WO2007077380A3 - Colour image correction and obtaining of at least one colour invariant - Google Patents

Colour image correction and obtaining of at least one colour invariant Download PDF

Info

Publication number
WO2007077380A3
WO2007077380A3 PCT/FR2006/051412 FR2006051412W WO2007077380A3 WO 2007077380 A3 WO2007077380 A3 WO 2007077380A3 FR 2006051412 W FR2006051412 W FR 2006051412W WO 2007077380 A3 WO2007077380 A3 WO 2007077380A3
Authority
WO
WIPO (PCT)
Prior art keywords
output
colour
net
pixels
propagation
Prior art date
Application number
PCT/FR2006/051412
Other languages
French (fr)
Other versions
WO2007077380A2 (en
Inventor
Benedicte Bascle
Olivier Bernier
Original Assignee
France Telecom
Benedicte Bascle
Olivier Bernier
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 France Telecom, Benedicte Bascle, Olivier Bernier filed Critical France Telecom
Publication of WO2007077380A2 publication Critical patent/WO2007077380A2/en
Publication of WO2007077380A3 publication Critical patent/WO2007077380A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals
    • H04N9/73—Colour balance circuits, e.g. white balance circuits or colour temperature control
    • 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

Abstract

The invention relates to a method of correcting a colour image so as to compensate for changes of illumination, using a neural net that is previously subjected to a learning phase, comprising cycles of propagation and back-propagation on pairs of pixels of different illuminations, during which when a pixel is applied to the input of the net, the associated pixel is applied to its output. According to the invention, - the output of a neuron (N1) of the median layer of the net has its output forced, during the propagation steps of the learning phase, to the luminance value (L) of the output pixel, - after the learning phase, said neuron (N1) has its output forced to a predetermined luminance value (L), while the pixels of the colour image to be corrected are applied to the input of the net so as to obtain corrected pixels at the output.
PCT/FR2006/051412 2006-01-05 2006-12-21 Colour image correction and obtaining of at least one colour invariant WO2007077380A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0650035A FR2895823A1 (en) 2006-01-05 2006-01-05 Human, animal or object surface`s color image correcting method, involves forcing output of neuron of median layer in neural network, during propagation steps of learning phase, to luminance value of output pixel
FR0650035 2006-01-05

Publications (2)

Publication Number Publication Date
WO2007077380A2 WO2007077380A2 (en) 2007-07-12
WO2007077380A3 true WO2007077380A3 (en) 2007-08-23

Family

ID=37314069

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FR2006/051412 WO2007077380A2 (en) 2006-01-05 2006-12-21 Colour image correction and obtaining of at least one colour invariant

Country Status (2)

Country Link
FR (1) FR2895823A1 (en)
WO (1) WO2007077380A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105787559B (en) * 2016-02-29 2017-12-26 嘉兴学院 Colour-spun yarns color matching method based on neutral net
US10430978B2 (en) 2017-03-02 2019-10-01 Adobe Inc. Editing digital images utilizing a neural network with an in-network rendering layer
CN107464244A (en) * 2017-03-09 2017-12-12 广东顺德中山大学卡内基梅隆大学国际联合研究院 A kind of image irradiation method of estimation based on neutral net

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5386496A (en) * 1991-02-15 1995-01-31 Toyo Ink Mfg. Co., Ltd. Method and device for nonlinear transformation of colour information by neural network
US5771311A (en) * 1995-05-17 1998-06-23 Toyo Ink Manufacturing Co., Ltd. Method and apparatus for correction of color shifts due to illuminant changes
US5929906A (en) * 1995-12-07 1999-07-27 Shiro Usui Color correcting method and apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5386496A (en) * 1991-02-15 1995-01-31 Toyo Ink Mfg. Co., Ltd. Method and device for nonlinear transformation of colour information by neural network
US5771311A (en) * 1995-05-17 1998-06-23 Toyo Ink Manufacturing Co., Ltd. Method and apparatus for correction of color shifts due to illuminant changes
US5929906A (en) * 1995-12-07 1999-07-27 Shiro Usui Color correcting method and apparatus

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
COURTNEY S M ET AL: "A MULTISTAGE NEURAL NETWORK FOR COLOR CONSTANCY AND COLOR INDUCTION", IEEE TRANSACTIONS ON NEURAL NETWORKS, IEEE SERVICE CENTER, PISCATAWAY, NJ, US, vol. 6, no. 4, 1 July 1995 (1995-07-01), pages 972 - 985, XP000527411, ISSN: 1045-9227 *
COURTNEY S M ET AL: "Biologically-based neural network model of color constancy and color contrast", PROCEEDINGS OF THE INTERNATIONAL JOINT CONFERENCE ON NEURAL NETWORKS. (IJCNN). BALTIMORE, JUNE 7 - 11, 1992, NEW YORK, IEEE, US, vol. VOL. 3, 7 June 1992 (1992-06-07), pages 55 - 60, XP010060056, ISBN: 0-7803-0559-0 *

Also Published As

Publication number Publication date
FR2895823A1 (en) 2007-07-06
WO2007077380A2 (en) 2007-07-12

Similar Documents

Publication Publication Date Title
WO2007036853A3 (en) Image detail enhancement
WO2019236626A3 (en) Hdr image generation from single-shot hdr color image sensors
WO2008066703A3 (en) Providing a desired resolution color image
WO2009072207A1 (en) Image correction device, image correction program, and image correction method
US9710892B2 (en) Image enhancement method and image processing apparatus thereof
TW200735640A (en) Method and apparatus providing noise reduction while preserving edges for imagers
WO2007120633A3 (en) Method and system for separating illumination and reflectance using a log color space
CN109785240B (en) Low-illumination image enhancement method and device and image processing equipment
WO2006006083A3 (en) Method and apparatus for image processing
WO2010043996A3 (en) Contrast enhancement of images
WO2007095477A3 (en) Image blurring
WO2008117818A1 (en) Image processor, image processing method, computer program product for image processing, and camera
WO2008154281A3 (en) Method and apparatus for enhancing images
WO2007079039A3 (en) Automatic removal of purple fringing from images
JP2009044681A5 (en)
JP2014021931A5 (en)
WO2010038941A3 (en) Apparatus and method of obtaining high resolution image
WO2012170462A3 (en) Automatic exposure correction of images
US9336571B2 (en) Method and device of skin tone optimization in a color gamut mapping system
JP2012165146A5 (en)
JP2005227694A5 (en)
JP2008125112A5 (en)
SG138583A1 (en) Integrated histogram auto adaptive contrast control (acc)
TW200642447A (en) Pixel compensation method for an image sensor
JP2021027535A5 (en)

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application
NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 06847202

Country of ref document: EP

Kind code of ref document: A2