• TL;DR: CrossVIS (Crossover Learning for Fast Online Video Instance Segmentation) proposes a novel crossover learning paradigm to fully leverage rich contextual information across video frames, and obtains great trade-off between accuracy and speed for video instance segmentation.

Crossover Learning for Fast Online Video Instance Segmentation

Crossover Learning for Fast Online Video Instance Segmentation (ICCV 2021)

by Shusheng Yang*, Yuxin Fang*, Xinggang Wang†, Yu Li, Chen Fang, Ying Shan, Bin Feng, Wenyu Liu.

(*) equal contribution, (†) corresponding author.

ICCV2021 Paper

Main Results on YouTube-VIS 2019 Dataset

• We provide both checkpoints and codalab server submissions in the bellow link.

Name	AP	AP@50	AP@75	AR@1	AR@10	download
CrossVIS_R_50_1x	35.5	55.1	39.0	35.4	42.2	baidu(keycode: a0j0) | google
CrossVIS_R_101_1x	36.9	57.8	41.4	36.2	43.9	baidu(keycode: iwwo) | google

Getting Started

Installation

First, clone the repository locally:

git clone https://github.com/hustvl/CrossVIS.git

Then, create python virtual environment with conda:

conda create --name crossvis python=3.7.2
conda activate crossvis

Install torch 1.7.0 and torchvision 0.8.1:

pip install torch==1.7.0 torchvision==0.8.1

Follow the instructions to install detectron2. Please install detectron2 with commit id 9eb4831 if you have any issues related to detectron2.

Then install AdelaiDet by:

cd CrossVIS
python setup.py develop

Preparation

• Download YouTube-VIS 2019 dataset from here, the overall directory hierarchical structure is:

CrossVIS
├── datasets
│   ├── youtubevis
│   │   ├── train
│   │   │   ├── 003234408d
│   │   │   ├── ...
│   │   ├── val
│   │   │   ├── ...
│   │   ├── annotations
│   │   │   ├── train.json
│   │   │   ├── valid.json

• Download CondInst 1x pretrained model from here

Training

• Train CrossVIS R-50 with single GPU:

python tools/train_net.py --config configs/CrossVIS/R_50_1x.yaml MODEL.WEIGHTS $PATH_TO_CondInst_MS_R_50_1x

• Train CrossVIS R-50 with multi GPUs:

python tools/train_net.py --config configs/CrossVIS/R_50_1x.yaml --num-gpus $NUM_GPUS MODEL.WEIGHTS $PATH_TO_CondInst_MS_R_50_1x

Inference

python tools/test_vis.py --config-file configs/CrossVIS/R_50_1x.yaml --json-file datasets/youtubevis/annotations/valid.json --opts MODEL.WEIGHTS $PATH_TO_CHECKPOINT

The final results will be stored in results.json, just compress it with zip and upload to the codalab server to get the performance on validation set.

Acknowledgement ❤️

This code is mainly based on detectron2 and AdelaiDet, thanks for their awesome work and great contributions to the computer vision community!

Citation

If you find our paper and code useful in your research, please consider giving a star ⭐ and citation 📝 :

@InProceedings{Yang_2021_ICCV,
    author    = {Yang, Shusheng and Fang, Yuxin and Wang, Xinggang and Li, Yu and Fang, Chen and Shan, Ying and Feng, Bin and Liu, Wenyu},
    title     = {Crossover Learning for Fast Online Video Instance Segmentation},
    booktitle = {Proceedings of the IEEE/CVF International Conference on Computer Vision (ICCV)},
    month     = {October},
    year      = {2021},
    pages     = {8043-8052}
}