Noise-tolerant fringe evaluation using statistical fringe processing

Authors

  • Mario Juvenal S. Onglao III ⋅ PH National Institute of Physics, University of the Philippines Diliman
  • Percival F. Almoro ⋅ PH National Institute of Physics, University of the Philippines Diliman

Abstract

In optical studies, fringe patterns often appear due to interference effects and the phase unwrapping process.  The analysis of these fringe patterns is negatively affected by the presence of speckle noise, which tends to degrade the edge structures on the fringe pattern. In recent works, a statistical fringe processing algorithm that analyzes local spatial frequencies has been used in analyzing optical vortices and material sub-surface defects. In this study, the statistical algorithm is applied to noise-tolerant evaluation of fringes by determining the transverse position and boundary of the fringe pattern. The effects of a key parameter in the algorithm, the scanning window size, is demonstrated. The performance of the technique for various degrees of signal noise is also investigated.  This technique may have applications in segmentation of fringe patterns.

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Issue

Article ID

SPP-2023-PC-14

Section

Poster Session C (Mathematical Physics, Optics, and Interdisciplinary Topics)

Published

2023-07-06

How to Cite

[1]
MJS Onglao and PF Almoro, Noise-tolerant fringe evaluation using statistical fringe processing, Proceedings of the Samahang Pisika ng Pilipinas 41, SPP-2023-PC-14 (2023). URL: https://proceedings.spp-online.org/article/view/SPP-2023-PC-14.