Spatiotemporal optimization on cross correlation for particle image velocimetry

doi:10.1063/5.0091839

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	Spatiotemporal optimization on cross correlation for particle image velocimetry
	Xie ZM(谢宗明); Wang HP(王洪平); Xu D(徐多)
发表期刊	PHYSICS OF FLUIDS
	2022-05
卷号	34 期号:5 页码:55105
ISSN	1070-6631
摘要	We introduce an optimization method for the cross-correlation operation in particle image velocimetry by locating the correlation peaks assisted with constraint conditions. In this study, an objective function was constructed to include the residual of the normalized cross-correlation term, a component in charge of spatial smoothness (inspired by the optical flow method as used in a previous study) and a component for temporal smoothness (inspired by the concept of trajectory selection in particle tracking velocimetry). Minimizing the objective function gives optimized velocity fields for a series of tracer images for spatiotemporal smoothness. The proposed method was examined in synthetic images of turbulent flow and Batchelor vortex and in a laboratory experiment of vortex rings. The effect of image background noises and the initial guess for the optimization process were examined and discussed. Published under an exclusive license by AIP Publishing.
学科领域	Mechanics ; Physics, Fluids & Plasmas
DOI	10.1063/5.0091839
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000810788800004
项目资助者	NSFC Basic Science Center Program [11988102] ; National Natural Science Foundation of China [92152106] ; Chinese Academy of Sciences [E1Z10101]
论文分区	一类/力学重要期刊
力学所作者排名	1
RpAuthor	徐多
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/90207
专题	非线性力学国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Xie ZM,Wang HP,Xu D. Spatiotemporal optimization on cross correlation for particle image velocimetry[J]. PHYSICS OF FLUIDS,2022,34,5,:55105.
APA	谢宗明,王洪平,&徐多.(2022).Spatiotemporal optimization on cross correlation for particle image velocimetry.PHYSICS OF FLUIDS,34(5),55105.
MLA	谢宗明,et al."Spatiotemporal optimization on cross correlation for particle image velocimetry".PHYSICS OF FLUIDS 34.5(2022):55105.

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