基于调制度层析的在线三维测量方法  

An On-Line 3D Measurement Method Based on Modulation Delamination

作　　者：郑旭[1] 曹益平[1] 李坤[1] 

机构地区：[1]四川大学光电科学技术系,四川成都610064

出　　处：《光学学报》2010年第9期2573-2577,共5页Acta Optica Sinica

基　　金：国家863计划(2007AA01Z333);国家重大专项(2009ZX02204-008);四川省学术和技术带头人培养基金(07GRC-01)的资助课题

摘　　要：调制度反映相位展开可靠性的程度,与物体本身灰度和形状有着紧密的关系,因此可作为测量的特征标记。提出了一种采用调制度层析实现在线三维测量的方法。通过投影一固定的正弦条纹到待测运动物体上,借助物体运动可产生等效的相移变形条纹。利用基于傅里叶变换轮廓术调制度模型计算各帧等效的相移变形条纹的调制度,并采用层析方法从各帧调制度分离出反映待测物体的调制度层析特征,以该层析信息作为特征模板,实现像素匹配,从而获取各帧具有一致像素坐标的等效相移变形条纹,实现在线移动物体的三维面形测量。实验证明了该方法的可行性和实用性。Modulation is used to scalage the phase unwrapping reliability and it is related to the measured object′s gray and shape informations. A novel on-line three-dimentional （3D） shape measurement method based on modulation delamination is presented. While one sinusoidal fringe is projected on the measured object,the deformed patterns with equivalent phase shift are captured as the measured object moves. The corresponding modulation distributions to the deformed patterns can be obtained by Fourier transform profilometry. A modulation delamination method is used to extract a token from modulation distributions as the mask,and the pixels matching can be realized so as to achieve the equivalent phase-shift deformed patterns at the same pixel coordinate. So the on-line 3D shape measurement is realized. Experimental results show the feasibility and validity of the measurement method.

关 键 词：信息光学 在线三维测量 调制度 像素匹配 相位展开 Stoilov相移算法 

分 类 号：TN247[电子电信—物理电子学]