Table 2.

Recent surveys for anomalies in different context

Year	Existing work	Broad topics
2021	Khosro Rezaee et al. [101]	DL-based real-time crowd anomaly detection
2021	Rashmiranjan Nayak et al. [85]	DL-based methods for video anomaly detection
2020	Bharathkumar Ramachandra et al. [99]	A survey of single-scene video anomaly detection
2019	Gaurav Tripathi et al. [135]	CNN for crowd behavior
2019	Ahmed et al. [1]	Trajectory-based surveillance
2018	Shobha et al. [119]	Vehicle detection, Recognition and tracking
2016	Yuan et al. [159]	Moving object trajectory clustering
2016	Xiaoli Li et al. [68]	Anomaly detection techniques
2015	Li et al. [63]	Crowded scene analysis
2014	Tian et al. [133]	Vehicle surveillance
2013	Sivaraman et al. [123]	Vehicle detection, Tracking,
2012	Popoola et al. [96]	Abnormal human behavior recognition
2012	Angela A. Sodemann [124]	Human behavior detection