Deformation measurements of dragonfly's wings in free flight by using Windowed Fourier Transform

被引：17

作者：

Cheng, Peng ^{[1
]}

Hu, Jinsong ^{[1
]}

Zhang, Guofeng ^{[1
]}

Hou, Lei ^{[1
]}

Xu, Boqin ^{[1
]}

Wu, Xiaoping ^{[1
]}

机构：

[1] Univ Sci & Technol China, Dept Mech & Mech Engn, Hefei 230027, Anhui, Peoples R China

来源：

OPTICS AND LASERS IN ENGINEERING | 2008年 / 46卷 / 02期

基金：

中国国家自然科学基金;

关键词：

dragonfly in free flight; grating projection; Windowed Fourier Transform; weighted least-squares phase unwrapping;

D O I：

10.1016/j.optlaseng.2007.08.001

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Grating Projection method was used to measure the height distribution of dragonfly's wings in free flight. Then the fringe patterns on the dragonfly were recorded by a high-speed CCD camera. Since the fringe patterns recorded in such a way have poor contrast and brightness, Windowed Fourier Transform (WFT), which is insensitive to noise and fringe amplitude, was used to process the fringe patterns to extract the phase. Finally, the height distributions of dragonfly's wings in free flight were obtained by using the Weighted Least-Squares Phase Unwrapping method. The choice of integration limits and the size-of the window of WFT are briefly discussed here (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：157 / 161

页数：5

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