This project hosts the code for implementing the FreeSOLO algorithm for unsupervised instance segmentation.

FreeSOLO: Learning to Segment Objects without Annotations,
Xinlong Wang, Zhiding Yu, Shalini De Mello, Jan Kautz, Anima Anandkumar, Chunhua Shen, Jose M. Alvarez
In: Proc. IEEE Conf. Computer Vision and Pattern Recognition (CVPR), 2022
arXiv preprint (arXiv 2202.12181)

• Linux or macOS with Python >= 3.6
• PyTorch >= 1.5 and torchvision that matches the PyTorch installation.
• scikit-image

# create conda env
conda create -n detectron2 python=3.6
# activate the enviorment
conda activate detectron2
# install PyTorch >=1.5 with GPU
conda install pytorch torchvision -c pytorch

Follow the INSTALL.md to install Detectron2 (commit id 11528ce has been tested).

Follow the datasets/README.md to set up the MS COCO dataset.

Download the DenseCL pre-trained model from here. Convert it to detectron2's format and put the converted model under "training_dir/pre-trained/DenseCL" directory.

python tools/convert-pretrain-to-detectron2.py {WEIGHT_FILE}.pth {WEIGHT_FILE}.pkl

Download the prepared free masks in json format from here. Put it under "datasets/coco/annotations" directory. Or, generate it by yourself:

bash inference_freemask.sh

# train with free masks
bash train.sh

# generate pseudo labels
bash gen_pseudo_labels.sh

# self-train
bash train_pl.sh

Download the trained model from here.

bash test.sh {MODEL_PATH}

Please consider citing our paper in your publications if the project helps your research. BibTeX reference is as follow.

@article{wang2022freesolo,
  title={{FreeSOLO}: Learning to Segment Objects without Annotations},
  author={Wang, Xinlong and Yu, Zhiding and De Mello, Shalini and Kautz, Jan and Anandkumar, Anima and Shen, Chunhua and Alvarez, Jose M},
  journal={arXiv preprint arXiv:2202.12181},
  year={2022}
}