Spectral mixing model and its stability of chlorophyll-a concentration extraction based on hyperspectral data
Spectral mixing model and its stability of chlorophyll-a concentration extraction based on hyperspectral data
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发表时间：
2007
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通讯作者：
Jianguang Wen;Q. Xiao;Yipeng Yang;Qinhuo Liu;Xiaowen Li
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作者：
Jianguang Wen;Q. Xiao;Yipeng Yang;Qinhuo Liu;Xiaowen Li
The development of hyperspectral technology enables the quantitative monitoring of water quality based on the hyperspectral data.By now,the ordinary monitoring method always depends on the developing relationships between radiance/reflectance in single band or band ratios and the chlorophyll-a concentration.In this paper,a spectral mixing model is established based on the field hyperspectral data.And three types of data,the original,normalized and differential data,are selected as the input.The optimal band range(670-710*!nm) which indicates the chlorophyll-a concentration is selected,and the chlorophyll-a concentration is reverted by the linear spectral mixing model in which the water and chlorophyll-a end-member spectral come from in situ water samples.The compared results show that the spectral mixing model based on differential data gives the best result in the model precision and stabilization.Finally,three-phase field hyperspectral data are processed and the chlorophyll-a concentration is extracted by using this spectral mixing model.The result shows that the spectral mixing model is a feasible,stable and of high resolution model in the practical application of remote sensing water quality monitoring.
