曲波变换在航空伽马能谱数据处理中的应用研究  

Application Effect of Curvelet Transform in Airborne Gamma Spectrum Data Processing

作　　者：李兵海 卢亚运 张光雅 李江坤[1] 叶发旺[2] 童勤龙[2] 张翔[1] LI Binghai;LU Yayun;ZHANG Guangya;LI Jiangkun;YE Fawang;TONG Qinlong;ZHANG Xiang(Airborne Survey and Remote Sensing Center of Nuclear Industry,Shijiazhuang,Hebei 050002,China;Beijing Research Institute of Uranium Geology,Beijing 100029,China)

机构地区：[1]核工业航测遥感中心,河北石家庄050002 [2]核工业北京地质研究院,北京100029

出　　处：《世界核地质科学》2023年第4期963-973,共11页World Nuclear Geoscience

基　　金：核能开发项目“基于航空高光谱与伽玛能谱的铀矿勘查技术研究”(编号:[2021]88)资助。

摘　　要：为提高航空伽马能谱数据的利用效果,进行了基于曲波变换的航空伽马能谱数据降噪研究,建立了一套基于曲波变换的航空伽马能谱数据降噪方法。利用曲波变换可以将航空伽马能谱数据重构为不同尺度的图件,适用于不同目的的数据解释,粗糙信息图件适用于区域场特征分析、迁移富集规律分析、补径排特征分析等;细节信息图件适用于航空伽马能谱异常分布规律及分类解释;精细信息图件适用于局部异常特征分析及异常解释。利用曲波变换多尺度和多方向的特点,可以在不降低分辨率,不损失局部异常信息的前提下去除其他降噪方法难于去除的沿测线方向不同尺度的条带,通过技术处理后的曲波重构数据,不产生边界效应。因此,曲波变换用于航空伽马能谱数据处理方面,具有快捷方便、信息损失少、成果丰富、效果较好的特点。In order to improve the utilization effect of airborne gamma data,research on noise reduction of airborne gamma data based on curvelet transform was carried out in this paper.A set of airborne gamma data noise reduction method based on curvelet transform was established.The airborne gamma data can be reconstructed into data of different scales by using the curvelet transform,which is suitable for data interpretation for different purposes.The coarse⁃scale data are suitable for the analysis of regional field characteristics,the analysis of migration enrichment patterns,and the characteristics of radial displacement analysis,etc.The fine⁃scale data are suitable for the distribution and classification of airborne gamma anomalies,and the ultra⁃fine⁃scale data are suitable for local anomaly feature analysis and anomaly interpretation;using the multi⁃scale and multi⁃directional characteristics of curvelet transform,bands of different scales along the survey line can be removed without losing local anomaly information or resolution deterioration,which is difficult for other noise reduction methods to achieve,and the curvelet reconstructed data after technical processing do not produce boundary effects. Therefore, curvelettransform in airborne gamma data processing is of the advantage of fast and convenient with lessinformation loss, rich results and better effects.

关 键 词：曲波变换 降噪 航空伽马能谱数据处理 

分 类 号：P631.64[天文地球—地质矿产勘探]