一种基于多尺度带通滤波的洁化算法与GPU实现  

A CLEAN Algorithm Based on Multi-Scale Bandpass Filter and Its GPU Implemention

作　　者：梅盈 邓辉 张晓丽[4] 王锋[1,3,2] 陈腾达[4] Mei Ying;Deng Hui;Zhang Xiaoli;Wang Feng;Chen Tengda(Yunnan Observatories.Chinese Academy of Sciences.Kunming 650011.China;Kunming University of Science and Technology.Kunming 650500.China;Center of Astrophysics.Guangzhou University.Guangzhou 510006.China;University of Chinese Academy of Sciences.Beijing 100049.China)

机构地区：[1]中国科学院云南天文台,云南昆明650011 [2]中国科学院大学,北京100049 [3]广州大学天体物理中心,广东广州510006 [4]昆明理工大学,云南昆明650500

出　　处：《天文研究与技术》2018年第3期285-291,共7页Astronomical Research & Technology

基　　金：国家重点基础研究发展计划(973计划)(2016YFE0100300);国家自然科学天文联合基金(U1531132,U1631129,U1231205);国家自然科学基金(11403009,11463003,1177301)资助

摘　　要：中国新一代射电频谱日像仪——明安图射电频谱日像仪以高时间、高空间、高频率分辨率工作在0.4 GHz^15 GHz,为太阳爆发活动初始能量释放区的物理过程、太阳电子加速等研究开辟了新的窗口。高性能、高质量太阳成像算法是日像仪数据处理流水线至关重要的研究内容。参考法国墨东天文台太阳干涉阵的数据处理方法,系统讨论分析了多尺度洁化(Multi-Scale CLEAN)算法,给出了适用于日像仪的多尺度洁化算法参数,并重点讨论了算法的图形处理器并行实现。实验结果表明,改进的多尺度洁化在算法效率上比基于图形处理器实现的H9gbom CLEAN提高了近3倍,有效提高了整个数据处理流水线的性能。China′s new generation radio telescope-The Mingantu Ultrawide SpEctral Radioheliograph(MUSER)generates high-quality radio images with high temporal,high spatial,and high spectral resolutions in the frequency range of 400MHz-15GHz.The MUSER will provide a new observational window on researches such as solar activities and solar electron accelerations.High-performance and high-quality imaging form a significant part in aspect of MUSER′s massive data processing requirements.Referring to the data processing method of the MEUDON observatory in France,we give a detailed analysis of multi-scale CLAEN.Appropriate parameters are given for MUSER CLEAN and the implementation based on GPU is presented.The experimental results show that the multi-scale CLAEN is nearly three times faster than the previously realized H gbom CLEAN,which will improve the performance of the whole data processing system effectively.

关 键 词：多尺度洁化 射电成像 图形处理器 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]