光学浅水海草高光谱识别

doi:10.11978/j.issn.1009-5470.2010.02.074

Abstract

Abstract:

The authors use the spectrum of Thalassia to analyze the optical properties of seagrass substrates. The results show that in the range of 450?780nm, the derivative spectral reflectance of seaweed can reflect the variability of leaf area index with high accuracy. Red edge calculated by the first order derivative spectrometry is a good indicator for chlorophyll concentration. In the derivative spectra, there are two obvious peaks at 625nm and 675nm, and the difference between the two peak values is large for seagrass. Other dominated peaks appear at 550nm, 700nm, and 750?780nm. Combining with the relationship between seagrass coverage rate and the spectral properties, the properties of peak distribution can be utilized to classify plenty of re-mote sensing data sets in order to monitor large scale spatio-temporal dynamic patterns.

Key words: seagrass, hyperspectrum, optically shallow water, the first derivative spectrum, coverage rate

YANG Chao-yu,YANG Ding-tian,ZHAO Jun,. Hyperspectral recognition of seagrass in optically shallow water[J].Journal of Tropical Oceanography, 2010, 29(2): 74-79.

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Hyperspectral recognition of seagrass in optically shallow water

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