基于关键原子动作的视频事件学习与识别方法  

Learning and Recognition of Video Events Based on Key Atomic Actions

作　　者：赵猛[1] 曹茂永[1] 赵增顺[1] 刘小峰[2] 

机构地区：[1]山东科技大学信息与电气工程学院,山东青岛266590 [2]河海大学计算机与信息学院,江苏常州213022

出　　处：《北京理工大学学报》2013年第3期290-295,共6页Transactions of Beijing Institute of Technology

基　　金：国家自然科学基金资助项目(60805028);中央高校基础研究资助项目(2011B11114;2012B07314);山东科技大学科研创新团队支持计划项目(2010KYTD101);山东省自然科学基金资助项目(ZR2010FM027);中国博士后科学基金资助项目(2012M521336)

摘　　要：提出了一种基于关键原子动作的视频事件学习与识别方法.通过与或图来表示事件、子事件、原子动作之间的层次结构,以及子事件和原子动作间的时序关系,通过最小描述长度准则从训练数据中学习事件的与或图结构.在此基础上,提出了一种事件中关键原子动作的学习方法,根据原子动作的重要性赋予相应的权值,该权值可以用于事件的实时解析,提高事件的识别率.基于原子动作的权值及漏检数目定义了事件的可识别度,用于减少待识别的事件数目,进而提高事件识别的算法效率.多种场景实验结果表明所提出的方法可以有效地进行事件识别.In this paper, a method for video events learning and recognition based-on key atomic actions is presented. First, the hierarchical structures of events and the temporal relations between sub-events and atomic actions are expressed by and-or graph, which is learned from training data by the minimum description length principle. Then, the weights of the atomic actions are computed according to their importance, and the atomic action with the maximum weight is regarded as the key atomic action. The weight values of the atomic actions could be used for real-time events parsing which leads to the improvement of event recognition ratio. We also define the event recognition degree based on the weight of atomic action to reduce the number of identified events and raise the efficiency of events recognition algorithm. Finally, the experimental results show that, in a variety of scenes, the proposed method is effective for event recognition.

关 键 词：与或图 事件规则学习 事件识别 事件解析 时序关系 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]