Target–distractor memory joint tracking algorithm via Credit Allocation Network

The tracking framework based on the memory network has gained significant attention due to its enhanced adaptability to variations in target appearance. However, the performance of the framework is limited by the negative effects of distractors in the background. Hence, this paper proposes a method for tracking using Credit Allocation Network to join target and distractor memory. Specifically, we design a Credit Allocation Network (CAN) that is updated online via Guided Focus Loss. The CAN produces credit scores for tracking results by learning features of the target object, ensuring the update of reliable samples for storage in the memory pool. Furthermore, we construct a multi-domain memory model that simultaneously captures target and background information from multiple historical intervals, which can build a more compatible object appearance model while increasing the diversity of the memory sample. Moreover, a novel target–distractor joint localization strategy is presented, which read target and distractor information from memory frames based on cross-attention, so as to cancel out wrong responses in the target response map by using the distractor response map. The experimental results on OTB-2015, GOT-10k, UAV123, LaSOT, and VOT-2018 datasets show the competitiveness and effectiveness of the proposed method compared to other trackers.