17 January 2005 Estimation of fluorescent scene illuminant by a spectral camera system
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Abstract
A method is proposed for estimating fluorescent scene illumination with spiky spectrum by using a spectral imaging system. The system is composed of a LCT filter, a monochrome CCD camera, and a personal computer. The gray world assumption is used for estimating the illuminant spectrum from the camera outputs. It is possible to infer the material type of fluorescent light source by knowing the wavelengths of spikes on the estimated illuminant spectrum. A procedure is proposed for classifying scene illuminants into two steps; the gross classification of classifying the illuminant into three groups and the detailed classification of determining a unique fluorescent type. Algorithms are developed for peak detection using the second derivative spectrum for the gross classification and sensor correlation using the background continuum for the detailed classification. Finally, the feasibility of the proposed method is demonstrated in an experiment using six real fluorescent lamps.
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Shoji Tominaga, Shoji Tominaga, Hideo Haraguchi, Hideo Haraguchi, } "Estimation of fluorescent scene illuminant by a spectral camera system", Proc. SPIE 5667, Color Imaging X: Processing, Hardcopy, and Applications, (17 January 2005); doi: 10.1117/12.586810; https://doi.org/10.1117/12.586810
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