基于亮度和相位光流的结构振动测量对比  

Comparison of structural vibration measurement based on intensity-based and phase-based optical flow

作　　者：唐小洋 谢培悦 刘祚秋 汪利 焦柯 王建强 TANG Xiaoyang;XIE Peiyue;LIU Zuoqiu;WANG Li;JIAO Ke;WANG Jianqiang(School of Aeronautics and Astronautics,Sun Yat-sen University,Shenzhen 518107,China;Guangdong Architectural Design&Research Institute Company Limited,Guangzhou 510010,China;Guangdong Anping Technology Company Limited,Foshan 528248,China)

机构地区：[1]中山大学航空航天学院,广东深圳518107 [2]广东省建筑设计研究院有限公司,广东广州510010 [3]广东安评科技有限公司,广东佛山528248

出　　处：《中山大学学报(自然科学版)(中英文)》2025年第2期112-119,共8页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：广东省重点领域研发计划(2022B0101080001);国家自然科学基金(11972380)。

摘　　要：相位光流法首先通过小波滤波获得图像的局部相位信息,再通过相位梯度与相位变化估计结构位移,对光照变化和图像噪声都具有良好的鲁棒性,且在测量范围方面也较传统亮度光流法有一定提升。针对图像噪声、光照变化设计了多组模拟实验,在不同位移下对两种方法的测量误差进行了对比。结果表明,相位光流法在超过1个像素位移、有噪声和光照变化的情况下均有更好的测量效果。最后,用两种方法对模拟和实际的悬臂梁振动视频进行运动估计,验证了两种方法在结构微小振动估计中的有效性以及相位光流法的优越性。Phase-based optical flow method firstly obtains the local phase information of the image through wavelet filtering,and then estimates the displacement of structures with phase gradient and phase change.It has good robustness to illumination change and image noise,and has a certain improvement in the measurement range compared with the traditional intensity-based optical flow method.Several simulation experiments were designed for image noise and illumination change respectively.The measurement errors of the two methods were compared under different sizes of displacement.Those results show that the phase-based optical flow method has better measurement effect when there is more than 1 pixel displacement,noise and illumination change.Finally,two methods are used to estimate the motion of the simulated and actual cantilever beam vibration video,and the validity of the two methods and the superiority of phase-based optical flow method in the estimation of structural micro-vibration is verified.

关 键 词：图像位移估计 亮度光流 相位光流 微小位移 

分 类 号：O32[理学—一般力学与力学基础]