光流检测技术具有高灵敏度、高精度的优点，且包含时间因子，适合动态测量，一经提出便成为研究热点，但大都用于运动分析。光流变形测量的研究很少，光流面形测量还是空白。虽然面形测量与变形测量属于不同领域，但是二者具有条纹的共性。从光流的观点来看，条纹的动态变化对应着条纹的光流场。本项目拟采用投影条纹或干涉条纹形成的光流进行面形和变形测量，探讨光流与被测点的空间运动之间的理论关系，建立理论模型。将理论模型应用于变形测量中，揭示光流与三维变形之间的理论关系；将理论模型用于面形测量，阐明光流与面形高度或面形相位分布之间的理论关系，揭示非平行含噪声投影条纹、非均匀反射参考面或物面等各种复杂实验因素的作用，提出解决的对策。通过数值模拟和实验验证，揭示光流测量的实验技术特点，阐明光流方法在面形和变形测量中的适应范围、灵敏度、测量精度等重要参量，实现以条纹光流为基础的面形以及变形动态测量技术。

Optical flow method has the advantages of high sensitivity, high precision, and includes the time factor, which is suitable for dynamic measurement. Therefore, the optical flow method has become a research hotspot since it was proposed. But it is mostly used in motion analysis now. There are few studies on deformation measurement by using optical flow, and the research on surface shape measurement is still blank. Although shape measurement and deformation measurement belong to different fields, they have a common characteristic that is fringes. From the viewpoint of optical flow, the change of fringes corresponds to an optical flow field. This project intends to use the optical flow formed by projection fringe or interference fringe to measure the shape and deformation. By exploring the theoretical relationship between the optical flow and the spatial motion of the measured points, we establish a theoretical model. When the theoretical model is applied to the deformation measurement, the theoretical relationship between optical flow and 3D deformation will be revealed. When the theoretical model is applied to the measurement of surface shape, the theoretical relationship between optical flow and the height distribution or phase distribution is clarified. Some complex experimental factors such as non-parallel noise projection fringes, non-uniform reflection reference surface or object surface will be discussed, and the countermeasures will be proposed. Through numerical simulation and experimental verification, the experimental technical characteristics of optical flow are revealed, and the measurement range, sensitivity, accuracy and other important parameters of optical flow method in the measurement are clarified. Then a new technique based on optical flow is established for shape and deformation dynamic measurement.