DynamicDet [[arXiv]](https://arxiv.org/abs/2304.05552)

This repo contains the official implementation of "DynamicDet: A Unified Dynamic Architecture for Object Detection".

Performance

MS COCO

Model	Easy / Hard	Size	FLOPs	FPS	APval	APtest
Dy-YOLOv7	90% / 10%	640	112.4G	110	51.4%	52.1%
	50% / 50%	640	143.2G	96	52.7%	53.3%
	10% / 90%	640	174.0G	85	53.3%	53.8%
	0% / 100%	640	181.7G	83	53.5%	53.9%
Dy-YOLOv7-X	90% / 10%	640	201.7G	98	53.0%	53.3%
	50% / 50%	640	248.9G	78	54.2%	54.4%
	10% / 90%	640	296.1G	65	54.7%	55.0%
	0% / 100%	640	307.9G	64	54.8%	55.0%
Dy-YOLOv7-W6	90% / 10%	1280	384.2G	74	54.9%	55.2%
	50% / 50%	1280	480.8G	58	55.9%	56.1%
	10% / 90%	1280	577.4G	48	56.4%	56.7%
	0% / 100%	1280	601.6G	46	56.5%	56.8%

Table Notes

• FPS is measured on the same machine with 1 NVIDIA V100 GPU, with batch_size = 1, no_trace and fp16.

• More results can be found on the paper.

Quick Start

Installation

cd DynamicDet
conda install pytorch=1.11 cudatoolkit=11.3 torchvision -c pytorch
pip install -r requirements.txt

Data preparation

Download MS COCO dataset images (train, val, test) and labels.

├── coco
│   ├── train2017.txt
│   ├── val2017.txt
│   ├── test-dev2017.txt
│   ├── images
│   │   ├── train2017
│   │   ├── val2017
│   │   ├── test2017
│   ├── labels
│   │   ├── train2017
│   │   ├── val2017
│   ├── annotations
│   │   ├── instances_val2017.json

Training

Step1: Training cascaded detector

• Single GPU training

  python train_step1.py --workers 8 --device 0 --batch-size 16 --epochs 300 --img 640 --cfg cfg/dy-yolov7-step1.yaml --weight '' --data data/coco.yaml --hyp hyp/hyp.scratch.p5.yaml --name dy-yolov7-step1
  

• Multiple GPU training (OURS, RECOMMENDED 🚀)

  python -m torch.distributed.launch --nproc_per_node 8 --master_port 9527 train_step1.py --workers 8 --device 0,1,2,3,4,5,6,7 --sync-bn --batch-size 128 --epochs 300 --img 640 --cfg cfg/dy-yolov7-step1.yaml --weight '' --data data/coco.yaml --hyp hyp/hyp.scratch.p5.yaml --name dy-yolov7-step1
  

Step2: Training adaptive router

python train_step2.py --workers 4 --device 0 --batch-size 1 --epochs 2 --img 640 --adam --cfg cfg/dy-yolov7-step2.yaml --weight runs/train/dy-yolov7-step1/weights/last.pt --data data/coco.yaml --hyp hyp/hyp.finetune.dynamic.adam.yaml --name dy-yolov7-step2

Getting the dynamic thresholds for variable-speed inference

python get_dynamic_thres.py --device 0 --batch-size 1 --img-size 640 --cfg cfg/dy-yolov7-step2.yaml --weight weights/dy-yolov7.pt --data data/coco.yaml --task val

Testing

python test.py --img-size 640 --batch-size 1 --conf 0.001 --iou 0.65 --device 0 --cfg cfg/dy-yolov7-step2.yaml --weight weights/dy-yolov7.pt --data data/coco.yaml --dy-thres <DY_THRESHOLD>

Inference

python detect.py --cfg cfg/dy-yolov7-step2.yaml --weight weights/dy-yolov7.pt --num-classes 80 --source <IMAGE/VIDEO> --device 0 --dy-thres <DY_THRESHOLD>

Citation

If you find this repo useful in your research, please consider citing the following paper:

@inproceedings{lin2023dynamicdet,
  title={DynamicDet: A Unified Dynamic Architecture for Object Detection},
  author={Lin, Zhihao and Wang, Yongtao and Zhang, Jinhe and Chu, Xiaojie},
  booktitle={Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR)},
  year={2023}
}

License

The project is only free for academic research purposes, but needs authorization for commerce. For commerce permission, please contact wyt@pku.edu.cn.