A Deep-structured Conditional Random Field Model for Object Silhouette Tracking
This work addresses the problem of robust object tracking in video surveillance for applications requiring accurate silhouette estimation, though it appears incremental as it builds on existing probabilistic graphical models.
The paper tackles object silhouette tracking by introducing a deep-structured conditional random field (DS-CRF) model that incorporates spatial and temporal context dynamically, achieving strong performance in scenarios like occlusion and multiple targets compared to baseline and state-of-the-art methods.
In this work, we introduce a deep-structured conditional random field (DS-CRF) model for the purpose of state-based object silhouette tracking. The proposed DS-CRF model consists of a series of state layers, where each state layer spatially characterizes the object silhouette at a particular point in time. The interactions between adjacent state layers are established by inter-layer connectivity dynamically determined based on inter-frame optical flow. By incorporate both spatial and temporal context in a dynamic fashion within such a deep-structured probabilistic graphical model, the proposed DS-CRF model allows us to develop a framework that can accurately and efficiently track object silhouettes that can change greatly over time, as well as under different situations such as occlusion and multiple targets within the scene. Experiment results using video surveillance datasets containing different scenarios such as occlusion and multiple targets showed that the proposed DS-CRF approach provides strong object silhouette tracking performance when compared to baseline methods such as mean-shift tracking, as well as state-of-the-art methods such as context tracking and boosted particle filtering.