Modular Interactive Video Object Segmentation: Interaction-to-Mask, Propagation and Difference-Aware Fusion (MiVOS)
Ho Kei Cheng, Yu-Wing Tai, Chi-Keung Tang
CVPR 2021
[arXiv] [Paper PDF] [Project Page] [Demo] [Papers with Code]
Credit (left to right): DAVIS 2017, Academy of Historical Fencing, Modern History TV
We manage the project using three different repositories (which are actually in the paper title). This is the main repo, see also Mask-Propagation and Scribble-to-Mask.
Overall structure and capabilities
| MiVOS | Mask-Propagation | Scribble-to-Mask | |
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| DAVIS/YouTube semi-supervised evaluation |
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| DAVIS interactive evaluation |
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| User interaction GUI tool |
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| Dense Correspondences |
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| Train propagation module |
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| Train S2M (interaction) module |
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| Train fusion module |
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| Generate more synthetic data |
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Framework
Requirements
We used these packages/versions in the development of this project. It is likely that higher versions of the same package will also work. This is not an exhaustive list -- other common python packages (e.g. pillow) are expected and not listed.
- PyTorch
1.7.1 - torchvision
0.8.2 - OpenCV
4.2.0 - Cython
- progressbar
- davis-interactive (https://github.com/albertomontesg/davis-interactive)
- PyQt5 for GUI
- networkx
2.4for DAVIS - gitpython for training
- gdown for downloading pretrained models
Refer to the official PyTorch guide for installing PyTorch/torchvision. The rest can be installed by:
pip install PyQt5 davisinteractive progressbar2 opencv-python networkx gitpython gdown Cython
Quick start
python download_model.pyto get all the required models.python interactive_gui.py --videoorpython interactive_gui.py --images. A video has been prepared for you atexamples/example.mp4.- If you need to label more than one object, additionally specify
--num_objects - There are instructions in the GUI. You can also watch the demo videos for some ideas.
Main Results
DAVIS/YouTube semi-supervised results
DAVIS Interactive Track
All results are generated using the unmodified official DAVIS interactive bot without saving masks (--save_mask not specified) and with an RTX 2080Ti. We follow the official protocol.
Precomputed result, with the json summary: [Google Drive] [OneDrive]
eval_interactive_davis.py
| Model | AUC-J&F | J&F @ 60s |
|---|---|---|
| Baseline | 86.0 | 86.6 |
| (+) Top-k | 87.2 | 87.8 |
| (+) BL30K pretraining | 87.4 | 88.0 |
| (+) Learnable fusion | 87.6 | 88.2 |
| (+) Difference-aware fusion (full model) | 87.9 | 88.5 |
Pretrained models
python download_model.py should get you all the models that you need. (pip install gdown required.)
Training
Data preparation
Datasets should be arranged as the following layout. You can use download_datasets.py (same as the one Mask-Propagation) to get the DAVIS dataset and manually download and extract fusion_data ([OneDrive]) and BL30K.
├── BL30K
├── DAVIS
│ └── 2017
│ ├── test-dev
│ │ ├── Annotations
│ │ └── ...
│ └── trainval
│ ├── Annotations
│ └── ...
├── fusion_data
└── MiVOS
BL30K
BL30K is a synthetic dataset rendered using Blender with ShapeNet's data. We break the dataset into six segments, each with approximately 5K videos. The videos are organized in a similar format as DAVIS and YouTubeVOS, so dataloaders for those datasets can be used directly. Each video is 160 frames long, and each frame has a resolution of 768*512. There are 3-5 objects per video, and each object has a random smooth trajectory -- we tried to optimize the trajectories greedily to minimize object intersection (not guaranteed), with occlusions still possible (happen a lot in reality). See generation/blender/generate_yaml.py for details.
We noted that using probably half of the data is sufficient to reach full performance (although we still used all), but using less than one-sixth (5K) is insufficient.
Download
You can either use the automatic script download_bl30k.py or download it manually below. Note that each segment is about 115GB in size -- 700GB in total. You are going to need ~1TB of free disk space to run the script (including extraction buffer).
Google Drive is much faster in my experience. Your mileage might vary.
Manual download: [Google Drive] [OneDrive]
Generation
- Download ShapeNet.
- Install Blender. (We used 2.82)
- Download a bunch of background and texture images. We used this repo (we specified "non-commercial reuse" in the script) and the list of keywords are provided in generation/blender/*.json.
- Generate a list of configuration files (generation/blender/generate_yaml.py).
- Run rendering on the configurations. See here (Not documented in detail, ask if you have a question)
Fusion data
We use the propagation module to run through some data and obtain real outputs to train the fusion module. See the script generate_fusion.py.
Or you can download pre-generated fusion data:
Training commands
These commands are to train the fusion module only.
CUDA_VISIBLE_DEVICES=[a,b] OMP_NUM_THREADS=4 python -m torch.distributed.launch --master_port [cccc] --nproc_per_node=2 train.py --id [defg] --stage [h]
We implemented training with Distributed Data Parallel (DDP) with two 11GB GPUs. Replace a, b with the GPU ids, cccc with an unused port number, defg with a unique experiment identifier, and h with the training stage (0/1).
The model is trained progressively with different stages (0: BL30K; 1: DAVIS). After each stage finishes, we start the next stage by loading the trained weight. A pretrained propagation model is required to train the fusion module.
One concrete example is:
Pre-training on the BL30K dataset: CUDA_VISIBLE_DEVICES=0,1 OMP_NUM_THREADS=4 python -m torch.distributed.launch --master_port 7550 --nproc_per_node=2 train.py --load_prop saves/propagation_model.pth --stage 0 --id retrain_s0
Main training: CUDA_VISIBLE_DEVICES=0,1 OMP_NUM_THREADS=4 python -m torch.distributed.launch --master_port 7550 --nproc_per_node=2 train.py --load_prop saves/propagation_model.pth --stage 1 --id retrain_s012 --load_network [path_to_trained_s0.pth]
Credit
f-BRS: https://github.com/saic-vul/fbrs_interactive_segmentation
ivs-demo: https://github.com/seoungwugoh/ivs-demo
deeplab: https://github.com/VainF/DeepLabV3Plus-Pytorch
STM: https://github.com/seoungwugoh/STM
BlenderProc: https://github.com/DLR-RM/BlenderProc
Citation
Please cite our paper if you find this repo useful!
@inproceedings{MiVOS_2021,
title={Modular Interactive Video Object Segmentation: Interaction-to-Mask, Propagation and Difference-Aware Fusion},
author={Cheng, Ho Kei and Tai, Yu-Wing and Tang, Chi-Keung},
booktitle={CVPR},
year={2021}
}
Contact: [email protected]
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