JP4283297B2 - 映像補償方法 - Google Patents
映像補償方法 Download PDFInfo
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- JP4283297B2 JP4283297B2 JP2006266933A JP2006266933A JP4283297B2 JP 4283297 B2 JP4283297 B2 JP 4283297B2 JP 2006266933 A JP2006266933 A JP 2006266933A JP 2006266933 A JP2006266933 A JP 2006266933A JP 4283297 B2 JP4283297 B2 JP 4283297B2
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Classifications
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- H04N1/46—Colour picture communication systems
- H04N1/56—Processing of colour picture signals
- H04N1/60—Colour correction or control
- H04N1/6083—Colour correction or control controlled by factors external to the apparatus
- H04N1/6086—Colour correction or control controlled by factors external to the apparatus by scene illuminant, i.e. conditions at the time of picture capture, e.g. flash, optical filter used, evening, cloud, daylight, artificial lighting, white point measurement, colour temperature
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/2003—Display of colours
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
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- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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- G09G5/02—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed
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- H04N21/414—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance
- H04N21/41407—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance embedded in a portable device, e.g. video client on a mobile phone, PDA, laptop
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- G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
- G09G2360/144—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light being ambient light
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- 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
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/422—Input-only peripherals, i.e. input devices connected to specially adapted client devices, e.g. global positioning system [GPS]
- H04N21/42202—Input-only peripherals, i.e. input devices connected to specially adapted client devices, e.g. global positioning system [GPS] environmental sensors, e.g. for detecting temperature, luminosity, pressure, earthquakes
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Facsimile Image Signal Circuits (AREA)
- Controls And Circuits For Display Device (AREA)
- Processing Of Color Television Signals (AREA)
- Image Processing (AREA)
- Color Image Communication Systems (AREA)
- Liquid Crystal Display Device Control (AREA)
- Picture Signal Circuits (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Description
E. H. Land, "Color vision and the natural image," Proc. Nat’l Academy of Science USA, vol. 45, no. 3, pp. 115-119, 1959. Hesien-Lee, "Method for computing the scene-illuminant chromaticity from specular highlights," J. Opt Soc. Am., A, vol. 3, no. 10, pp. 1694-1699, Oct. 1986. L. T. Maloney and B. A. Wandell, "A computational model for color constancy," J. Optical Soc. Am., A, vol. 3, pp. 29-33, 1986.
・・・数式(1)
但し、Cは暗室で測定された映像の基準彩度、C diff はフレア現象が発生した後に変化された彩度として C diff =C−C flare に示され、C’は補償された彩度、αは彩度変化に従う加重値、C flare は明度の補償後に発生した彩度変化である。
.........数式(8)
........数式(9)
........数式(10)
........数式(11)
........数式(12)
Claims (5)
- 映像表示手段の周囲の背景照明の明度、彩度、色相を測定する第1のステップと、
明度を補償し、明度の補償により変化された前記映像の明度、彩度及び色相を検出する第2のステップと、
前記第1及び第2のステップにおいて算出されたそれぞれの彩度を比較し、暗室で測定された映像表示手段の三刺激値と外部背景照明が存在する状態で測定された映像表示手段の三刺激値との間の偏差を算出する第3のステップと、
前記第3のステップにおいて算出された三刺激値の偏差に従って映像表示手段の明度及び彩度を補償するための第4のステップと、を含み、
前記第4のステップの彩度の補償は、下記の数式(1)によることを特徴とする映像補償方法。
但し、Cは暗室で測定された映像の基準彩度、C diff はフレア現象が発生した後に変化された彩度として C diff =C−C flare に示され、C’は補償された彩度、αは彩度変化に従う加重値、C flare は明度の補償後に発生した彩度変化である。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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KR1020050091342A KR100735283B1 (ko) | 2005-09-29 | 2005-09-29 | 영상 보상 방법 |
Publications (2)
Publication Number | Publication Date |
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JP2007097191A JP2007097191A (ja) | 2007-04-12 |
JP4283297B2 true JP4283297B2 (ja) | 2009-06-24 |
Family
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Application Number | Title | Priority Date | Filing Date |
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JP2006266933A Expired - Fee Related JP4283297B2 (ja) | 2005-09-29 | 2006-09-29 | 映像補償方法 |
Country Status (5)
Country | Link |
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US (1) | US7978201B2 (ja) |
EP (1) | EP1770999B1 (ja) |
JP (1) | JP4283297B2 (ja) |
KR (1) | KR100735283B1 (ja) |
CN (1) | CN100478772C (ja) |
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JP2010060638A (ja) * | 2008-09-01 | 2010-03-18 | Toshiba Corp | 画像表示装置及びその方法 |
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2005
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-
2006
- 2006-09-12 US US11/519,598 patent/US7978201B2/en active Active
- 2006-09-29 CN CNB2006101414527A patent/CN100478772C/zh not_active Expired - Fee Related
- 2006-09-29 JP JP2006266933A patent/JP4283297B2/ja not_active Expired - Fee Related
- 2006-09-29 EP EP06121558.8A patent/EP1770999B1/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
KR100735283B1 (ko) | 2007-07-03 |
CN1940695A (zh) | 2007-04-04 |
JP2007097191A (ja) | 2007-04-12 |
KR20070036387A (ko) | 2007-04-03 |
CN100478772C (zh) | 2009-04-15 |
EP1770999A2 (en) | 2007-04-04 |
US7978201B2 (en) | 2011-07-12 |
EP1770999A3 (en) | 2009-11-04 |
US20070070091A1 (en) | 2007-03-29 |
EP1770999B1 (en) | 2018-09-19 |
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