Title:
IMAGE PROCESSING
Document Type and Number:
WIPO Patent Application WO/2014/053837
Kind Code:
A3
Abstract:
There is described an image processing method in which a scene is repeatedly imaged to form a series of input images. For at least a subset of the input images, a colour calibration procedure is conducted which populates a foreground colour histogram with the frequency of occurrence of colour values in a stencil area of the input image, and populates a background colour histogram with the frequency of occurrence of colour values outside of the stencil portion of the input image. For at least a subset of the input images, a colour replacement procedure is conducted which updates the stencil area based on a determination, from the colour values of pixels within the input image, of likelihood values representing the likelihood of pixels belonging to an image area of interest, the likelihood value for each colour value being determined from a combination of the foreground and background colour histograms, replaces the original colour values of pixels within the updated stencil area of the input image with replacement colour values, and displays the image on which colour replacement processing has been conducted. In this way, a stencil area is determined based on foreground/background histogramming, and used both to define an area to which colour replacement processing is to be conducted, and also an area for use in further populating the colour histograms to calibrate the colour replacement processing.
Inventors:
FREEMAN RUSSELL (GB)
Application Number:
PCT/GB2013/052573
Publication Date:
July 31, 2014
Filing Date:
October 02, 2013
Export Citation:
Assignee:
HOLITION LTD (GB)
International Classes:
G06T7/00
Foreign References:
| US20060239548A1 | 2006-10-26 | |||
| US20110211749A1 | 2011-09-01 |
Other References:
MANDAR KULKARNI: "Histogram-based foreground object extraction for indoor and outdoor scenes", PROCEEDINGS OF THE SEVENTH INDIAN CONFERENCE ON COMPUTER VISION, GRAPHICS AND IMAGE PROCESSING, ICVGIP '10, January 2010 (2010-01-01), New York, New York, USA, pages 148 - 154, XP055099777, ISBN: 978-1-45-030060-5, DOI: 10.1145/1924559.1924579
GVILI R ET AL: "Depth Keying", PROCEEDINGS OF SPIE, SPIE, US, vol. 5006, January 2003 (2003-01-01), pages 564 - 574, XP003006231, ISSN: 0277-786X, DOI: 10.1117/12.474052
GORDON G ET AL: "Background estimation and removal based on range and color", PROCEEDINGS OF THE 1999 IEEE COMPUTER SOCIETY CONFERENCE ON COMPUTER VISION AND PATTERN RECOGNITION, JUNE 23-25, 1999; FORT COLLINS, COLORADO, IEEE, THE INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS, INC, US, vol. 2, 23 June 1999 (1999-06-23), pages 459 - 464, XP010347568, ISBN: 978-0-7695-0149-9
ERIKO IWABUCHI ET AL: "Smart Makeup Mirror: Computer-Augmented Mirror to Aid Makeup Application", 19 July 2009, HUMAN-COMPUTER INTERACTION. INTERACTING IN VARIOUS APPLICATION DOMAINS, SPRINGER BERLIN HEIDELBERG, BERLIN, HEIDELBERG, PAGE(S) 495 - 503, ISBN: 978-3-642-02582-2, XP019122334
GVILI R ET AL: "Depth Keying", PROCEEDINGS OF SPIE, SPIE, US, vol. 5006, January 2003 (2003-01-01), pages 564 - 574, XP003006231, ISSN: 0277-786X, DOI: 10.1117/12.474052
GORDON G ET AL: "Background estimation and removal based on range and color", PROCEEDINGS OF THE 1999 IEEE COMPUTER SOCIETY CONFERENCE ON COMPUTER VISION AND PATTERN RECOGNITION, JUNE 23-25, 1999; FORT COLLINS, COLORADO, IEEE, THE INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS, INC, US, vol. 2, 23 June 1999 (1999-06-23), pages 459 - 464, XP010347568, ISBN: 978-0-7695-0149-9
ERIKO IWABUCHI ET AL: "Smart Makeup Mirror: Computer-Augmented Mirror to Aid Makeup Application", 19 July 2009, HUMAN-COMPUTER INTERACTION. INTERACTING IN VARIOUS APPLICATION DOMAINS, SPRINGER BERLIN HEIDELBERG, BERLIN, HEIDELBERG, PAGE(S) 495 - 503, ISBN: 978-3-642-02582-2, XP019122334
Attorney, Agent or Firm:
LAM, Alvin (26 Caxton StreetLondon, SW1H 0RJ, GB)
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