Journal
OPTICS COMMUNICATIONS
Volume 312, Issue -, Pages 312-318Publisher
ELSEVIER
DOI: 10.1016/j.optcom.2013.09.049
Keywords
Interferometric particle imaging (IPI); Erosion match; Fourier transform; Modified Rife algorithm
Categories
Funding
- National Natural Science Foundation of China [61275019]
- 2011 Project of State Key laboratory of Engines [K2011-10]
Ask authors/readers for more resources
A method of high accuracy estimation of fringes number/fringes frequency of inrerferogram based on erosion march and the Fourier transform technique is proposed. The edge images of the interference pattern of particles and the particle mask image are detected respectively by erosion operating firstly and then subtracted with the respective original image, and the center coordinate of particles can be extracted through the 2D Correlation operation for the two edge images obtained. The interference pattern of each particle can then be achieved using the center coordinate, the shape and size of the particle image. The number of fringes/fringe spacing of the interferogram of the particle is extracted by Fourier transform and the modified Rife algorithm, and sub-pixel accuracy of the extracted frequency is acquii ed. Its performance is demonstrated by numerical simulation and experimental measurement. The measurement uncertainty is +/- 0.91 mu m and the relative error 1.13% for the standard particle of diameter 45 mu m. The research results show that the algorithm presented boasts high accuracy for particle sizing as well as location measurement. (c) 2013 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available