Filtering of Electronic Speckle Correlation Fringes

Abstract:

Speckle correlation fringes include a large quantity of speckle noise. It is first to consider how to reduce speckle noise before using phase formula to calculate. Filter is usually used to reduce speckle noise. From two aspects of frequency domain and space domain, we adopted mean filter, medium filter, Butterworth low-pass filter and homomorphism filter to process the speckle correlation fringes obtained by experiment. It is shown that the speckle correlation fringes are clearer and more easily interpreted and automatic processed after being filtered.

• Periodical: Applied Mechanics and Materials (Volumes 198-199)
• Pages: 1202-1207
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.198-199.1202
• Online since: September 2012
• Authors: Fei Guo, Mei Zhao, Xiu Ying Fan, Jin He Bao, Wen Bang Sun
• Keywords: Butterworth Low-Pass Filter, Homomorphism Filter, Mean Filter, Medium Filter, Speckle Correlation Fringes, Speckle Noise

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