Statistical analysis of signal-to-noise ratios in fringe pattern matching

Abstract

The paper presents a statistical analysis of signal-to-noise ratios (SNRs) in fringe pattern matching. It shows theoretically that the SNR of interference fringes can be significantly improved by fringe pattern matching or mean square difference calculation based on statistical analysis. Computer simulation and experimental results have confirmed that the high accuracy of fringe pattern matching is due to the significant SNR improvements achieved.