14 January 2002 Laser-induced fluorescence imaging: application to groups of macroalgae identification
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Abstract
Up to now, no technique was available to perform inventories and surveys of immersed macroalgae. This article presents a method making it possible to discriminate between macroalgae and sea-floor and to identify the various macroalgae groups. To our knowledge, this is the first EEM of macroalgae ever carried out allowing the identification of the spectral characteristics of each macroalgae group. Fluorescence imaging provides the spatial dimension besides spectral properties. An OPO laser excites a test scene of macroalgae in a sea-water aquarium. Laser-induced fluorescence images from 400 nm to 640 nm displayed by steps of 10 nm are filtered at 680 nm. Their analysis, combined to the water depth parameter, leads to an identification method for macroalgae groups in a false-color image: each of the three macroalgae groups is enhanced by one defined threshold on this false-color image.
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Christelle Kieleck, Christelle Kieleck, Bruno Bousquet, Bruno Bousquet, Guy Le Brun, Guy Le Brun, Jack Cariou, Jack Cariou, Jean Lotrian, Jean Lotrian, } "Laser-induced fluorescence imaging: application to groups of macroalgae identification", Proc. SPIE 4488, Ocean Optics: Remote Sensing and Underwater Imaging, (14 January 2002); doi: 10.1117/12.452811; https://doi.org/10.1117/12.452811
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