摘要
本文通过反复试验和对比研究,最终选择"掩膜高植被区+抑制中低植被区+比值+主成分变换+密度分割"方法提取研究区内的蚀变信息。野外验证表明,该方法在植被覆盖区提取的蚀变图斑与研究区内已知金矿化点及水系沉积物的金化探异常吻合较好,对金矿找矿具有重要的指导意义。
The study area with lush vegetation,which has a tropical monsoon climate,is not conducive to the use of traditional methods to extract alteration information,such as band ratio,principal component analysis,etc.Through many trials and contrast analysis,alteration anomaly information was extracted with remote sensing image by using the combining method of masking lush vegetation areas,suppressing middle and low vegetation coverage area,band ratio,principal component analysis and density segmentation.Field verification shows that alteration polygons extracted by this method is in accordance with gold mineralization points and stream sediment geochemical anomalies.The new method is helpful to gold exploration in lush vegetation area.
出处
《遥感信息》
CSCD
2014年第5期85-89,共5页
Remote Sensing Information
关键词
植被覆盖区
蚀变信息提取
植被掩膜
主成分变换
vegetation coverage area
extraction of alteration information
vegetation masking
principal component analysis(PCA)
