基于多尺度的光流算法在PIV中的应用

Application of Optical-flow Method Based on Multi-scales in PIV

提出一种基于多尺度分析的光流算法,此算法可以应用于PIV技术中。该方法针对数字图像建立整体光流模型,计算出全场象素点的速度矢量,可以修正原有的互相关算法计算所得结果中的错误矢量,能体现出互相关算法结果所体现不出的图像信息,对于PIV技术的发展有着重要的意义。文章介绍了光流模型的建立,并与传统互相关算法的结果进行了比较,验证了新方法得到的结果比原有算法所得到的结果有着明显的改进。

This paper presents an optical-flow method based on multi-scales used in PIV, by which, an optical-flow model based on digital images is set up and the speed vectors of the whole flow field is computed, modifying mistaken vectors gained through the original model named area-correlation, and incarnating some messages which can＇ t be incarnated by area-correlation. Thus, this method is of great significance for the development of PIV technique. Presenting the setting up of optical model and comparing it with original area-correlation method, this paper verifies that the result from the new method has obvious advancement comparing with the original method.