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Paper · 2105.09701 · 2021

An Empirical Study of Vehicle Re-Identification on the AI City Challenge

arXiv · PDF · Open in the Atlas

Code that ran

We lifted 6 functions out of this paper's own repositories and ran 2 of them in a sandbox. "Ran" means the function executed on a synthesized input and returned a value. It is not a reproduction of the paper's results.

RepositoryRoleRan
michuanhaohao/AICITY2021_Track2_DMT canonical 2 of 6
FunctionStatusWhere it lives
copy_state_dict Ran michuanhaohao/AICITY2021_Track2_DMT/train_stage2_v1.py
code served (permissive licence) · get_code("fcfe83b90ec34b09")
normalize Ran michuanhaohao/AICITY2021_Track2_DMT/loss/triplet_loss.py
code served (permissive licence) · get_code("e3b2a83f52101f2d")
cosine_dist Not yet run michuanhaohao/AICITY2021_Track2_DMT/loss/triplet_loss.py
code served (permissive licence) · get_code("71b4e1d375d8fd78")
euclidean_dist Not yet run michuanhaohao/AICITY2021_Track2_DMT/loss/triplet_loss.py
code served (permissive licence) · get_code("5315f75bf5367f0a")
extract_features Not yet run michuanhaohao/AICITY2021_Track2_DMT/train_stage2_v1.py
code served (permissive licence) · get_code("f419ea700861ea83")
make_loss Not yet run michuanhaohao/AICITY2021_Track2_DMT/loss/make_loss.py
code served (permissive licence) · get_code("4b889f410e8c0400")

Repositories linked to this paper

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Abstract

This paper introduces our solution for the Track2 in AI City Challenge 2021 (AICITY21). The Track2 is a vehicle re-identification (ReID) task with both the real-world data and synthetic data. We mainly focus on four points, i.e. training data, unsupervised domain-adaptive (UDA) training, post-processing, model ensembling in this challenge. (1) Both cropping training data and using synthetic data can help the model learn more discriminative features. (2) Since there is a new scenario in the test set that dose not appear in the training set, UDA methods perform well in the challenge. (3) Post-processing techniques including re-ranking, image-to-track retrieval, inter-camera fusion, etc, significantly improve final performance. (4) We ensemble CNN-based models and transformer-based models which provide different representation diversity. With aforementioned techniques, our method finally achieves 0.7445 mAP score, yielding the first place in the competition. Codes are available at https://github.com/michuanhaohao/AICITY2021_Track2_DMT.

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