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WO1995026611B1 - Procede et appareil de correction dynamique de la purete - Google Patents

Procede et appareil de correction dynamique de la purete

Info

Publication number
WO1995026611B1
WO1995026611B1 PCT/US1995/003637 US9503637W WO9526611B1 WO 1995026611 B1 WO1995026611 B1 WO 1995026611B1 US 9503637 W US9503637 W US 9503637W WO 9526611 B1 WO9526611 B1 WO 9526611B1
Authority
WO
WIPO (PCT)
Prior art keywords
monitor
color
correction values
values
luminescence
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.)
Ceased
Application number
PCT/US1995/003637
Other languages
English (en)
Other versions
WO1995026611A1 (fr
Filing date
Publication date
Priority claimed from US08/219,765 external-priority patent/US5510851A/en
Application filed filed Critical
Priority to EP95914828A priority Critical patent/EP0753236B1/fr
Priority to KR1019960705357A priority patent/KR970702670A/ko
Priority to JP7525222A priority patent/JPH09511073A/ja
Priority to AT95914828T priority patent/ATE221296T1/de
Priority to DE69527513T priority patent/DE69527513T2/de
Publication of WO1995026611A1 publication Critical patent/WO1995026611A1/fr
Publication of WO1995026611B1 publication Critical patent/WO1995026611B1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Definitions

  • a method of performing dynamic purity correction for a monitor having a face and being capable of displaying Y rows and X columns of pixels on the face, wherein each pixel has a luminescence value for each color component displayed by the monitor, the method comprising the steps of.
  • CVCC correction value calculation circuit
  • control points form a control point array that has Y rows and N columns, where N is an integer less than X. and where the control point array is subsequently stored in a memory;
  • the method according to claim 1 wherein the monitor displays three color components, the three color components being red, green and blue. 3. The method according to claim 1 , wherein the step of measuring the luminescence value* is accomplished by using a jig having an array of photometers.
  • the method according to claim 1. further comprising an additional step performed after the step of multiplying but before the step of displaying, the additional step comprising performing a gamma correction for the modified luminescence values.
  • the step of interpolating each row of N control points and multiplying each row of correction values by the luminescence values of the incoming signal is performed while the corresponding row of luminescence values of the incoming signal is being raster scanned.
  • the Calmull Rom spline is calculated using forward differences, which involves shifting steps and adding steps.
  • the CVCC includes a computer memory for storing the luminescence values provided thereto after said step of measuring
  • An apparatus for performing dynamic purity correction for a monitor wherein the monitor displays a plurality of pixels, each of said pixels having a luminescence value for each color component displayed by the monitor, said apparatus comprising:
  • sensing means for measuring the luminescence value for each color component of predetermined ones of the pixels displayed by the monitor:
  • correction value calculation circuit means coupled to the sensing means, for calculating correction values for each of the pixels displayed by the monitor based upon the luminescence values measured for each color component by the sensing means,
  • the CVCC means also receives incoming video signals and modifies these signals according to the correction values calculated and transmits the signals, after being modified, to the monitor, and wherein the CVCC means further comprises:
  • each of the grids in the first set has a first set of vertical columns and a first set of horizontal rows and represents one color component, and wherein the means for interpolating includes:
  • each grid of said second set of grids being stored as a second set of vertical columns and a second set of horizontal rows; and means for interpolating one row of said second set of horizontal rows from each grid of said second set of grids, to form a set of complete horizontal rows of correction values; and wherein the apparatus also includes:
  • both the means for interpolating the luminescence values in each vertical column and the means for interpolating one row include a Catmull-Rom spline interpolator.
  • the sensing means includes a jig having an array of photometers.
  • a method for performing dynamic purity correction for a monitor wherein the monitor displays a plurality of pixels, each of said pixels having a luminescence value for each color component displayed by the monitor, comprising the steps of:
  • the step of calculating correction values includes the steps of storing the luminescence values in a computer memory as a first set of grids;
  • each of the grids in the first set has a first set of vertical columns and a first set of horizontal rows and represents one color component
  • the step of interpolating the luminescence values includes the steps of:
  • each grid of said second set of grids being stored as a second set of vertical columns and a second set of horizontal rows:

Abstract

La présente invention se rapporte à un procédé et un appareil permettant d'effectuer une correction dynamique de la pureté afin d'assurer que la pureté des couleurs soit maintenue sur toute la surface d'un écran couleur (100). L'écran affiche une pluralité de pixels, dont chacun présente une valeur de luminescence particulière. Chaque valeur de luminescence comporte plusieurs composantes de couleur (par exemple rouge (R), vert (V) et bleu (B). Une grille de mesure de luminance est appliquée sur la surface de l'écran pour chaque composante de couleur. Des valeurs de correction à variation régulière sont calculées à partir de ces grilles de valeurs de luminance pour chaque composante de couleur de chaque pixel, par interpolation de fonctions 'pistolet' cubiques, telles que les fonctions 'pistolet' de Catmull-Rom. Des signaux vidéo numériques d'arrivée sont multipliés par des valeurs de correction correspondantes afin d'assurer la précision des couleurs de l'écran. Dans un mode préféré de réalisation, le calcul de valeurs de correction est effectué de manière répétée en temp réel (à la fréquence de base de l'affichage) dans un seul circuit intégré monolithique à mémoire vive et à convertisseur numérique/analogique (RAMDAC), afin d'accroître la vitesse, d'améliorer la fidélité du rendu et de réduire au mininum l'utilisation de l'espace mémoire.
PCT/US1995/003637 1994-03-29 1995-03-28 Procede et appareil de correction dynamique de la purete Ceased WO1995026611A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP95914828A EP0753236B1 (fr) 1994-03-29 1995-03-28 Procede et appareil de correction dynamique de la purete
KR1019960705357A KR970702670A (ko) 1994-03-29 1995-03-28 동적 순도 보정 방법 및 장치(method and apparatus for dynamic purity correction)
JP7525222A JPH09511073A (ja) 1994-03-29 1995-03-28 動的純度補正装置及び方法
AT95914828T ATE221296T1 (de) 1994-03-29 1995-03-28 Methode und vorrichtung zur dynamischen reinheitskorrektur
DE69527513T DE69527513T2 (de) 1994-03-29 1995-03-28 Methode und vorrichtung zur dynamischen reinheitskorrektur

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/219,765 US5510851A (en) 1994-03-29 1994-03-29 Method and apparatus for dynamic purity correction
US08/219,765 1994-03-29

Publications (2)

Publication Number Publication Date
WO1995026611A1 WO1995026611A1 (fr) 1995-10-05
WO1995026611B1 true WO1995026611B1 (fr) 1995-11-09

Family

ID=22820687

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1995/003637 Ceased WO1995026611A1 (fr) 1994-03-29 1995-03-28 Procede et appareil de correction dynamique de la purete

Country Status (8)

Country Link
US (1) US5510851A (fr)
EP (1) EP0753236B1 (fr)
JP (1) JPH09511073A (fr)
KR (1) KR970702670A (fr)
AT (1) ATE221296T1 (fr)
CA (1) CA2185799A1 (fr)
DE (1) DE69527513T2 (fr)
WO (1) WO1995026611A1 (fr)

Families Citing this family (46)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5821917A (en) * 1993-03-24 1998-10-13 Apple Computer, Inc. System and method to compensate for the effects of aging of the phosphors and faceplate upon color accuracy in a cathode ray tube
CN1070013C (zh) * 1994-12-14 2001-08-22 松下电器产业株式会社 具有校正亮度不均匀性的电路的投影型图像显示装置
US5798753A (en) * 1995-03-03 1998-08-25 Sun Microsystems, Inc. Color format conversion in a parallel processor
GB2305571B8 (en) * 1995-09-22 2000-01-31 Ibm Display apparatus with gamma correction
US6326996B1 (en) * 1995-11-06 2001-12-04 Gateway, Inc. Display device having self contained diagnostic image generation capability
US7728845B2 (en) * 1996-02-26 2010-06-01 Rah Color Technologies Llc Color calibration of color image rendering devices
US6459425B1 (en) 1997-08-25 2002-10-01 Richard A. Holub System for automatic color calibration
US6043909A (en) 1996-02-26 2000-03-28 Imagicolor Corporation System for distributing and controlling color reproduction at multiple sites
US5739870A (en) * 1996-03-11 1998-04-14 Display Laboratories, Inc. Math engine for generating font gradients
US20010007483A1 (en) * 1997-01-24 2001-07-12 Jacques Chauvin Circuit for convergence setting in a projection television display
US6281950B1 (en) 1997-06-16 2001-08-28 Display Laboratories, Inc. High speed digital zone control
KR100466530B1 (ko) * 1997-12-02 2005-09-30 삼성전자주식회사 텔레비전 수상기의 화이트 밸런스 자동 조정장치및 조정방법
US6075514A (en) * 1998-02-05 2000-06-13 Canon Kabushiki Kaisha Color table look-up having last value memory
US6351557B1 (en) 1998-04-03 2002-02-26 Avid Technology, Inc. Method and apparatus for color manipulation
JP3514776B2 (ja) * 1998-04-15 2004-03-31 三菱電機株式会社 マルチビジョンシステム
US6552731B1 (en) 1999-04-16 2003-04-22 Avid Technology, Inc. Multi-tone representation of a digital image on a digital nonlinear editing system
US6571255B1 (en) 1999-04-16 2003-05-27 Robert Gonsalves Modification of media with common attributes on a digital nonlinear editing system
US6417891B1 (en) * 1999-04-16 2002-07-09 Avid Technology, Inc. Color modification on a digital nonlinear editing system
US6847373B1 (en) 1999-04-16 2005-01-25 Avid Technology, Inc. Natural color matching in a video editing system
JP3632505B2 (ja) * 1999-06-18 2005-03-23 セイコーエプソン株式会社 画像表示装置
US6862029B1 (en) * 1999-07-27 2005-03-01 Hewlett-Packard Development Company, L.P. Color display system
TWI252592B (en) 2000-01-17 2006-04-01 Semiconductor Energy Lab EL display device
JP2001209358A (ja) * 2000-01-26 2001-08-03 Seiko Epson Corp 表示画像のムラ補正
US6928187B2 (en) * 2000-04-07 2005-08-09 Avid Technology, Inc. Secondary color modification of a digital image
US6477271B1 (en) 2000-04-07 2002-11-05 Avid Technology, Inc. Secondary color modification of a digital image
US7102648B1 (en) 2000-04-11 2006-09-05 Rah Color Technologies Llc Methods and apparatus for calibrating a color display
US6995753B2 (en) * 2000-06-06 2006-02-07 Semiconductor Energy Laboratory Co., Ltd. Display device and method of manufacturing the same
JP2002072963A (ja) * 2000-06-12 2002-03-12 Semiconductor Energy Lab Co Ltd 発光モジュールおよびその駆動方法並びに光センサ
US7002606B2 (en) * 2000-07-17 2006-02-21 Matsushita Electric Industrial Co., Ltd. Image signal processing apparatus, image display apparatus, multidisplay apparatus, and chromaticity adjustment method for use in the multidisplay apparatus
US6950109B2 (en) * 2000-10-23 2005-09-27 Sun Microsystems, Inc. Multi-spectral color correction
US6958785B2 (en) * 2001-10-22 2005-10-25 Eastman Kodak Company Method and apparatus for determining and correcting for illumination variations in a digital projector
US7253845B2 (en) * 2002-01-22 2007-08-07 Thomson Licensing Color non-uniformity correction for LCOS
JP4027284B2 (ja) * 2002-07-26 2007-12-26 キヤノン株式会社 画像表示装置の製造方法
US7379124B2 (en) * 2002-07-31 2008-05-27 Thomson Licensing Center convergence optimization in a projection display apparatus
AU2003283098A1 (en) 2002-11-04 2004-06-07 Ifire Technology Corp. Method and apparatus for gray-scale gamma correction for electroluminescent displays
WO2004056131A1 (fr) * 2002-12-18 2004-07-01 Koninklijke Philips Electronics N.V. Procede pour empecher le detourage video dans des systemes de correction de manque d'homogeneite des couleurs
JP2006512865A (ja) * 2003-01-03 2006-04-13 トムソン ライセンシング レジスタの変化を予測し補償し表示画像の白一様性を維持するシステム
FR2875666A1 (fr) * 2004-09-21 2006-03-24 Thomson Licensing Sa Procede et dispositif de traitement d'un signal video visant a compenser les defauts de dispositifs d'affichage
US7499163B2 (en) * 2005-02-15 2009-03-03 X-Rite Europe Gmbh System and method for applying correction factors related to ambient conditions
US20070285515A1 (en) * 2006-06-09 2007-12-13 Mark Hunter Method and apparatus for calibrating video signals
US8463068B2 (en) * 2007-08-09 2013-06-11 Micron Technology, Inc. Methods, systems and apparatuses for pixel value correction using multiple vertical and/or horizontal correction curves
US8248454B2 (en) * 2007-11-14 2012-08-21 Hewlett-Packard Development Company, L.P. Video display calibration system and method
US20090184947A1 (en) * 2008-01-22 2009-07-23 Hupman Paul M Color calibration system and method
KR101546850B1 (ko) * 2008-06-27 2015-08-24 삼성전자주식회사 디스플레이장치의 화질평가방법 및 화질평가장치
US11705028B2 (en) 2020-06-19 2023-07-18 GeoPost, Inc. Mobile device fixture for automated calibration of electronic display screens and method of use
CN114155817B (zh) * 2021-10-29 2022-11-01 江苏泽景汽车电子股份有限公司 一种hud显示系统的色彩矫正方法

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4658286A (en) * 1983-03-28 1987-04-14 Jack Schwartz Method and apparatus for correcting distortions in reproducing systems
JPS61113387A (ja) * 1984-11-07 1986-05-31 Olympus Optical Co Ltd モニタ装置
JPS61161093A (ja) * 1985-01-09 1986-07-21 Sony Corp ダイナミツクユニフオミテイ補正装置
JPS6273892A (ja) * 1985-09-27 1987-04-04 Fuji Photo Film Co Ltd カラ−画像のハ−ドコピ−形成装置およびその方法
CA1272286A (fr) * 1986-03-17 1990-07-31 Junichi Oshima Methode et dispositif pour etablir automatiquement l'equilbre des couleurs d'un moniteur de television en couleurs
US4962418A (en) * 1987-06-30 1990-10-09 Kabushiki Kaisha Toshiba Color picture display apparatus
GB8814157D0 (en) * 1988-06-15 1988-07-20 Crosfield Electronics Ltd Display control system
FR2652695B1 (fr) * 1989-10-03 1993-04-16 Thomson Csf Procede et dispositif de visualisation d'images, a correction automatique de defauts par contre-reaction.
FR2660090B1 (fr) * 1990-03-23 1994-07-29 Thomson Csf Dispositif de visualisation par projection a boucle de contre-reaction pour la correction de l'ensemble des defauts de l'image projetee.
US5325195A (en) * 1991-05-06 1994-06-28 Rasterops Corporation Video normalizer for a display monitor
US5155586A (en) * 1991-08-19 1992-10-13 Sony Corporation Of America Method and apparatus for flare correction
JPH06138849A (ja) * 1992-10-30 1994-05-20 Sharp Corp 液晶映像表示装置

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