S$^3$Track: Self-supervised Tracking with Soft Assignment Flow

• URL: http://arxiv.org/abs/2305.09981v1
• Date: Wed, 17 May 2023 06:25:40 GMT
• Title: S$^3$Track: Self-supervised Tracking with Soft Assignment Flow
• Authors: Fatemeh Azimi and Fahim Mannan and Felix Heide
• Abstract summary: We study self-supervised multiple object tracking without using any video-level association labels. We propose differentiable soft object assignment for object association. We evaluate our proposed model on the KITTI, nuScenes, and Argoverse datasets.
• Score: 45.77333923477176
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: In this work, we study self-supervised multiple object tracking without using any video-level association labels. We propose to cast the problem of multiple object tracking as learning the frame-wise associations between detections in consecutive frames. To this end, we propose differentiable soft object assignment for object association, making it possible to learn features tailored to object association with differentiable end-to-end training. With this training approach in hand, we develop an appearance-based model for learning instance-aware object features used to construct a cost matrix based on the pairwise distances between the object features. We train our model using temporal and multi-view data, where we obtain association pseudo-labels using optical flow and disparity information. Unlike most self-supervised tracking methods that rely on pretext tasks for learning the feature correspondences, our method is directly optimized for cross-object association in complex scenarios. As such, the proposed method offers a reidentification-based MOT approach that is robust to training hyperparameters and does not suffer from local minima, which are a challenge in self-supervised methods. We evaluate our proposed model on the KITTI, Waymo, nuScenes, and Argoverse datasets, consistently improving over other unsupervised methods ($7.8\%$ improvement in association accuracy on nuScenes).

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