (2)

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JPS4721050U (enExample) * 1971-03-01 1972-11-09
JPS56125177A (en) * 1980-01-24 1981-10-01 Hitachi Denshi Ltd Contrast adjusting system for color television camera

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FR2312150A1 (fr) * 1975-05-23 1976-12-17 Thomson Csf Dispositif de correction de gamna et camera de television et telecinema incluant un tel dispositif
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JPS5553978A (en) * 1978-10-17 1980-04-19 Sony Corp Automatic luminance adjusting device for television picture receiver

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JPS4721050U (enExample) * 1971-03-01 1972-11-09
JPS56125177A (en) * 1980-01-24 1981-10-01 Hitachi Denshi Ltd Contrast adjusting system for color television camera

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61258567A (ja) * 1985-05-13 1986-11-15 Hitachi Denshi Ltd デイジタル映像信号処理方式
US5068719A (en) * 1989-06-07 1991-11-26 Olympus Optical Co., Ltd. Endoscope photometric apparatus
US5049989A (en) * 1990-01-04 1991-09-17 Olympus Optical Co., Ltd. Method and circuit for reducing the influence of a bright image area in an endoscope image signal
JPH0437263A (ja) * 1990-05-31 1992-02-07 Matsushita Electric Ind Co Ltd 階調補正装置
JPH0440170A (ja) * 1990-06-05 1992-02-10 Matsushita Electric Ind Co Ltd 映像信号の黒レベル補正装置
JPH11327496A (ja) * 1998-03-12 1999-11-26 Sony Corp 表示装置
US7737963B2 (en) 2001-09-27 2010-06-15 Samsung Electronics Co., Ltd. Liquid crystal display having gray voltages with varying magnitudes and driving method thereof

Also Published As

Publication number Publication date
US4489349A (en) 1984-12-18
CA1164994A (en) 1984-04-03
JPH0139267B2 (enExample) 1989-08-18

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