A Two-Stage Dynamic Model for Visual Tracking

We propose a new dynamic model which can be used within blob trackers to track the target's center of gravity. A strong point of the model is that it is designed to track a variety of motions which are usually encountered in applications such as pedestrian tracking, hand tracking and sports. We call the dynamic model a two-stage dynamic model due to its particular structure, which is a composition of two models: a liberal model and a conservative model. The liberal model allows larger perturbations in the target's dynamics and is able to account for motions in between the random-walk dynamics and the nearly-constant-velocity dynamics. On the other hand, the conservative model assumes smaller perturbations and is used to further constrain the liberal model to the target's current dynamics. We implement the two-stage dynamic model in a twostage probabilistic tracker based on the particle filter and apply it to two separate examples of blob tracking: (i) tracking entire per...

• Type: Journal
• Year: 2010
• Where: TSMC
• Authors: Matej Kristan, Stanislav Kovacic, Ales Leonardis, Janez Pers
• Keywords: Artificial Intelligence, Dynamic Model, Model, TSMC 2010, Two-stage Dynamic Model