摘要
针对传统高光谱图像矿物识别方法未能充分利用矿物光谱诊断吸收特征与矿物光谱知识、识别过程人为干预多等问题,提出了一种基于光谱知识的高光谱图像自动识别方法.该方法引入了基于光谱吸收特征与波形特征的光谱知识作为自动识别的标准,利用连续统去除操作增强光谱吸收特征,采取基于光谱主次吸收特征的识别决策策略,建立多级约束准则以提高识别精度及避免误识别,通过利用模拟数据进行算法精度评价并应用航空高光谱成像仪AVIRIS(Airborne Visible/Infrared Imaging Spectrometer)数据进行应用分析与验证.结果表明:当图像信噪比大于200时,识别准确率可以达到80.3%,能够得到良好的识别结果以及较高的精度,并实现了基于高光谱图像的矿物自动识别.
In order to solve the problems of current methods for mineral recognition from hyperspectral da- ta, such as the requirement for prior information, the failure to make full use of absorption features and the lack of the automation of recognition process, an automatic recognition approach based on the spectral knowl- edge was proposed. The spectral knowledge library including the spectral information and absorption features was generated as the recognition standard, in which the absorption features were enhanced by removing the continuum of image spectra and library spectra as well. The decision method was proposed based on the major and minor absorption features, and a multi-constraint criterion was established to improve the recognition accu- racy and avoid the false recognition. The accuracy evaluation of the proposed approach was .performed on the simulated data and the airborne visible/infrared imaging spectrometer （AVIRIS） data as well. Experimental results show that the recognition accuracy reaches 80.3% when the signal-to-noise of image is higher than 200. Fine results with the high accuracy are obtained by the proposed approach, and the mineral automatic recognition from hyperspectral data is achieved simultaneously.
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
2012年第2期280-284,共5页
Journal of Beijing University of Aeronautics and Astronautics
基金
国家863计划资助项目(2008AA121102
2008AA12A201)
国家自然科学基金资助项目(61008047)
长江学者和创新团队发展计划资助项目(IRT0705)
关键词
高光谱遥感
自动识别
光谱吸收特征
hyperspectral remote sensing
automatic recognition
spectral absorption feature
