Displacement measurements in micro-region with generalized digital speckle correlation method

被引：2
|
作者：
Li, XD [1 ]
Deng, B [1 ]
Shi, HJ [1 ]
机构：
[1] Tsing Hua Univ, Dept Engn Mech, Beijing 100084, Peoples R China
来源：
THIRD INTERNATIONAL CONFERENCE ON EXPERIMENTAL MECHANICS | 2002年 / 4537卷
关键词：
digital speckle correlation; displacement measurement; micro-region;
D O I：
10.1117/12.468866
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
High magnifying optics is now widely used in micro-region imaging, which leads to the special image structures on the recording plane, such as continue-gray distributions, large granules and spread structures. As a result, the deformation analyses are unreliable and divergent by using the conventional speckle correlation methods and these generalized speckle patterns. A new correlation algorithm, high-order gradient digital correlation method, has been proposed in this paper to measure the displacements in a micro-region. The performance of the proposed algorithm is illustrated using the generalized speckle patterns captured from the micro-regions.
引用
收藏
页码：366 / 369
页数：4
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