Digital image correlation with gray gradient constraints: Application to spatially variant speckle images

	Digital image correlation with gray gradient constraints: Application to spatially variant speckle images
	Yuan, Yuan 1; Zhan, Qin 1; Huang, Jianyong 1; Fang, Jing 1; Xiong, Chunyang 1
刊名	Optics and Lasers in Engineering
	2016
卷号	77 页码:85-91
关键词	ENDMEMBER EXTRACTION ALGORITHMS INITIALIZATION NMF
通讯作者	Huang, Jianyong
英文摘要	Abstract As a carrier of local deformation information, speckle pattern inside a subset is usually crucial for surface displacement acquisition based upon a digital image correlation (DIC) method, since both accuracy and precision of DIC method are closely related to the amount of speckle information in a subset. Although some comprehensive theoretical frameworks have been developed to estimate the quality of local speckle patterns, it is still a great challenge how to effectively integrate the subset speckle information into the well-developed correlation criteria used for DIC. By means of a well-designed square window function, we here propose the concept of continuous subset in order to modulate subset size in a continuously derivable manner. Afterwards, we further develop a new constrained zero-normalized sum-of-squared differences (CZNSSD) criterion and construct the corresponding iterative algorithm, based on which the subset size involved can be automatically determined according to the necessary amount of speckle information. Numerical results of synthetic speckle images indicate that the set of algorithm can enhance the accuracy and precision of displacement measurement, especially for spatially variant speckle images. © 2015 Elsevier Ltd.
学科主题	Optics
类目[WOS]	Optics
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:20153401184127
内容类型	期刊论文
源URL	[http://ir.radi.ac.cn/handle/183411/39446]
专题	遥感与数字地球研究所_SCI/EI期刊论文_期刊论文
作者单位	1. College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai, China 2. Key Laboratory of Digital Earth, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing, China 3. College of Engineering, Peking University, Beijing, China 4. Department of Biomedical Engineering, Duke University, Durham 5.NC, United States
推荐引用方式 GB/T 7714	Yuan, Yuan,Zhan, Qin,Huang, Jianyong,et al. Digital image correlation with gray gradient constraints: Application to spatially variant speckle images[J]. Optics and Lasers in Engineering,2016,77:85-91.
APA	Yuan, Yuan,Zhan, Qin,Huang, Jianyong,Fang, Jing,&Xiong, Chunyang.(2016).Digital image correlation with gray gradient constraints: Application to spatially variant speckle images.Optics and Lasers in Engineering,77,85-91.
MLA	Yuan, Yuan,et al."Digital image correlation with gray gradient constraints: Application to spatially variant speckle images".Optics and Lasers in Engineering 77(2016):85-91.