时间相位解包裹算法的抗噪性能对比研究  

Comparison on Noise Resistance of Temporal Phase Unwrapping Algorithms

作　　者：师力力 刘卫国[1] 田爱玲[1] 刘丙才[1] Shi Lili;Liu Weiguo;Tian Ailing;Liu Bingcai(School of Defence Science and Technology,Xi'an Technological University,Xi'an,Shaanxi 710021,China)

机构地区：[1]西安工业大学兵器科学与技术学院,陕西西安710021

出　　处：《激光与光电子学进展》2021年第12期393-400,共8页Laser & Optoelectronics Progress

基　　金：陕西省科技厅项目(2019KW-016)。

摘　　要：基于光栅条纹投影的三维测量技术通过相移法提取相位主值,相位主值展开的准确性是决定整个三维测量系统精度的关键因素。时间相位解包裹算法能够实现对孤立及表面不连续物体的相位展开,但受传感器及环境噪声的影响,得到的解相结果误差较大。为了选择出抗噪性能好的算法,本文通过仿真及实验对比了几种时间相位解包裹算法的抗噪性能。结果表明,多频层级相位展开法和负指数拟合法具有良好的抗噪性能,解相精度高,而多波长外差法和基于条纹定位的多波长外差法的抗噪性能差,解相误差大。本文的研究结果可为研究人员在选择解相方式上提供参考,具有重要的应用价值。Based on the three-dimensional(3D)measurement technology of grating fringe projection,phase principal values are extracted using the phase shift method.The accuracy of the phase principal value expansion is the key factor in determining the accuracy of the entire 3D measurement system.Temporal phase unwrapping algorithms can realize the phase unwrapping of isolated and discontinuous objects;however,owing to the influence of sensors and environmental noise,the phase unwrapping result has large errors.To select a good antinoise algorithm,herein,several temporal phase unwrapping algorithms were compared using simulations and experiments.Results show that the multi-frequency(hierarchical)phase unwrapping and negative exponential fitting methods exhibit good antinoise performance and high phase resolution accuracy.Alternatively,the multi-wavelength(heterodyne)method and multi-wavelength(heterodyne)method based on the fringe location exhibit a poor antinoise performance and large phase errors.The findings of this study can provide guidance to researchers in selecting phase decomposition algorithms,and they have important application values.

关 键 词：测量 条纹投影 相位主值 时间相位解包裹 三维测量 抗噪性能 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]