国土资源遥感Issue(2)：70-74,5.
高光谱数据非监督分类的改进独立成分分析方法
An Improved Independent Component Analysis Method for Unsupervised Classification of Hyperspectral Data
摘要
Abstract
To solve the problem that the first - order and second - order statistics may be inadequate for obtaining a complete representation of the data, a high - order statistics - based method, kurtosis - based independent component analysis (KICA), is introduced to implement unsupervised classification of hyperspectral data. Aimed at the purpose that kurtosis can be very sensitive to outliers such as noise, the improved KICA (IKICA) model is proposed in the work when kurtosis is used as optimization criterion for the ICA problem. To evaluate the performance of the proposed algorithm and its application capability in unsupervised classification, IKICA is compared with maximum likelihood -based ICA and negentropy -based ICA, and the synthesized and real hyperspectral data acquired by Object Modularization Imaging Spectrometer (OMIS) and Pushbroom Hyperspectral Imager (PHI) are used. The results show that convergence speed and robustness are enhanced obviously and anti - noise capability is improved in the authors' work. The application result has high precision of classification.关键词
高光谱遥感/独立成分分析/峭度/非监督分类Key words
Hyperspectral remote sensing/ Independent component analysis (ICA)/ Kurtosis/ Unsupervised classification分类
计算机与自动化引用本文复制引用
李娜,赵慧洁..高光谱数据非监督分类的改进独立成分分析方法[J].国土资源遥感,2011,(2):70-74,5.基金项目
国家863计划项目(编号:2008AA121102和2007AA122167)、中国地质调查局地质调查项目(编号:1212010816033-3)和长江学者和创新团队发展计划项目(编号:IRT0705)共同资助. （编号:2008AA121102和2007AA122167）
