Unified-EPT

Code for the ICCV 2021 Workshop paper: A Unified Efficient Pyramid Transformer for Semantic Segmentation.

Installation

• Linux, CUDA>=10.0, GCC>=5.4
• Python>=3.7
• Create a conda environment:

    conda create -n unept python=3.7 pip

Then, activate the environment:

    conda activate unept

• PyTorch>=1.5.1, torchvision>=0.6.1 (following instructions here)

For example:

conda install pytorch==1.5.1 torchvision==0.6.1 cudatoolkit=10.2 -c pytorch

• Install MMCV, MMSegmentation, timm

pip install -r requirements.txt

• Install Deformable DETR and compile the CUDA operators (the instructions can be found here).

Data Preparation

Please following the code from openseg to generate ground truth for boundary refinement.

The data format should be like this.

ADE20k

You can download the processed dt_offset file here.

path/to/ADEChallengeData2016/
  images/
    training/
    validation/
  annotations/ 
    training/
    validation/
  dt_offset/
    training/
    validation/

PASCAL-Context

You can download the processed dataset here.

path/to/PASCAL-Context/
  train/
    image/
    label/
    dt_offset/
  val/
    image/
    label/
    dt_offset/

Usage

Training

The default is for multi-gpu, DistributedDataParallel training.

python -m torch.distributed.launch --nproc_per_node=8 \ # specify gpu number
--master_port=29500  \
train.py  --launcher pytorch \
--config /path/to/config_file 

• specify the data_root in the config file;
• log dir will be created in ./work_dirs;
• download the DeiT pretrained model and specify the pretrained path in the config file.

Evaluation

# single-gpu testing
python test.py --checkpoint /path/to/checkpoint \
--config /path/to/config_file \
--eval mIoU \
[--out ${RESULT_FILE}] [--show] \
--aug-test \ # for multi-scale flip aug

# multi-gpu testing (4 gpus, 1 sample per gpu)
python -m torch.distributed.launch --nproc_per_node=4 --master_port=29500 \
test.py  --launcher pytorch --eval mIoU \
--config_file /path/to/config_file \
--checkpoint /path/to/checkpoint \
--aug-test \ # for multi-scale flip aug

Results

We report results on validation sets.

Backbone	Crop Size	Batch Size	Dataset	Lr schd	Mem(GB)	mIoU(ms+flip)	config
Res-50	480x480	16	ADE20K	160K	7.0G	46.1	config
DeiT	480x480	16	ADE20K	160K	8.5G	50.5	config
DeiT	480x480	16	PASCAL-Context	160K	8.5G	55.2	config

Security

See CONTRIBUTING for more information.

License

This project is licensed under the Apache-2.0 License.

Citation

If you use this code and models for your research, please consider citing:

@article{zhu2021unified,
  title={A Unified Efficient Pyramid Transformer for Semantic Segmentation},
  author={Zhu, Fangrui and Zhu, Yi and Zhang, Li and Wu, Chongruo and Fu, Yanwei and Li, Mu},
  journal={arXiv preprint arXiv:2107.14209},
  year={2021}
}

Acknowledgment

We thank the authors and contributors of MMCV, MMSegmentation, timm and Deformable DETR.