一种复合光栅投影的在线相位测量轮廓术

An On-line Phase Measurement Profilometry of Composite Grating Projection

摘要:

本文提出了一种复合光栅投影的在线相位测量轮廓术,以解决在像素匹配和相位计算过程中对条纹频率不同需求的矛盾。在像素匹配过程中，提取高频信息以获得质量较高的调制度图像；在相位计算过程中，通过滤波提取低频分量对被测物体进行三维重构，避开高频分量造成的误差。在滤波过程中，本文设计了一种组合滤波窗，提升了滤波精度。仿真和实验证明了所提方法的有效性和实用性，使用该方法重构物体的误差约为0.89%。

Abstract:

In this paper, an on-line phase measurement profilometry of composite grating projection is proposed to solve the contradiction between different requirements of fringe frequency in the process of pixel matching and phase calculation. In the pixel matching process, high-frequency information is extracted to obtain a high-quality modulation pattern; in the phase calculation process, low-frequency components are extracted through filtering for the three-dimensional reconstruction of the measured object, to avoid the error caused by high-frequency components. In the filtering process, a combined filtering window is designed in this paper to improve the filtering accuracy. Simulation and experiment prove the validity and feasibility of the proposed method. The error of the reconstructed object by this method is about 0.89%.