计算机科学
相位展开
不连续性分类
噪音(视频)
结构光三维扫描仪
正确性
人工智能
轮廓仪
算法
绝对相位
可靠性(半导体)
相(物质)
投影(关系代数)
干涉测量
光学
相位噪声
图像(数学)
数学
材料科学
扫描仪
物理
表面光洁度
数学分析
量子力学
复合材料
功率(物理)
作者
Chao Zuo,Lei Huang,Minliang Zhang,Qian Chen,Anand Krishna Asundi
标识
DOI:10.1016/j.optlaseng.2016.04.022
摘要
In fringe projection profilometry (FPP), temporal phase unwrapping is an essential procedure to recover an unambiguous absolute phase even in the presence of large discontinuities or spatially isolated surfaces. So far, there are typically three groups of temporal phase unwrapping algorithms proposed in the literature: multi-frequency (hierarchical) approach, multi-wavelength (heterodyne) approach, and number-theoretical approach. In this paper, the three methods are investigated and compared in detail by analytical, numerical, and experimental means. The basic principles and recent developments of the three kind of algorithms are firstly reviewed. Then, the reliability of different phase unwrapping algorithms is compared based on a rigorous stochastic noise model. Furthermore, this noise model is used to predict the optimum fringe period for each unwrapping approach, which is a key factor governing the phase measurement accuracy in FPP. Simulations and experimental results verified the correctness and validity of the proposed noise model as well as the prediction scheme. The results show that the multi-frequency temporal phase unwrapping provides the best unwrapping reliability, while the multi-wavelength approach is the most susceptible to noise-induced unwrapping errors.
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