Han Hao, Wu Shiqian, Song Zhan, Gu Feifei, Zhao Juan
Opt Express. 2021 Apr 26;29(9):12867-12879. doi: 10.1364/OE.421898.
Phase measuring deflectometry (PMD) is an effective technique for three-dimensional measurement of specular surfaces. However, the ambiguity of monoscopic PMD and the time-consuming searching process of stereoscopic PMD are challenges for specular surface reconstruction. To solve it, we propose an iterative reconstruction algorithm for the stereoscopic phase measuring deflectometry system free of the time-consuming searching process for each pixel. An arbitrary seed point on the specular surface is accurately obtained via a coarse-to-fine optimization means without any other expensive and complicate auxiliaries. Then, a plane with the height of seed point is set as the initial surface form for the iteration, in which the pinhole model is used to find the linear relation to update the surface form. The converging height is the output as the final result. Simulations and experiments verify the feasibility and efficiency of our proposed method based on the stereoscopic phase measuring deflectometry system. The accuracy and robustness are comprehensively evaluated as well.
相位测量偏折术（PMD）是一种用于镜面表面三维测量的有效技术。然而，单目PMD的模糊性以及立体PMD耗时的搜索过程是镜面表面重建面临的挑战。为了解决这一问题，我们提出了一种用于立体相位测量偏折术系统的迭代重建算法，该算法无需对每个像素进行耗时的搜索过程。通过粗到精的优化方法，无需任何其他昂贵且复杂的辅助设备，就能精确获得镜面表面上的任意种子点。然后，将具有种子点高度的平面设置为迭代的初始表面形式，其中使用针孔模型找到线性关系以更新表面形式。收敛高度作为最终结果输出。仿真和实验验证了我们基于立体相位测量偏折术系统提出的方法的可行性和效率。同时也对准确性和鲁棒性进行了全面评估。
