A simple baseline for one-shot multi-object tracking:
FairMOT: On the Fairness of Detection and Re-Identification in Multiple Object Tracking,
Yifu Zhang, Chunyu Wang, Xinggang Wang, Wenjun Zeng, Wenyu Liu,
arXiv technical report (arXiv 2004.01888)
There has been remarkable progress on object detection and re-identification in recent years which are the core components for multi-object tracking. However, little attention has been focused on accomplishing the two tasks in a single network to improve the inference speed. The initial attempts along this path ended up with degraded results mainly because the re-identification branch is not appropriately learned. In this work, we study the essential reasons behind the failure, and accordingly present a simple baseline to addresses the problems. It remarkably outperforms the state-of-the-arts on the MOT challenge datasets at 30 FPS. We hope this baseline could inspire and help evaluate new ideas in this field.
Dataset | MOTA | IDF1 | IDS | MT | ML | FPS |
---|---|---|---|---|---|---|
2DMOT15 | 60.6 | 64.7 | 591 | 47.6% | 11.0% | 30.5 |
MOT16 | 74.9 | 72.8 | 1074 | 44.7% | 15.9% | 25.9 |
MOT17 | 73.7 | 72.3 | 3303 | 43.2% | 17.3% | 25.9 |
MOT20 | 61.8 | 67.3 | 5243 | 68.8% | 7.6% | 13.2 |
All of the results are obtained on the MOT challenge evaluation server under the “private detector” protocol. We rank first among all the trackers on 2DMOT15, MOT16, MOT17 and MOT20. The tracking speed of the entire system can reach up to 30 FPS.
conda create -n FairMOT
conda activate FairMOT
conda install pytorch==1.2.0 torchvision==0.4.0 cudatoolkit=10.0 -c pytorch
cd ${FAIRMOT_ROOT}
pip install -r requirements.txt
git clone https://github.com/CharlesShang/DCNv2
cd DCNv2
./make.sh
crowdhuman
|——————images
| └——————train
| └——————val
└——————labels_with_ids
| └——————train(empty)
| └——————val(empty)
└------annotation_train.odgt
└------annotation_val.odgt
Then, you can change the paths in src/gen_labels_crowd.py and run:
cd src
python gen_labels_crowd.py
MOT15
|——————images
| └——————train
| └——————test
└——————labels_with_ids
└——————train(empty)
MOT20
|——————images
| └——————train
| └——————test
└——————labels_with_ids
└——————train(empty)
Then, you can change the seq_root and label_root in src/gen_labels_15.py and src/gen_labels_20.py and run:
cd src
python gen_labels_15.py
python gen_labels_20.py
to generate the labels of 2DMOT15 and MOT20. The seqinfo.ini files of 2DMOT15 can be downloaded here [Google], [Baidu],code:8o0w.
DLA-34 COCO pretrained model: DLA-34 official. HRNetV2 ImageNet pretrained model: HRNetV2-W18 official, HRNetV2-W32 official. After downloading, you should put the pretrained models in the following structure:
${FAIRMOT_ROOT}
└——————models
└——————ctdet_coco_dla_2x.pth
└——————hrnetv2_w32_imagenet_pretrained.pth
└——————hrnetv2_w18_imagenet_pretrained.pth
Our baseline FairMOT model (DLA-34 backbone) is pretrained on the CrowdHuman for 60 epochs with the self-supervised learning approach and then trained on the MIX dataset for 30 epochs. The models can be downloaded here: crowdhuman_dla34.pth [Google] [Baidu, code:ggzx ] [Onedrive]. fairmot_dla34.pth [Google] [Baidu, code:uouv] [Onedrive]. (This is the model we get 73.7 MOTA on the MOT17 test set. ) After downloading, you should put the baseline model in the following structure:
${FAIRMOT_ROOT}
└——————models
└——————fairmot_dla34.pth
└——————...
sh experiments/crowdhuman_dla34.sh
sh experiments/mix_ft_ch_dla34.sh
sh experiments/mix_dla34.sh
sh experiments/mot17_dla34.sh
sh experiments/mot15_ft_mix_dla34.sh
sh experiments/mot20_ft_mix_dla34.sh
sh experiments/mix_mot17_half_dla34.sh
sh experiments/mix_mot17_half_hrnet18.sh
sh experiments/mix_mot17_half_res34.sh
sh experiments/mix_mot17_half_res34fpn.sh
sh experiments/mix_mot17_half_res50.sh
The ablation study model 'mix_mot17_half_dla34.pth' can be downloaded here: [Google] [Onedrive] [Baidu, code:iifa].
Training Data | MOTA | IDF1 | IDS |
---|---|---|---|
MOT17 | 69.8 | 69.9 | 3996 |
MIX | 72.9 | 73.2 | 3345 |
CrowdHuman + MIX | 73.7 | 72.3 | 3303 |
cd src
python track.py mot --load_model ../models/fairmot_dla34.pth --conf_thres 0.6
to see the tracking results (76.5 MOTA and 79.3 IDF1 using the baseline model). You can also set save_images=True in src/track.py to save the visualization results of each frame.
cd src
python track_half.py mot --load_model ../exp/mot/mix_mot17_half_dla34.pth --conf_thres 0.4 --val_mot17 True
If you use our pretrained model 'mix_mot17_half_dla34.pth', you can get 69.1 MOTA and 72.8 IDF1.
cd src
python track.py mot --test_mot17 True --load_model ../models/fairmot_dla34.pth --conf_thres 0.4
python track.py mot --test_mot16 True --load_model ../models/fairmot_dla34.pth --conf_thres 0.4
and send the txt files to the MOT challenge evaluation server to get the results. (You can get the SOTA results 73+ MOTA on MOT17 test set using the baseline model 'fairmot_dla34.pth'.)
cd src
python track.py mot --test_mot15 True --load_model your_mot15_model.pth --conf_thres 0.3
python track.py mot --test_mot20 True --load_model your_mot20_model.pth --conf_thres 0.3
Results of the test set all need to be evaluated on the MOT challenge server. You can see the tracking results on the training set by setting --val_motxx True and run the tracking code. We set 'conf_thres' 0.4 for MOT16 and MOT17. We set 'conf_thres' 0.3 for 2DMOT15 and MOT20.
You can input a raw video and get the demo video by running src/demo.py and get the mp4 format of the demo video:
cd src
python demo.py mot --load_model ../models/fairmot_dla34.pth --conf_thres 0.4
You can change --input-video and --output-root to get the demos of your own videos. --conf_thres can be set from 0.3 to 0.7 depending on your own videos.
You can train FairMOT on custom dataset by following several steps bellow:
A large part of the code is borrowed from Zhongdao/Towards-Realtime-MOT and xingyizhou/CenterNet. Thanks for their wonderful works.
@article{zhang2020fair,
title={FairMOT: On the Fairness of Detection and Re-Identification in Multiple Object Tracking},
author={Zhang, Yifu and Wang, Chunyu and Wang, Xinggang and Zeng, Wenjun and Liu, Wenyu},
journal={arXiv preprint arXiv:2004.01888},
year={2020}
}
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