Eliminating zero spectra in Fourier transform profilometry by application of Hilbert transform

2016 ◽  
Vol 365 ◽  
pp. 76-85 ◽  
Author(s):  
Feng Luo ◽  
Wenjing Chen ◽  
Xianyu Su
Keyword(s):  
Fourier Transform ◽  
Hilbert Transform ◽  
Fourier Transform Profilometry

3D Profile Variety Measurement of Pectoral Fin in Fish Fast Start

2011 ◽  
Vol 83 ◽  
pp. 280-284
Author(s):  
Ming Jiang ◽  
Shu Zhang ◽  
Xiao Yuan He
Keyword(s):  
Fourier Transform ◽  
High Speed ◽  
Kinetic Characteristic ◽  
Three Dimensional ◽  
Pectoral Fin ◽  
Fourier Transform Profilometry ◽  
Fast Start ◽  
Fringe Patterns ◽  
3D Information ◽  
3D Profile

Fast-starts are brief, sudden accelerations used by fish during predator-prey encounters. In this paper, a three-dimensional (3D) test and analysis method is critical to understand the function of the pectoral fin during maneuvers. An experiment method based on Fourier Transform Profilometry for 3D pectoral fin profile variety during fish maneuvers is proposed. This method was used in a carp fast-start during prey. Projecting the moiré fringes onto a carp pectoral fin it will produce the deformed fringe patterns contain 3D information. A high speed camera captures these time-sequence images. By Fourier transform, filter, inverse Fourier transform and unwrap these phase maps in 3D phase space, the complex pectoral fin profile variety were really reconstructed. The present study provides a new method to quantify the analysis of kinetic characteristic of the pectoral fin during maneuvers.

Dynamic microscopic 3D shape measurement based on marker-embedded Fourier transform profilometry

2018 ◽  
Vol 57 (4) ◽  
pp. 772 ◽  
Author(s):  
Yan Hu ◽  
Qian Chen ◽  
Yuzhen Zhang ◽  
Shijie Feng ◽  
Tianyang Tao ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Shape Measurement ◽  
3D Shape ◽  
3D Shape Measurement ◽  
Fourier Transform Profilometry
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