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Volume: 8 | Article ID: art00019
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Shadow Identification using Colour Ratios
Kobus Barnard
Graham Finlayson
  DOI :  10.2352/CIC.2000.8.1.art00019  Published Online :  January 2000
Abstract

In this paper we present a comprehensive method for identifying probable shadow regions in an image. Doing so is relevant to computer vision, colour constancy, and image reproduction, specifically dynamic range compression. Our method begins with a segmentation of the image into regions of the same colour. Then the edges between the regions are analyzed with respect to the possibility that each is due to an illumination change as opposed to a material boundary. We then integrate the edge information to produce an estimate of the illumination field.

Journal Title : Color and Imaging Conference
Publisher Name : Society of Imaging Science and Technology
Publisher Location : 7003 Kilworth Lane, Springfield, VA 22151, USA
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 DOI 10.2352/CIC.2000.8.1.art00019
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Kobus Barnard, Graham Finlayson, "Shadow Identification using Colour Ratios"  in Proc. IS&T 8th Color and Imaging Conf.,  2000,  pp 97 - 101,  https://doi.org/10.2352/CIC.2000.8.1.art00019

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Copyright © Society for Imaging Science and Technology 2000
72010350
Color and Imaging Conference
color imaging conf
2166-9635
Society of Imaging Science and Technology
7003 Kilworth Lane, Springfield, VA 22151, USA
2166-9635(20000101)2000:1L.97;1-
cic_v2000n1/splitsection19.xml
/ist/cic/2000/00002000/00000001/art00019
Articles
Shadow Identification using Colour Ratios
BarnardKobus
FinlaysonGraham
01012000
2000
1
97
101
2000
In this paper we present a comprehensive method for identifying probable shadow regions in an image. Doing so is relevant to computer vision, colour constancy, and image reproduction, specifically dynamic range compression. Our method begins with a segmentation of the image into regions of the same colour. Then the edges between the regions are analyzed with respect to the possibility that each is due to an illumination change as opposed to a material boundary. We then integrate the edge information to produce an estimate of the illumination field.