A Method to Extract Content of Minerals Based on Measured Hyperspectral Data
WANG Ya-jun1,2,3, WANG Qin-jun1*, CHEN Yu1, HU Fang1,2, XU Ru1,2, LIN Qi-zhong1
1. Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing 100094, China 2. University of Chinese Academy of Sciences，Beijing 100049，China 3. North China Power Engineering Co. Ltd. of China Power Engineering Consulting Group, Beijing 100120, China
Abstract：To improve the accuracy of mineral content extraction by linear decomposition model, a method was established, which took rock spectra with wavelength from 350 to 2 500 nm as the data source, identified minerals based on spectral matching methods, applied Hapke model to transform spectral reflectance into single scattering albedo and resolved single scattering albedo to get mineral content. In this method, sectional noise filtering and regional mineral spectra library were added to improve the identifying accuracy. Based on the analysis on the fifth Baogutu rock body, compared with XRD results, accuracies of quartz, feldspar class and altered minerals identification were 75%, 100% and 92.2% separately. Accuracy of the content extraction of feldspar class, hornblende and altered minerals were 80.5%, 64%, 92.36% separately. This method added mineralogy symbiotic relationship into mineral identification to ensure the reliability, proposed the idea of sectional noise filtering to avoid the influence of filtering algorithm, applied the single scattering albedo to avoid the complex nonlinearly calculations to improve the accuracy theoretically. This method has a certain guiding significance for the work such as rapid analysis of alteration information.
王亚军1,2，3，王钦军1*，陈 玉1，胡 芳1,2，徐 茹1,2，蔺启忠1 . 基于实测高光谱数据的矿物含量提取方法研究 [J]. 光谱学与光谱分析, 2015, 35(06): 1700-1704.
WANG Ya-jun1,2,3, WANG Qin-jun1*, CHEN Yu1, HU Fang1,2, XU Ru1,2, LIN Qi-zhong1 . A Method to Extract Content of Minerals Based on Measured Hyperspectral Data. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2015, 35(06): 1700-1704.
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