A confabulation model for abnormal vehicle events detection in wide-area traffic monitoring

The advanced sensing and imaging technologies of today's digital camera systems provide the capability of monitoring traffic flows in a very large area. In order to provide continuous monitoring and prompt anomaly detection, an abstract-level autonomous anomaly detection model is developed that is able to detect various categories of abnormal vehicle events with unsupervised learning. The method is based on the cogent confabulation model, which performs statistical inference functions in a neuromorphic formulation. The proposed approach covers the partitioning of a large region, training of the vehicle behavior knowledge base and the detection of anomalies according to the likelihood-ratio test. A software version of the system is implemented to verify the proposed model. The experimental results demonstrate the functionality of the detection model and compare the system performance under different configurations.