Research on Extraction Method of Water Body with DS Spectral Enhancement Based on HJ-1 Images
DENG Rui1, 4, HUANG Jing-feng1, 2, WANG Fu-min3*
1. Institute of Remote Sensing and Information System Application, Zhejiang University, Hangzhou 310029, China 2. Ministry of Education Key Laboratory of Environmental Remediation and Ecological Health, College of Natural Resources and Environmental Science, Zhejiang University, Hangzhou 310029, China 3. Institute of Hydrology and Water Resource, Zhejiang University, Hangzhou 310027, China 4. Key Laboratory of Agricultural Remote Sensing & Information System, Zhejiang University, Hangzhou 310029, China
Abstract：Natural disaster is one of the major global issues, and it is an important premise for disaster prevention and reduction to monitor it. In the present paper, multi-temporal HJ-1 images pre- and posto-typhoon Morakot were used. First, radiometric calibration and registration were done, then, decorrelation stretch (DS) was applied, and finally, maximum likelihood classification (MLC) was adopted to extract water body and monitor change of water body caused by typhoon Morakot. The results show that after DS spectral enhancement, the correlations among bands decrease and spectral differences increase, and it is helpful to identify surface features. The accuracy assessment demonstrates that the overall accuracies and Kappa coefficients of four phases are higher, above 96.0% and 0.94 respectively, than that of direct MLC without DS spectral enhancement. It is beneficial to scheduling flood discharge and ensuring the safety of reservoir downstream by comparing extracted multi-temporal water bodies.
邓 睿1, 4，黄敬峰1, 2，王福民3* . 基于去相关拉伸光谱增强的HJ-1影像水体信息提取方法研究 [J]. 光谱学与光谱分析, 2011, 31(11): 3064-3068.
DENG Rui1, 4, HUANG Jing-feng1, 2, WANG Fu-min3* . Research on Extraction Method of Water Body with DS Spectral Enhancement Based on HJ-1 Images. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2011, 31(11): 3064-3068.
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