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WO2007026283A3 - Ambient lighting derived from video content using adaptive extraction regions - Google Patents

Ambient lighting derived from video content using adaptive extraction regions Download PDF

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Publication number
WO2007026283A3
WO2007026283A3 PCT/IB2006/052927 IB2006052927W WO2007026283A3 WO 2007026283 A3 WO2007026283 A3 WO 2007026283A3 IB 2006052927 W IB2006052927 W IB 2006052927W WO 2007026283 A3 WO2007026283 A3 WO 2007026283A3
Authority
WO
WIPO (PCT)
Prior art keywords
extraction
extraction regions
dominant
dominant color
video content
Prior art date
Application number
PCT/IB2006/052927
Other languages
French (fr)
Other versions
WO2007026283A2 (en
Inventor
Emmanuel Johannes Hubert Smits
Mark J Elting
Original Assignee
Koninkl Philips Electronics Nv
Emmanuel Johannes Hubert Smits
Mark J Elting
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 Koninkl Philips Electronics Nv, Emmanuel Johannes Hubert Smits, Mark J Elting filed Critical Koninkl Philips Electronics Nv
Publication of WO2007026283A2 publication Critical patent/WO2007026283A2/en
Publication of WO2007026283A3 publication Critical patent/WO2007026283A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/80—Camera processing pipelines; Components thereof
    • H04N23/84—Camera processing pipelines; Components thereof for processing colour signals
    • H04N23/88—Camera processing pipelines; Components thereof for processing colour signals for colour balance, e.g. white-balance circuits or colour temperature control
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Image Processing (AREA)
  • Processing Of Color Television Signals (AREA)

Abstract

Extracting video content encoded in a rendered color space for broadcast by an ambient light source, using adaptive extraction regions that can change their size, shape, location, and distribution. Perceptual rules in concert with user preferences can provide for intelligent dominant color selection. Steps include quantizing the video color space; performing dominant color extraction from adaptive extraction regions by using a mode, median, mean, or weighted average of pixel chromaticities; and applying perceptual rules to further derive dominant chromaticities via [1] chromaticity transforms; [2] a weighted average using a pixel weighting function influenced by scene content; [3] extended dominant color extraction where pixel weighting is reduced for majority pixels. Adapting the extraction regions allow for changing the luminance, the chromaticity, the temporal delivery, or the spatial extraction of said dominant color.
PCT/IB2006/052927 2005-08-31 2006-08-23 Ambient lighting derived from video content using adaptive extraction regions WO2007026283A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US71317805P 2005-08-31 2005-08-31
US60/713,178 2005-08-31

Publications (2)

Publication Number Publication Date
WO2007026283A2 WO2007026283A2 (en) 2007-03-08
WO2007026283A3 true WO2007026283A3 (en) 2007-06-07

Family

ID=37685979

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2006/052927 WO2007026283A2 (en) 2005-08-31 2006-08-23 Ambient lighting derived from video content using adaptive extraction regions

Country Status (1)

Country Link
WO (1) WO2007026283A2 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120242251A1 (en) * 2009-12-18 2012-09-27 Koninklijke Philips Electronics N.V. Ambience lighting system using global content characteristics
EP2731055A1 (en) 2012-10-04 2014-05-14 Thomson Licensing Method and apparatus for ambient lighting color determination
EP2854392A1 (en) * 2013-09-30 2015-04-01 Advanced Digital Broadcast S.A. Lighting system for a display unit and method for providing lighting functionality for a display unit
CN103795896B (en) * 2014-02-25 2016-10-05 冠捷显示科技（厦门）有限公司 A kind of display device ambient light control system
JP6383425B2 (en) 2014-02-25 2018-08-29 アップル インコーポレイテッドＡｐｐｌｅ Ｉｎｃ． Adaptive transfer functions for video encoding and decoding.
US10089960B2 (en) 2015-06-05 2018-10-02 Apple Inc. Rendering and displaying HDR content according to a perceptual model
CN106324952B (en) * 2015-07-07 2019-02-12 芋头科技（杭州）有限公司 A fusion display system
CN105916056B (en) * 2016-05-04 2018-11-23 深圳Tcl数字技术有限公司 Backlight adaptive regulation method and device
EP3925413B1 (en) * 2019-02-13 2023-10-18 Signify Holding B.V. Determining a light effect based on an average color after a detected transition in content
CN112203022B (en) * 2020-10-28 2022-08-19 努比亚技术有限公司 Electrochromic control method and device and computer readable storage medium
CN113705581B (en) * 2021-07-29 2025-01-10 中山市小兀照明科技有限公司 A method, device and computer-readable storage medium for characterizing light source performance
US12295081B2 (en) 2022-01-06 2025-05-06 Comcast Cable Communications, Llc Video display environmental lighting

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005069637A1 (en) * 2004-01-05 2005-07-28 Koninklijke Philips Electronics, N.V. Ambient light derived form video content by mapping transformations through unrendered color space

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005069637A1 (en) * 2004-01-05 2005-07-28 Koninklijke Philips Electronics, N.V. Ambient light derived form video content by mapping transformations through unrendered color space

Also Published As

Publication number Publication date
WO2007026283A2 (en) 2007-03-08

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