摘要
从原理、模型试验及实际数据处理等方面分析对比了比值法、光谱角法及主分量分析法的优劣;选择了以主分量分析为主、光谱角法为辅进行蚀变遥感异常的提取;引用了误差理论某些基本概念,以标准离差σ作为遥感异常切割的尺度;建立了"去干扰异常主分量门限化技术流程"。以西藏驱龙—甲马蚀变遥感异常群为例,展示了此技术的效果,并与高光谱研究结果进行了比较。
This is the second paper among the serial articles on the new parameter for the prediction of the mineral resources: alteration RS anomalies. The RM (Ratio Method),SAM (Spectral Angle Mapper)and PCA (Principle Component Analysis) were compared with each other by the analysis of their principles and by the model test. PCA was selected as the main method and SAM as the supplementary one. The essential concepts of the error theory were quoted. The standard deviation σ was used as the measure for anomaly slicing. The flow chart 'De-interfered Anomalous Principal Component Thresholding Technique' was given. A practical application example for Qulong-Jiama anomaly group in Tibet was given in comparison with the hyperspectral results.
出处
《国土资源遥感》
CSCD
2003年第2期44-49,I002,共7页
Remote Sensing for Land & Resources
基金
中国地质调查局"西部主要成矿带遥感找矿异常提取及应用研究"项目(200215000008)资助。
