Event Stream-based Visual Object Tracking: A High-Resolution Benchmark Dataset and A Novel Baseline
Authors: Xiao Wang, Shiao Wang, Chuanming Tang, Lin Zhu, Bo Jiang, Yonghong Tian, Jin Tang

Tracking with bio-inspired event cameras has garnered increasing interest in recent years. Existing works either utilize aligned RGB and event data for accurate tracking or directly learn an event-based tracker. The former incurs higher inference costs while the latter may be susceptible to the impact of noisy events or sparse spatial resolution. In this paper we propose a novel hierarchical knowledge distillation framework that can fully utilize multi-modal / multi-view information during training to facilitate knowledge transfer enabling us to achieve high-speed and low-latency visual tracking during testing by using only event signals. Specifically a teacher Transformer-based multi-modal tracking framework is first trained by feeding the RGB frame and event stream simultaneously. Then we design a new hierarchical knowledge distillation strategy which includes pairwise similarity feature representation and response maps-based knowledge distillation to guide the learning of the student Transformer network. In particular since existing event-based tracking datasets are all low-resolution (346 * 260) we propose the first large-scale high-resolution (1280 * 720) dataset named EventVOT. It contains 1141 videos and covers a wide range of categories such as pedestrians vehicles UAVs ping pong etc. Extensive experiments on both low-resolution (FE240hz VisEvent COESOT) and our newly proposed high-resolution EventVOT dataset fully validated the effectiveness of our proposed method. The dataset evaluation toolkit and source code will be released.