PyTorch implementation of our ICCV 2019 paper:

Liquid Warping GAN: A Unified Framework for Human Motion Imitation, Appearance Transfer and Novel View Synthesis

Please clone the newest codes.

[paper] [website] [Supplemental Material] [Dataset]

• 10/05/2019, optimize the minimal requirements of GPU memory (at least 3.8GB available).

• 10/24/2019, Imper-1.2.2, add the training document train.md.

• 07/04/2020, Add the evaluation metrics on iPER dataset.

Python 3.6+, Pytorch 1.2, torchvision 0.4, cuda10.0, at least 3.8GB GPU memory and other requirements. All codes are tested on Linux Distributions (Ubutun 16.04 is recommended), and other platforms have not been tested yet.

pip install -r requirements.txt
apt-get install ffmpeg

cd thirdparty/neural_renderer
python setup.py install

1. Download pretrains.zip from OneDrive or BaiduPan and then move the pretrains.zip to the assets directory and unzip this file.

wget -O assets/pretrains.zip https://1drv.ws/u/s!AjjUqiJZsj8whLNw4QyntCMsDKQjSg?e=L77Elv

2. Download checkpoints.zip from OneDrive or BaiduPan and then unzip the checkpoints.zip and move them to outputs directory.

wget -O outputs/checkpoints.zip https://1drv.ws/u/s!AjjUqiJZsj8whLNyoEh67Uu0LlxquA?e=dkOnhQ

3. Download samples.zip from OneDrive or BaiduPan, and then unzip the samples.zip and move them to assets directory.

wget -O assets/samples.zip "https://1drv.ws/u/s\!AjjUqiJZsj8whLNz4BqnSgqrVwAXoQ?e=bC86db"

If you want to get the results of the demo shown on the webpage, you can run the following scripts. The results are saved in ./outputs/results/demos

1. Demo of Motion Imitation

   python demo_imitator.py --gpu_ids 1

2. Demo of Appearance Transfer

   python demo_swap.py --gpu_ids 1

3. Demo of Novel View Synthesis

   python demo_view.py --gpu_ids 1

If you get the errors like RuntimeError: CUDA out of memory, please add the flag --batch_size 1, the minimal GPU memory is 3.8 GB.

If you want to test other inputs (source image and reference images from yourself), here are some examples. Please replace the --ip YOUR_IP and --port YOUR_PORT for Visdom visualization.

1. Motion Imitation

   • source image from iPER dataset

   python run_imitator.py --gpu_ids 0 --model imitator --output_dir ./outputs/results/  \
       --src_path      ./assets/src_imgs/imper_A_Pose/009_5_1_000.jpg    \
       --tgt_path      ./assets/samples/refs/iPER/024_8_2    \
       --bg_ks 13  --ft_ks 3 \
       --has_detector  --post_tune  \
       --save_res --ip YOUR_IP --port YOUR_PORT

   • source image from DeepFashion dataset

   python run_imitator.py --gpu_ids 0 --model imitator --output_dir ./outputs/results/  \
   --src_path      ./assets/src_imgs/fashion_woman/Sweaters-id_0000088807_4_full.jpg    \
   --tgt_path      ./assets/samples/refs/iPER/024_8_2    \
   --bg_ks 25  --ft_ks 3 \
   --has_detector  --post_tune  \
   --save_res --ip YOUR_IP --port YOUR_PORT

   • source image from Internet

   python run_imitator.py --gpu_ids 0 --model imitator --output_dir ./outputs/results/  \
       --src_path      ./assets/src_imgs/internet/men1_256.jpg    \
       --tgt_path      ./assets/samples/refs/iPER/024_8_2    \
       --bg_ks 7   --ft_ks 3 \
       --has_detector  --post_tune --front_warp \
       --save_res --ip YOUR_IP --port YOUR_PORT

2. Appearance Transfer

   An example that source image from iPER and reference image from DeepFashion dataset.

   python run_swap.py --gpu_ids 0 --model imitator --output_dir ./outputs/results/  \
       --src_path      ./assets/src_imgs/imper_A_Pose/024_8_2_0000.jpg    \
       --tgt_path      ./assets/src_imgs/fashion_man/Sweatshirts_Hoodies-id_0000680701_4_full.jpg    \
       --bg_ks 13  --ft_ks 3 \
       --has_detector  --post_tune  --front_warp --swap_part body  \
       --save_res --ip https://10.10.10.100 --port 31102

3. Novel View Synthesis

   python run_view.py --gpu_ids 0 --model viewer --output_dir ./outputs/results/  \
   --src_path      ./assets/src_imgs/internet/men1_256.jpg    \
   --bg_ks 13  --ft_ks 3 \
   --has_detector  --post_tune --front_warp --bg_replace \
   --save_res --ip https://10.10.10.100 --port 31102

If you get the errors like RuntimeError: CUDA out of memory, please add the flag --batch_size 1, the minimal GPU memory is 3.8 GB.

The details of each running scripts are shown in runDetails.md.

• The details of training iPER dataset from scratch are shown in train.md.

Run ./scripts/motion_imitation/evaluate.sh. The details of the evaluation on iPER dataset in his_evaluators.

In our paper, the results of LPIPS reported in Table 1, are calculated by 1 – distance score; thereby, the larger is more similar between two images. The beginning intention of using 1 – distance score is that it is more accurate to meet the definition of Similarity in LPIPS.

However, most other papers use the original definition that LPIPS = distance score; therefore, to eliminate the ambiguity and make it consistent with others, we update the results in Table 1 with the original definition in the latest paper.

@InProceedings{lwb2019,
    title={Liquid Warping GAN: A Unified Framework for Human Motion Imitation, Appearance Transfer and Novel View Synthesis},
    author={Wen Liu and Zhixin Piao, Min Jie, Wenhan Luo, Lin Ma and Shenghua Gao},
    booktitle={The IEEE International Conference on Computer Vision (ICCV)},
    year={2019}
}