2019
DOI: 10.3390/rs11020126
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Efficient Lidar Signal Denoising Algorithm Using Variational Mode Decomposition Combined with a Whale Optimization Algorithm

Abstract: Although lidar is a powerful active remote sensing technology, lidar echo signals are easily contaminated by noise, particularly in strong background light, which severely affects the retrieval accuracy and the effective detection range of the lidar system. In this study, a coupled variational mode decomposition (VMD) and whale optimization algorithm (WOA) for noise reduction in lidar signals is proposed and demonstrated completely. The combination of optimal VMD parameters of decomposition mode number K and q… Show more

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Cited by 56 publications
(34 citation statements)
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“…Naturally, Lidar data are highly vulnerable and easily affected by noise [26]. Different scholars have been studying the factors which affect the Lidar data regarding structural health monitoring [13,27].…”
Section: Introductionmentioning
confidence: 99%
“…Naturally, Lidar data are highly vulnerable and easily affected by noise [26]. Different scholars have been studying the factors which affect the Lidar data regarding structural health monitoring [13,27].…”
Section: Introductionmentioning
confidence: 99%
“…VMD is a very simple and fast method for signal adaptive decomposition that can decompose a real value signal into an ensemble of modes with a central frequency, and it has optimality in dealing with noise because of its close relations to the Wiener filter [17]. However, penalty parameter α and mode number K in VMD need to be predefined, and these two values have an important impact on VMD [18]. Although the parameters can be determined by the trial-and-error method or through experience, these options are time-consuming and inefficient because of the wide range of choices.…”
Section: Introductionmentioning
confidence: 99%
“…The variational mode decomposition (VMD) technique can achieve a nice smoothing effect using its Wiener filtering characteristics. The research results show that the VMD combined with whale optimization algorithm (VMD-WOA) can also achieve better results in LiDAR signal denoising [12]. The common point of the above methods is that the LiDAR signal is decomposed into a series of components and removed the high-frequency components containing noise to realize the denoising.…”
Section: Introductionmentioning
confidence: 99%