Real-time 'Actor-Critic' Tracking

ECCV 2018  ·  Boyu Chen, Dong Wang, Peixia Li, Shuang Wang, Huchuan Lu ·

In this work, we propose a novel tracking algorithm with real-time performance based on the ‘Actor-Critic’ framework. This framework consists of two major components: ‘Actor’ and ‘Critic’. The ‘Actor’ model aims to infer the optimal choice in a continuous action space, which directly makes the tracker move the bounding box to the object location in the current frame. For offline training,the‘Critic’modelisintroducedtoforma‘Actor-Critic’frameworkwith reinforcement learning and outputs a Q-value to guide the learning process of both ‘Actor’ and ‘Critic’ deep networks. Then, we modify the original deep deterministic policy gradient algorithm to effectively train our ‘Actor-Critic’ model for the tracking task. For online tracking, the ‘Actor’ model provides a dynamic search strategy to locate the tracked object efficiently and the ‘Critic’ model acts as a verification module to make our tracker more robust. To the best of our knowledge, this work is the first attempt to exploit the continuous action and ‘Actor-Critic’ framework for visual tracking. Extensive experimental results on popular benchmarks demonstrate that the proposed tracker performs favorably against many state-of-the-art methods, with real-time performance.

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