7 May 2016 Spectral classifying base on color of live corals and dead corals covered with algae
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Pigments in the host tissues of corals can make a significant contribution to their spectral signature and can affect their apparent color as perceived by a human observer. The aim of this study is classifying the spectral reflectance of corals base on different color. It is expected that they can be used as references in discriminating between live corals, dead coral covered with algae Spectral reflectance data was collected in three small islands, Spermonde Archipelago, Indonesia by using a hyperspectral radiometer underwater. First and second derivative analysis resolved the wavelength locations of dominant features contributing to reflectance in corals and support the distinct differences in spectra among colour existed. Spectral derivative analysis was used to determine the specific wavelength regions ideal for remote identification of substrate type. The analysis results shown that yellow, green, brown and violet live corals are spectrally separable from each other, but they are similar with dead coral covered with algae spectral.
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Nurjannah Nurdin, Teruhisa Komatsu, Laurent Barille, M. Akbar A. S., Shuhei Sawayama, Muh. Nur Fitrah, Hermansyah Prasyad, "Spectral classifying base on color of live corals and dead corals covered with algae", Proc. SPIE 9878, Remote Sensing of the Oceans and Inland Waters: Techniques, Applications, and Challenges, 987811 (7 May 2016); doi: 10.1117/12.2227297; https://doi.org/10.1117/12.2227297


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