Recognition of suspicious behavior using case-based reasoning

XIA Li-min(夏利民), YANG Bao-juan(杨宝娟), TU Hong-bin(涂宏斌)

(School of Information Science and Engineering, Central South University, Changsha 410075, China)

Abstract:A novel method case-based reasoning was proposed for suspicious behavior recognition. The method is composed of three departs: human behavior decomposition, human behavior case representation and case-based reasoning. The new approach was proposed to decompose behavior into sub-behaviors that are easier to recognize using a saliency-based visual attention model. New representation of behavior was introduced, in which the sub-behavior and the associated time characteristic of sub-behavior were used to represent behavior case. In the process of case-based reasoning, apart from considering the similarity of basic sub-behaviors, order factor was proposed to measure the similarity of a time order among the sub-behaviors and span factor was used to measure the similarity of duration time of each sub-behavior, which makes the similarity calculations more rational and comprehensive. Experimental results show the effectiveness of the proposed method in comparison with other related works and can run in real-time for the recognition of suspicious behaviors.

Key words:visual attention mode; case-based reasoning; suspicious behavior; order factor; span factor