WO2006081438A3 - Differentiation of illumination and reflection boundaries - Google Patents

Differentiation of illumination and reflection boundaries Download PDF

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Publication number
WO2006081438A3
WO2006081438A3 PCT/US2006/002966 US2006002966W WO2006081438A3 WO 2006081438 A3 WO2006081438 A3 WO 2006081438A3 US 2006002966 W US2006002966 W US 2006002966W WO 2006081438 A3 WO2006081438 A3 WO 2006081438A3
Authority
WO
WIPO (PCT)
Prior art keywords
illumination
boundaries
image
brightness
differentiation
Prior art date
Application number
PCT/US2006/002966
Other languages
French (fr)
Other versions
WO2006081438A2 (en
Inventor
Richard Mark Friedhoff
Original Assignee
Tandent Vision Science Inc
Richard Mark Friedhoff
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 Tandent Vision Science Inc, Richard Mark Friedhoff filed Critical Tandent Vision Science Inc
Priority to EP06719707A priority Critical patent/EP1842153B1/en
Priority to JP2007553271A priority patent/JP4783795B2/en
Publication of WO2006081438A2 publication Critical patent/WO2006081438A2/en
Publication of WO2006081438A3 publication Critical patent/WO2006081438A3/en

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/10—Segmentation; Edge detection
    • G06T7/12—Edge-based segmentation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/10—Image acquisition
    • G06V10/12—Details of acquisition arrangements; Constructional details thereof
    • G06V10/14—Optical characteristics of the device performing the acquisition or on the illumination arrangements
    • G06V10/143—Sensing or illuminating at different wavelengths
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/20—Image preprocessing
    • G06V10/26—Segmentation of patterns in the image field; Cutting or merging of image elements to establish the pattern region, e.g. clustering-based techniques; Detection of occlusion
    • G06V10/273—Segmentation of patterns in the image field; Cutting or merging of image elements to establish the pattern region, e.g. clustering-based techniques; Detection of occlusion removing elements interfering with the pattern to be recognised
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/40—Extraction of image or video features
    • G06V10/44—Local feature extraction by analysis of parts of the pattern, e.g. by detecting edges, contours, loops, corners, strokes or intersections; Connectivity analysis, e.g. of connected components
    • G06V10/457—Local feature extraction by analysis of parts of the pattern, e.g. by detecting edges, contours, loops, corners, strokes or intersections; Connectivity analysis, e.g. of connected components by analysing connectivity, e.g. edge linking, connected component analysis or slices
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/40—Extraction of image or video features
    • G06V10/56—Extraction of image or video features relating to colour
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/40—Extraction of image or video features
    • G06V10/60—Extraction of image or video features relating to illumination properties, e.g. using a reflectance or lighting model

Abstract

The present invention provides methods and apparatus for image processing in which brightness boundaries of an image are identified and analyzed in at least two, and more preferably three or more, spectral bands to distinguish illumination boundaries from reflectance boundaries. For example, in one embodiment of the invention, a brightness boundary of the image can be identified as an illumination boundary if at least two wavelength bands of the image exhibit a substantially common shift in brightness across the boundary.
PCT/US2006/002966 2005-01-27 2006-01-27 Differentiation of illumination and reflection boundaries WO2006081438A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP06719707A EP1842153B1 (en) 2005-01-27 2006-01-27 Differentiation of illumination and reflection boundaries
JP2007553271A JP4783795B2 (en) 2005-01-27 2006-01-27 Distinguishing between illumination and reflection boundaries

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US64822805P 2005-01-27 2005-01-27
US60/648,228 2005-01-27
US65030005P 2005-02-03 2005-02-03
US60/650,300 2005-02-03

Publications (2)

Publication Number Publication Date
WO2006081438A2 WO2006081438A2 (en) 2006-08-03
WO2006081438A3 true WO2006081438A3 (en) 2008-01-10

Family

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Family Applications (2)

Application Number Title Priority Date Filing Date
PCT/US2006/002966 WO2006081438A2 (en) 2005-01-27 2006-01-27 Differentiation of illumination and reflection boundaries
PCT/US2006/002965 WO2006081437A2 (en) 2005-01-27 2006-01-27 Method and system for identifying illumination flux in an image

Family Applications After (1)

Application Number Title Priority Date Filing Date
PCT/US2006/002965 WO2006081437A2 (en) 2005-01-27 2006-01-27 Method and system for identifying illumination flux in an image

Country Status (4)

Country Link
US (3) US7672530B2 (en)
EP (2) EP1842153B1 (en)
JP (2) JP4857287B2 (en)
WO (2) WO2006081438A2 (en)

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Also Published As

Publication number Publication date
EP1842154B1 (en) 2012-08-01
US20100074539A1 (en) 2010-03-25
WO2006081437A3 (en) 2007-07-26
US7873219B2 (en) 2011-01-18
US7672530B2 (en) 2010-03-02
JP4857287B2 (en) 2012-01-18
WO2006081438A2 (en) 2006-08-03
EP1842153A2 (en) 2007-10-10
EP1842154B9 (en) 2013-02-13
EP1842153A4 (en) 2009-04-15
JP4783795B2 (en) 2011-09-28
US20060177137A1 (en) 2006-08-10
JP2008529169A (en) 2008-07-31
EP1842153B1 (en) 2012-08-01
US20060177149A1 (en) 2006-08-10
EP1842154A4 (en) 2009-03-25
EP1842154A2 (en) 2007-10-10
WO2006081437A2 (en) 2006-08-03
JP2008529170A (en) 2008-07-31

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