标题：Recognizing Human Actions in Low-Resolution Videos: An Approach Based on the Dempster-Shafer Theory
作者：Gao, Zhen; Lu, Guoliang; Yan, Peng
作者机构：[Gao, Zhen; Lu, Guoliang; Yan, Peng] Shandong Univ, Sch Mech Engn, Natl Demonstrat Ctr Expt Mech Engn Educ, Key Lab High Efficiency & Clean Mech Manuf 更多
通讯作者：Lu, Guoliang;Lu, GL
通讯作者地址：[Lu, GL]Shandong Univ, Sch Mech Engn, Natl Demonstrat Ctr Expt Mech Engn Educ, Key Lab High Efficiency & Clean Mech Manufacture, Jinan, Shandong, Peop 更多
来源：INTERNATIONAL JOURNAL OF PATTERN RECOGNITION AND ARTIFICIAL INTELLIGENCE
关键词：Action recognition; low-resolution videos; Dempster-Shafer theory
摘要：To address the problem that many existing approaches are not appropriate for action recognition in low-resolution (LR) videos, this paper presents a framework based on the Dempster-Shafer (DS) theory for this purpose. In the framework, artificial neural networks (ANNs) are firstly trained for every class with training samples, and then basic belief assignments (BBAs) for underlying classes are computed with the trained ANNs. The resulted BBAs are fused from all frames in the whole video sequentially by frame-by-frame based on DS's rule of fusion. Action recognition is last performed with a threshold-based decision making. We conducted experiments on extensive testing data with various levels of video resolution. Results reveal that the proposed framework: (1) shows outperforming recognition performances compared with state-of-the-art classifications, respectively, such as sequence matching, voting-based strategy and bag-of-words (BoW) method; and (2) can achieve a low observational latency in recognition.