基于改进差分进化算法的机载激光雷达波形分解
投稿时间:2020-04-15  修订日期:2021-05-12  点此下载全文
引用本文:赖旭东,袁逸飞,徐景中,王明威.基于改进差分进化算法的机载激光雷达波形分解[J].红外与毫米波学报,2021,40(3):381~390].LAI Xu-Dong,YUAN Yi-Fei,XU Jing-Zhong,WANG Ming-Wei.LiDAR waveform decomposition based on modified differential evolution algorithm[J].J.Infrared Millim.Waves,2021,40(3):381~390.]
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作者单位E-mail
赖旭东 武汉大学遥感信息工程学院湖北 武汉 430079
自然资源部地理国情监测重点实验室湖北 武汉 430079 
laixudong@whu.edu.cn 
袁逸飞 武汉大学遥感信息工程学院湖北 武汉 430079  
徐景中 武汉大学遥感信息工程学院湖北 武汉 430079 jz_xu@whu.edu.cn 
王明威 中国地质大学地质调查研究院湖北 武汉 430074  
基金项目:国家自然科学基金(41771368、41671450)。
中文摘要:全波形机载激光雷达数据记录了完整的回波波形,包含了目标的立面细节和后向散射系数等信息,但是这些信息无法在未经处理的情况下直接获取,波形分解是处理波形数据以提取有效信息的重要方法。针对波形分解中常用的参数优化算法对初值敏感,易陷于局部最优的缺点,提出一种基于改进差分(Modified Differential Evolution, MDE)算法的波形分解方法:以广义高斯函数为模型,在预估初值后,将全局优化的MDE算法用于参数优化,最终生成点云。实验结果表明,与基于其他优化算法的波形分解方法相比,该方法在分解精度以及点位精度等方面都有提高。
中文关键词:激光雷达  全波形  波形分解  参数优化  改进差分进化算法
 
LiDAR waveform decomposition based on modified differential evolution algorithm
Abstract:Full-waveform airborne LiDAR (FWL) is able to record complete echo signals as waveforms, including useful information such as elevation details and backscatter coefficients of the target, but the waveform information data cannot be obtained directly. Waveform decomposition is an important method to process waveform data to extract effective information. In view of the shortcoming of common used parameter optimization algorithm in waveform decomposition which is sensitive to initial value and prone to local optimization, a waveform decomposition method based on Modified Differential Evolution (MDE) algorithm is proposed: the generalized Gaussian function is taken as the model, after the initial estimation, a global MDE optimization algorithm is used for the parameter optimization, and the point cloud is finally generated. Experimental results show that, compared with the waveform decomposition method based on other optimization algorithms, this method has been obviously improved in terms of the decomposition and point position accuracy.
keywords:LiDAR  full-waveform  waveform decomposition  optimization algorithm  modified differential evolution algorithm
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