| 基于冠层多维光谱的水稻镉污染胁迫诊断模型研究 |
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| 引用本文： | 金铭,刘湘南,李铁瑛. 基于冠层多维光谱的水稻镉污染胁迫诊断模型研究[J]. 中国环境科学, 2011, 31(1): 137-143 |
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| 作者姓名： | 金铭 刘湘南 李铁瑛 |
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| 作者单位： | 1. 中国地质大学信息工程学院,北京,100083
2. 中国地质大学水资源与环境学院,北京,100083 |
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| 基金项目： | 国家自然科学基金资助项目，国家"863"项目 |
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| 摘 要： | 鉴于镉对水稻各种生理特征参数的影响具有复杂隐蔽性,导致冠层光谱特征变化微小,需要采用一些方法增强和提取隐含在光谱中的污染弱信息.在水稻冠层高光谱数据和各种实测生化参数的支持下,利用主成分分析、独立分量分析和分形分析技术从高光谱遥感数据中提取镉污染弱信息,获取水稻镉污染敏感光谱因子,包括第一主成分F1、独立分量ICA1和光谱分维D.利用3个敏感因子分别构建水稻镉污染一维诊断模型,获得较好的诊断效果.进一步将3个光谱因子进行组合构建二维诊断模型和三维诊断模型,使污染胁迫诊断结果更稳定直观.
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| 关 键 词： | 水稻镉污染 高光谱遥感 主成分分析 独立分量分析 分形分析 多维光谱诊断模型 |
| 收稿时间： | 2010-05-07; |
Diagnostic models research for Cd stress of rice based on canopy multi-dimensional spectra |
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| JIN Ming,LIU Xiang-nan,LI Tie-ying. Diagnostic models research for Cd stress of rice based on canopy multi-dimensional spectra[J]. China Environmental Science, 2011, 31(1): 137-143 |
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| Authors: | JIN Ming LIU Xiang-nan LI Tie-ying |
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| Affiliation: | JIN Ming1,LIU Xiang-nan1,LI Tie-ying2(1.School of Information Engineering,China University of Geosciences,Beijing 100083,China,2.School of Water Resources and Environment,China). |
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| Abstract: | The variation of physiological characteristic parameters in Cd-induced stress on rice is complex and unobvious,which lead to subtle changes in spectral curve shape.Some methods were used to enhance and extract subtle spectral feature information associated with heavy metal pollution.Hyperspectral data of rice canopy and biochemical parameters were measured.Three methods were used,namely principal component analysis(PCA),independent component analysis(ICA) and fractal analysis.Spectral parameters sensitive t... |
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| Keywords: | rice under Cd contamination hyperspectral remote sensing principal component analysis independent component analysis fractal analysis multi-dimensional spectral diagnostic model |
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