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针对不同混合背景下蚀变矿物信息提取技术的响应程度这一问题,基于图像模拟,采用比值法(RM)、主成分分析法(PCA)和光谱角匹配法(SAM)3种蚀变矿物信息提取技术针对两种蚀变矿物(羟基、铁染)在模拟野外地物混合背景的情形下进行提取实验,并进行响应程度的定量统计和对比分析。结果表明:无论是纵向(不同算法之间)还是横向(同种算法针对不同种矿物蚀变信息)的算法响应程度均存在差异性,通过寻找响应程度的大致相同区间,可以在彼此间建立联系的纽带。不同的响应程度对应的丰度值能够反映不同算法针对两种蚀变矿物信息所能提取出来的大致混合背景。实验结果对于在不同混合背景下的合理选取算法及算法提取效果的对比评价等方面都具有实际参考价值。
According to the problem of response to the technology of information extraction of altered minerals under different mixed background, based on the image simulation, three kinds of alteration mineral information (RM), PCA (Principal Component Analysis) and Spectral Angle Matching (SAM) Extraction technology for the two kinds of alteration minerals (hydroxyl, iron staining) in the simulation of the mixed background of field data extraction experiments, and the degree of response quantitative statistics and comparative analysis. The results show that there are some differences in the response of the algorithm both in vertical direction (between different algorithms) and in horizontal direction (the same kind of algorithm aims at different kinds of mineral alteration information). By finding roughly the same interval of response degree, The bond. Abundance values corresponding to different response levels can reflect the roughly mixed background that different algorithms can extract for the two kinds of altered mineral information. The experimental results have practical reference value for the reasonable selection algorithm in different mixed backgrounds and the comparative evaluation of the algorithm extraction effects.