ARTrackV2: Prompting Autoregressive Tracker Where to Look and How to Describe
Authors: Yifan Bai, Zeyang Zhao, Yihong Gong, Xing Wei

We present ARTrackV2 which integrates two pivotal aspects of tracking: determining where to look (localization) and how to describe (appearance analysis) the target object across video frames. Building on the foundation of its predecessor ARTrackV2 extends the concept by introducing a unified generative framework to "read out" object's trajectory and "retell" its appearance in an autoregressive manner. This approach fosters a time-continuous methodology that models the joint evolution of motion and visual features guided by previous estimates. Furthermore ARTrackV2 stands out for its efficiency and simplicity obviating the less efficient intra-frame autoregression and hand-tuned parameters for appearance updates. Despite its simplicity ARTrackV2 achieves state-of-the-art performance on prevailing benchmark datasets while demonstrating a remarkable efficiency improvement. In particular ARTrackV2 achieves an AO score of 79. 5% on GOT-10k and an AUC of 86. 1% on TrackingNet while being 3.6 xfaster than ARTrack.