小位移光流计算的中值公式  

Median formula for optic flow computation of small displacement

作　　者：魏伟波[1] 潘振宽[1] 李媛媛[1] 于晶晶[1] 张楠[1] 

机构地区：[1]青岛大学信息工程学院,青岛266071

出　　处：《仪器仪表学报》2011年第10期2256-2260,共5页Chinese Journal of Scientific Instrument

基　　金：山东省自然科学基金(Y2008G17)资助项目

摘　　要：光流场反映了图像上每一点灰度的变化趋势,其计算的可靠性和效率已成为运动跟踪领域研究的热点问题。变分方法是用来实现光流计算的主流方法之一,但其计算效率较低。利用对偶方法虽然克服了变分方法中引入小规则参数的问题,计算速度有所提高,但并未有实质性改进。引入了中值公式计算光流,避免了复杂的迭代计算过程,提高了计算效率。首先简单介绍了光流计算模型中数据项和光滑项的不同模型假设,然后利用中值公式计算小位移光流场。通过实验对对偶方法和中值公式的实验时间进行比较,验证了中值公式的有效性和效率。Optic flow field reflects the changing trend of image,its computation reliability and efficiency have been the hot spot in motion tracking fields.Variational method is one of the mainstream methods for computing optic flow,but its efficiency is very slow.Dual method overcomes the difficulty that introduces small parameter in variational method,and increases the computation speed;however no substantial improvement is achieved.In this paper,median formula is introduced to compute optic flow,which could avoid complex iterative computation process and increase efficiency.Firstly,different model hypotheses of the data term and smooth term in optic flow computation model are described.Then,median formula is studied and used to compute optic flow of small displacement.Finally,a comparison between median formula method and dual method is carried out in experiment,and experiment results verify the validity and efficiency of the median formula.

关 键 词：小位移 光流计算 变分方法 中值公式 对偶方法 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]