辽西钼多金属矿床遥感影像线性体自动提取及成矿有利度分析

Automatic Extraction and Ore-forming Favorability Analysis of Linear Form in Remote Sensing Image of Molybdenum Polymetallic Deposit in Liaoxi Area

通过采用线性拉伸增强→边缘检测增强→优选图像最佳值为阀值进行二值化→矢栅转换→拓扑重建→干扰信息剔除→遥感影像线性体分布图的流程方法，成功地自动提取了辽西钼多金属矿床遥感影像线性体，且通过线性体长度-频数、线性体方位-频数及构造强度分析，得出提取数据地质上的有效性。最后运用证据权重法得出构造线性体与矿床的关系，即构造强度分级4～7为最佳致矿异常上下限。

This paper studied the automatic extraction of linear form in remote sensing image of molybdenum polymetallic deposit in Liaoxi area by this flow direction： linear extension enhancement,edge detection,Binarization by choosing a cutoff value,transition from raster to vector,building a topology,removing the disturbing information, extraction the linear form. The validity of extracted data was analyzed by the relationship between length and frequency of linear form,the relationship between azimuth and frequency of linear form and the structure intensity analysis. The relationship between structural linear form and deposit was studied by weight of evidence; the results showed that optimal ore-forming structure intensity is between 4 and 7.