二进制数
计算机科学
准确度和精密度
谐波
高维
航程(航空)
灵活性(工程)
算法
材料科学
人工智能
物理
数学
算术
量子力学
电压
复合材料
统计
作者
Yajun Wang,Jae-Sang Hyun,Song Zhang,Bin Luo,Ziping Liu,Chufan Jiang,Bo Tao
标识
DOI:10.1016/j.optlastec.2020.106103
摘要
The binary defocusing technique has enabled speed breakthroughs for 3D shape measurement, yet simultaneously achieving high accuracy and high speed remains difficult. To overcome this limitation, we propose to utilize multilevel symmetric pattern for high-speed and high-accuracy 3D shape measurement. Compared to conventional binary patterns, multilevel pattern could bring more flexibility for eliminating undesired high-frequency harmonics, thus has the potential to greatly enhance the phase quality and measurement accuracy. In this paper, the symmetric pattern design principle and related optimization procedure are presented in order to find the “best” multilevel fringe patterns. Both simulation and experiments verify that with respect to conventional methods, the proposed method could consistently generate better fringe patterns for a wide range of fringe periods. Furthermore, we developed an absolute 3D shape measurement system with the speed of 667 Hz, verifying that the proposed method is applicable for high-speed, high-accuracy applications.
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