Appearance features have been widely used in video anomaly detection even though they contain complex entangled factors. We propose a new method to model the normal patterns of human movements in surveillance video for anomaly detection using dynamic skeleton features. We decompose the skeletal movements into two sub-components: global body movement and local body posture. We model the dynamics and interaction of the coupled features in our novel Message-Passing Encoder-Decoder Recurrent Network. We observed that the decoupled features collaboratively interact in our spatio-temporal model to accurately identify human-related irregular events from surveillance video sequences. Compared to traditional appearance-based models, our method achieves superior outlier detection performance. Our model also offers "open-box" examination and decision explanation made possible by the semantically understandable features and a network architecture supporting interpretability.

提出了一种使用动态骨架特征建模监控视频中人类运动规律的新方法，该方法通过将骨架运动分解为全局身体运动和局部身体姿势两个子组件，并使用新型消息传递编码-解码循环网络来建模相互作用的耦合特征，以精确识别来自监控视频序列的人类相关的异常事件并提供可解释性。与传统的基于外观的模型相比，该方法实现了卓越的异常检测性能。

视频异常检测中的骨架轨迹规律学习