Accurate and simple digital volume correlation using pre-interpolation

doi:10.1088/1361-6501/ab85b0

	Accurate and simple digital volume correlation using pre-interpolation
	Li,Chengsheng 1,2; Shu,Rongjun 1,2
刊名	Measurement Science and Technology
	2020-06-10
卷号	31 期号:9
关键词	digital volume correlation pre-interpolation nearest sub-volume offset cubic spline
ISSN号	0957-0233
DOI	10.1088/1361-6501/ab85b0
英文摘要	AbstractExisting incremental digital volume correlation methods can reduce the number of errors introduced by interpolation calculations in the inverse-compositional Gauss–Newton (IC-GN) algorithm iteration. However, the accuracy of these existing methods is insufficient for some conditions as the curve-fitting method has high computational efficiency but lacks accuracy. A simple pre-interpolation method is proposed to improve the accuracy and computational efficiency of digital volume correlation. First, the pretreatment of a deformed volume image is calculated by the cubic spline interpolation method with the most often chosen interpolation step of 1/2 sub-voxel. Next, the pre-interpolation is calculated only once and the block calculation techniques solve the memory problem. Then, the reference sub-volume in the updated reference volume image is translated into the nearest half-integer voxel position instead of the integer voxel position or other sub-voxel positions. The pre-interpolation method is applied to both the IC-GN algorithm and the curve-fitting method. Experimental results show that the maximum mean bias error and the maximum standard deviation of the improved IC-GN algorithm are reduced by 34% and 75%, respectively. The improved curve-fitting has better accuracy and computational efficiency than the IC-GN algorithm under small strain and the curve-fitting method can achieve about 3.2 times speedup than the IC-GN algorithm.
语种	英语
出版者	IOP Publishing
WOS记录号	IOP:0957-0233-31-9-AB85B0
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/15568]
专题	中科院武汉岩土力学所
通讯作者	Li,Chengsheng
作者单位	1.University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China 2.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, People’s Republic of China
推荐引用方式 GB/T 7714	Li,Chengsheng,Shu,Rongjun. Accurate and simple digital volume correlation using pre-interpolation[J]. Measurement Science and Technology,2020,31(9).
APA	Li,Chengsheng,&Shu,Rongjun.(2020).Accurate and simple digital volume correlation using pre-interpolation.Measurement Science and Technology,31(9).
MLA	Li,Chengsheng,et al."Accurate and simple digital volume correlation using pre-interpolation".Measurement Science and Technology 31.9(2020).