Digital speckle correlation method based on multi-scale wavelet

被引：0
|
作者：
Li, Xin-zhong [1 ,3 ]
Tai, Yu-ping [2 ]
Nie, Zhao-gang [4 ]
机构：
[1] Henan Univ Sci & Technol, Sch Phys & Engn, Luoyang 471003, Peoples R China
[2] Henan Univ Sci & Technol, Sch Chem Engn & Pharmaceut, Luoyang 471003, Peoples R China
[3] Luoyang Key Lab Photoelect Funct Mat, Luoyang 471003, Peoples R China
[4] Nanyang Technol Univ, Sch Phys & Math Sci, Div Chem & Biol Chem, Singapore 637371, Singapore
来源：
OPTIK | 2013年 / 124卷 / 18期
基金：
中国国家自然科学基金;
关键词：
Speckle correlation; Wavelet transform; Multi-scale; Image processing; DISPLACEMENT;
D O I：
10.1016/j.ijleo.2012.12.011
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
In this paper, the DSCM based on multi-scale wavelet transform (WT) was proposed. Firstly, the speckle pattern sequences generated by the sample were recorded before and after displacement. And then, these speckle patterns were multi-level decomposed used by sym8 and db4 wavelet family, respectively. Next step, correlation searching was conducted using their approximate profiles and obtained the displacement. Finally, we got a high precision results quickly. In comparison with the traditional DSCM, the correlation calculation efficiency of this new method is improved dramatically, at the same time, it could keep higher resolution. (C) 2013 Elsevier GmbH. All rights reserved.
引用
收藏
页码：3777 / 3779
页数：3
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