相位测量的不连续位置自适应分割  

Adaptive Discontinuity Segmentation in Phase Measurement

作　　者：邓高旭 刘梓豪 柯俐颖 周诗洋[3] 马立东 DENG Gaoxu;LIU Zihao;KE Liying;ZHOU Shiyang;MA Lidong(School of Mechanical Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China;Metrology Calibration Center,Weihai Desheng Technology Testing Co.,Ltd.,Weihai 264200,China;School of Mechanical Automation,Wuhan University of Science and Technology,Wuhan 430081,China)

机构地区：[1]太原科技大学机械工程学院,山西太原030024 [2]威海德生技术检测有限公司计量校准中心,山东威海264200 [3]武汉科技大学机械自动化学院,湖北武汉430081

出　　处：《光学精密工程》2024年第8期1252-1260,共9页Optics and Precision Engineering

基　　金：国家自然科学基金面上项目(No.52274389);博士科研启动基金(No.20222137)。

摘　　要：为了消除不连续位置对基于相位测量轮廓术三维重建精度的影响,提出了一种相位测量的不连续位置自适应分割方法。对该方法所采用的基于自适应方向相干性的相位不连续分割算法进行研究。首先,采用自适应方向相干图和平滑相位图确定不连续位置,即获得不连续区域与连续区域的灰度映射图。接着,将灰度映射图后处理为使用0-1表示的不连续区域与连续区域的掩码图。最后,将掩码图作为加权最小二乘相位展开方法的权重图将相对相位展开为绝对相位,所求解权重主要用以衡量包裹相位图中每个像素位置相位的质量。仿真结果表明:该自适应方向相干法对噪声方差为0.8的包裹相位图中直线和矩形不连续位置的分割平均误差分别为1.6783和3.0002个像素。实际相位测量轮廓实验也证明所提出方法可以有效分割包裹相位图不连续位置。所提出方法可实现对不连续位置的自适应分割以用于高精度的三维重建。To mitigate the impact of discontinuous positions on the accuracy of three-dimensional recon⁃struction using phase measurement profilometry,we introduced an adaptive segmentation method.This method was based on phase measurement and employed a phase discontinuity segmentation algorithm uti⁃lizing adaptive orientation coherence.Initially,we employed the adaptive orientation coherence map and the smooth phase map to identify discontinuous positions,that was,the grayscale map of the discontinu⁃ous area and the continuous area was obtained.Subsequently,the grayscale map was processed into a binary mask,representing discontinuous areas as 0 and continuous areas as 1.Lastly,this mask map served as a weight map in the weighted least squares phase unwrapping method to convert the relative phase into an absolute phase.The resulting weight primarily assessed the phase quality at each pixel position within the wrapped phase map.The simulation results show that the segmentation mean errors of the adaptive ori⁃entation coherence method for discontinuities of straight lines and rectangles in the wrapped phase map with noise variance of 0.8 are 1.6783 and 3.0002 pixels,respectively.The actual experiment also proves that the proposed method can effectively segment the discontinuities for high-precision 3D reconstruction.

关 键 词：机器视觉 加权最小二乘 不连续分割 掩码图 自适应后处理 

分 类 号：TP394.1[自动化与计算机技术—计算机应用技术]