A Transformer-based visual object tracker via learning immediate appearance change
Yifan Li, Xiaotao Liu, Dian Yuan, Jiaoying Wang, Peng Wu, Jing Liu
Abstract
Transformer has shown its great strength in visual object tracking due to its effective attention mechanism , but most prevailing transformer-based trackers only explore temporal information frame by frame, thus overlooking the rich context information inherent in videos. To alleviate this problem, we propose a transformer-based tracker via learning immediate appearance change information in videos, called IAC-tracker. The proposed tracker enhances the perception of the immediate motion state to improve the performance of single target tracking . IAC-tracker contains three key components: a spatial information extractor (SIE) with a superior attention mechanism to progressively extract spatial information, a temporal information extractor (TIE) with a designed temporal attention mechanism to progressively learn target immediate appearance change, and a novel spatial–temporal context enhanced fusion module integrating the information from SIE and TIE to prepare for the final prediction head. Comparison experiments with state-of-the-art trackers on six challenging datasets demonstrate the superior performance of IAC-tracker with real-time running speed.