Metamer-set-based approach to estimating surface reflectance from camera RGB
JOSA A, Vol. 23, Issue 8, pp. 1814-1822 (2006)
http://dx.doi.org/10.1364/JOSAA.23.001814
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Abstract
We present an approach to estimating the reflectance of a surface given its camera response. In this approach we first solve the general form of this problem: We calculate the set of all possible surface reflectances, called the metamer set, and then choose a member from this set. Three possibilities in choosing a single reflectance are described here. First, we assume that all reflectances are equally likely and minimize worst-case error. Second, we adopt the assumption that reflectances follow a normal probability distribution and maximize this probability. Finally, we assume that reflectances are smooth and maximize this property. The results of our experiments show that there is significant benefit from the proposed approach in terms of the accuracy of the estimation compared with that of standard estimation methods. Moreover, the present approach introduces a notion of robustness of estimates in the form of error bars.
© 2006 Optical Society of America
OCIS Codes
(330.0330) Vision, color, and visual optics : Vision, color, and visual optics
(330.1710) Vision, color, and visual optics : Color, measurement
(330.1720) Vision, color, and visual optics : Color vision
(330.6180) Vision, color, and visual optics : Spectral discrimination
(330.7310) Vision, color, and visual optics : Vision
ToC Category:
Vision, Color, and Visual Optics
History
Original Manuscript: September 1, 2005
Revised Manuscript: January 16, 2006
Manuscript Accepted: January 24, 2006
Virtual Issues
Vol. 1, Iss. 9 Virtual Journal for Biomedical Optics
Citation
Peter Morovic and Graham D. Finlayson, "Metamer-set-based approach to estimating surface reflectance from camera RGB," J. Opt. Soc. Am. A 23, 1814-1822 (2006)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=josaa-23-8-1814
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