Pan Bing, Kemao Qian, Huang Lei, Asundi Anand
School of Mechanical and Aerospace Engineering, Nanyang Technological University, 639798, Singapore.
Opt Lett. 2009 Feb 15;34(4):416-8. doi: 10.1364/ol.34.000416.
The nonlinear intensity response of a digital fringe projection profilometry (FPP) system causes the captured fringe patterns to be nonsinusoidal waveforms and leads to an additional phase measurement error for commonly used three- and four-step phase-shifting algorithms. We perform theoretical analysis of the phase error owing to the nonsinusoidal waveforms. Based on the derived theoretical model, a novel and simple iterative phase compensation algorithm is proposed to compensate the nonsinusoidal phase error. Experiments show that the proposed algorithm can be used for effective phase error compensation in practical phase-shifting FPP.
数字条纹投影轮廓术（FPP）系统的非线性强度响应会使捕获的条纹图案成为非正弦波形，并导致常用的三步和四步相移算法产生额外的相位测量误差。我们对非正弦波形引起的相位误差进行了理论分析。基于推导的理论模型，提出了一种新颖且简单的迭代相位补偿算法来补偿非正弦相位误差。实验表明，该算法可用于实际相移FPP中的有效相位误差补偿。
