WO2009091152A3 - Color recovery method and system - Google Patents

Color recovery method and system Download PDF

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Publication number
WO2009091152A3
WO2009091152A3 PCT/KR2008/007883 KR2008007883W WO2009091152A3 WO 2009091152 A3 WO2009091152 A3 WO 2009091152A3 KR 2008007883 W KR2008007883 W KR 2008007883W WO 2009091152 A3 WO2009091152 A3 WO 2009091152A3
Authority
WO
WIPO (PCT)
Prior art keywords
color
colors
images
recovery method
present
Prior art date
Application number
PCT/KR2008/007883
Other languages
French (fr)
Other versions
WO2009091152A9 (en
WO2009091152A2 (en
Inventor
Chan Sup Chung
Original Assignee
Industry-Academic Cooperation Foundation
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 Industry-Academic Cooperation Foundation filed Critical Industry-Academic Cooperation Foundation
Publication of WO2009091152A2 publication Critical patent/WO2009091152A2/en
Publication of WO2009091152A3 publication Critical patent/WO2009091152A3/en
Publication of WO2009091152A9 publication Critical patent/WO2009091152A9/en

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T5/00—Image enhancement or restoration
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/46—Colour picture communication systems
    • H04N1/56—Processing of colour picture signals
    • H04N1/60—Colour correction or control
    • H04N1/6027—Correction or control of colour gradation or colour contrast
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/46—Colour picture communication systems
    • H04N1/56—Processing of colour picture signals
    • H04N1/60—Colour correction or control
    • H04N1/62—Retouching, i.e. modification of isolated colours only or in isolated picture areas only

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Image Processing (AREA)
  • Processing Of Color Television Signals (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Color Image Communication Systems (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Controls And Circuits For Display Device (AREA)

Abstract

The present invention relates to a color recovery method and system, and more specifically, to a color recovery method and system that recovers colors of digital images distorted due to lighting by using a principle of implementing color constancy based on a human vision system. The present invention comprises: a) determining criterion region in consideration of variance values for each color channel of images to be recovered; b) computing relative surface reflectance for the determined criterion regions and computing adjustment coefficients for excluding distortion effects of a light source using the computed relative surface reflectance; and c) recovering the colors for the images by using the adjustment coefficient. With the present invention, the distorted colors of digital images due to the spectral bias of a light source can be easily recovered in a very fast single step operation free from the unique color problem, one of the worst problems in the field of color correction technology so-far known as impossible to solve, if and only if there is a sub-region in a digital image containing sufficient number of surface elements of different reflectance.
PCT/KR2008/007883 2008-01-16 2008-12-31 Color recovery method and system WO2009091152A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2008-0005017 2008-01-16
KR1020080005017A KR100933282B1 (en) 2008-01-16 2008-01-16 Color restoration method and system

Publications (3)

Publication Number Publication Date
WO2009091152A2 WO2009091152A2 (en) 2009-07-23
WO2009091152A3 true WO2009091152A3 (en) 2009-10-01
WO2009091152A9 WO2009091152A9 (en) 2009-11-26

Family

ID=40885777

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2008/007883 WO2009091152A2 (en) 2008-01-16 2008-12-31 Color recovery method and system

Country Status (4)

Country Link
JP (1) JP2009171585A (en)
KR (1) KR100933282B1 (en)
CN (1) CN101489022B (en)
WO (1) WO2009091152A2 (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101133572B1 (en) * 2005-06-21 2012-04-05 삼성전자주식회사 Color gamut reproducing apparatus having wide color gamut and color signal processing method the same
CN102867295B (en) * 2012-08-06 2015-10-21 电子科技大学 A kind of color correction method for color image
JP6120515B2 (en) * 2012-09-26 2017-04-26 キヤノン株式会社 Image processing apparatus, image processing method, and program
GB2521866A (en) * 2014-01-07 2015-07-08 Nokia Technologies Oy An apparatus and/or method and/or computer program for creating images adapted for transflective displays
KR101708689B1 (en) * 2015-08-24 2017-02-21 엘지전자 주식회사 Image Quality Improvement Method of Head Mounted Display including Optical system having Holographic Optical Elements
CN106204481B (en) * 2016-07-10 2019-06-25 上海大学 A kind of illumination estimation method of image color shape constancy
CN109417616B (en) * 2016-08-22 2020-05-08 华为技术有限公司 Method and apparatus for image processing
CN110033521B (en) * 2019-04-01 2020-01-14 重庆固成未来教育科技有限公司 Three-dimensional visualization system based on VR and AR technologies
WO2021091820A1 (en) * 2019-11-05 2021-05-14 Google Llc Highlight recovery for image processing pipeline
CN112637568B (en) * 2020-12-24 2021-11-23 中标慧安信息技术股份有限公司 Distributed security monitoring method and system based on multi-node edge computing equipment
CN113303905B (en) * 2021-05-26 2022-07-01 中南大学湘雅二医院 Interventional operation simulation method based on video image feedback
CN113792710A (en) * 2021-11-15 2021-12-14 滨州学院 Spectrum reconstruction method and device and electronic equipment
CN115861450A (en) * 2022-10-28 2023-03-28 河南科技学院 Piecewise linear stretching underwater image color correction method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0766986A (en) * 1993-08-25 1995-03-10 Toyo Ink Mfg Co Ltd Device and method for adjusting color balance
JP2006262404A (en) * 2005-03-18 2006-09-28 Sharp Corp Device and method for estimating light source, image processor, and method for image processing
JP2006339897A (en) * 2005-05-31 2006-12-14 Univ Of Tokyo System, method, and program for color conversion

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3008878B2 (en) 1997-02-14 2000-02-14 日本電気株式会社 Color conversion method and apparatus, and machine-readable recording medium recording program
US7144133B2 (en) * 2002-05-17 2006-12-05 Infocus Corporation Transflective color recovery
CN100407288C (en) * 2005-03-22 2008-07-30 广达电脑股份有限公司 Method and apparatus for adjusting input image in accordance with display system characteristics

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0766986A (en) * 1993-08-25 1995-03-10 Toyo Ink Mfg Co Ltd Device and method for adjusting color balance
JP2006262404A (en) * 2005-03-18 2006-09-28 Sharp Corp Device and method for estimating light source, image processor, and method for image processing
JP2006339897A (en) * 2005-05-31 2006-12-14 Univ Of Tokyo System, method, and program for color conversion

Also Published As

Publication number Publication date
WO2009091152A9 (en) 2009-11-26
KR20090079069A (en) 2009-07-21
CN101489022A (en) 2009-07-22
KR100933282B1 (en) 2009-12-22
WO2009091152A2 (en) 2009-07-23
JP2009171585A (en) 2009-07-30
CN101489022B (en) 2011-09-14

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