遥感信息
遙感信息
요감신식
2014年
5期
85-89
,共5页
路轩轩%朱谷昌%邹林%张远飞%窦雅娟
路軒軒%硃穀昌%鄒林%張遠飛%竇雅娟
로헌헌%주곡창%추림%장원비%두아연
植被覆盖区%蚀变信息提取%植被掩膜%主成分变换
植被覆蓋區%蝕變信息提取%植被掩膜%主成分變換
식피복개구%식변신식제취%식피엄막%주성분변환
vegetation coverage area%extraction of alteration information%vegetation masking%principal component analysis (PCA)
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。
本文通過反複試驗和對比研究，最終選擇“掩膜高植被區＋抑製中低植被區＋比值＋主成分變換＋密度分割”方法提取研究區內的蝕變信息。野外驗證錶明，該方法在植被覆蓋區提取的蝕變圖斑與研究區內已知金礦化點及水繫沉積物的金化探異常吻閤較好，對金礦找礦具有重要的指導意義。
본문통과반복시험화대비연구，최종선택“엄막고식피구＋억제중저식피구＋비치＋주성분변환＋밀도분할”방법제취연구구내적식변신식。야외험증표명，해방법재식피복개구제취적식변도반여연구구내이지금광화점급수계침적물적금화탐이상문합교호，대금광조광구유중요적지도의의。
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.
