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VAN: Versatile Affinity Network for End-to-End Online Multi-object Tracking

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Computer Vision – ACCV 2020 (ACCV 2020)

Abstract

In recent years, tracking-by-detection has become the most popular multi-object tracking (MOT) method, and deep convolutional neural networks (CNNs)-based appearance features have been successfully applied to enhance the performance of candidate association. Several MOT methods adopt single-object tracking (SOT) and handcrafted rules to deal with incomplete detection, resulting in numerous false positives (FPs) and false negatives (FNs). However, a separately trained SOT network is not directly adaptable because domains can differ, and handcrafted rules contain a considerable number of hyperparameters, thus making it difficult to optimize the MOT method. To address this issue, we propose a versatile affinity network (VAN) that can perform the entire MOT process in a single network including target specific SOT to handle incomplete detection issues, affinity computation between target and candidates, and decision of tracking termination. We train the VAN in an end-to-end manner by using event-aware learning that is designed to reduce the potential error caused by FNs, FPs, and identity switching. The proposed VAN significantly reduces the number of hyperparameters and handcrafted rules required for the MOT framework and successfully improves the MOT performance. We implement the VAN using two baselines with different candidate refinement methods to demonstrate the effects of the proposed VAN. We also conduct extensive experiments including ablation studies on three public benchmark datasets: 2D MOT2015, MOT2016, and MOT2017. The results indicate that the proposed method successfully improves the object tracking performance compared with that of baseline methods, and outperforms recent state-of-the-art MOT methods in terms of several tracking metrics including MOT accuracy (MOTA), identity F1 score (IDF1), percentage of mostly tracked targets (MT), and FP.

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Notes

  1. 1.

    https://motchallenge.net.

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Acknowledgement

This work was supported by Institute of Information & communications Technology Planning & Evaluation(IITP) grant funded by the Korea government(MSIT) (No. 2014-0-00059, Development of Predictive Visual Intelligence Technology), (No. 2017-0-00897, Development of Object Detection and Recognition for Intelligent Vehicles) and (No. 2018-0-01290, Development of an Open Dataset and Cognitive Processing Technology for the Recognition of Features Derived From Unstructured Human Motions Used in Self-driving Cars).

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Lee, H., Kim, I., Kim, D. (2021). VAN: Versatile Affinity Network for End-to-End Online Multi-object Tracking. In: Ishikawa, H., Liu, CL., Pajdla, T., Shi, J. (eds) Computer Vision – ACCV 2020. ACCV 2020. Lecture Notes in Computer Science(), vol 12623. Springer, Cham. https://doi.org/10.1007/978-3-030-69532-3_35

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