News

• 05/17/2021 To make the comparison on ZJU-MoCap easier, we save quantitative and qualitative results of other methods at here, including Neural Volumes, Multi-view Neural Human Rendering, and Deferred Neural Human Rendering.
• 05/13/2021 To make the following works easier compare with our model, we save our rendering results of ZJU-MoCap at here and write a document that describes the training and test protocols.
• 05/12/2021 The code supports the test and visualization on unseen human poses.
• 05/12/2021 We update the ZJU-MoCap dataset with better fitted SMPL using EasyMocap. We also release a website for visualization. Please see here for the usage of provided smpl parameters.

Neural Body: Implicit Neural Representations with Structured Latent Codes for Novel View Synthesis of Dynamic Humans

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Neural Body: Implicit Neural Representations with Structured Latent Codes for Novel View Synthesis of Dynamic Humans
Sida Peng, Yuanqing Zhang, Yinghao Xu, Qianqian Wang, Qing Shuai, Hujun Bao, Xiaowei Zhou
CVPR 2021

Any questions or discussions are welcomed!

Installation

Please see INSTALL.md for manual installation.

Installation using docker

Please see docker/README.md.

Thanks to Zhaoyi Wan for providing the docker implementation.

Run the code on the custom dataset

Please see CUSTOM.

Run the code on People-Snapshot

Please see INSTALL.md to download the dataset.

We provide the pretrained models at here.

Process People-Snapshot

We already provide some processed data. If you want to process more videos of People-Snapshot, you could use tools/process_snapshot.py.

You can also visualize smpl parameters of People-Snapshot with tools/vis_snapshot.py.

Visualization on People-Snapshot

Take the visualization on female-3-casual as an example. The command lines for visualization are recorded in visualize.sh.

1. Download the corresponding pretrained model and put it to $ROOT/data/trained_model/if_nerf/female3c/latest.pth.

2. Visualization:

   • Visualize novel views of single frame

   python run.py --type visualize --cfg_file configs/snapshot_exp/snapshot_f3c.yaml exp_name female3c vis_novel_view True num_render_views 144
   

   

   • Visualize views of dynamic humans with fixed camera

   python run.py --type visualize --cfg_file configs/snapshot_exp/snapshot_f3c.yaml exp_name female3c vis_novel_pose True
   

   

   • Visualize mesh

   # generate meshes
   python run.py --type visualize --cfg_file configs/snapshot_exp/snapshot_f3c.yaml exp_name female3c vis_mesh True train.num_workers 0
   # visualize a specific mesh
   python tools/render_mesh.py --exp_name female3c --dataset people_snapshot --mesh_ind 226
   

   

3. The results of visualization are located at $ROOT/data/render/female3c and $ROOT/data/perform/female3c.

Training on People-Snapshot

Take the training on female-3-casual as an example. The command lines for training are recorded in train.sh.

1. Train:

   # training
   python train_net.py --cfg_file configs/snapshot_exp/snapshot_f3c.yaml exp_name female3c resume False
   # distributed training
   python -m torch.distributed.launch --nproc_per_node=4 train_net.py --cfg_file configs/snapshot_exp/snapshot_f3c.yaml exp_name female3c resume False gpus "0, 1, 2, 3" distributed True
   

2. Train with white background:

   # training
   python train_net.py --cfg_file configs/snapshot_exp/snapshot_f3c.yaml exp_name female3c resume False white_bkgd True
   

3. Tensorboard:

   tensorboard --logdir data/record/if_nerf
   

Run the code on ZJU-MoCap

Please see INSTALL.md to download the dataset.

We provide the pretrained models at here.

Potential problems of provided smpl parameters

1. The newly fitted parameters locate in new_params. Currently, the released pretrained models are trained on previously fitted parameters, which locate in params.
2. The smpl parameters of ZJU-MoCap have different definition from the one of MPI's smplx.
   • If you want to extract vertices from the provided smpl parameters, please use zju_smpl/extract_vertices.py.
   • The reason that we use the current definition is described at here.

It is okay to train Neural Body with smpl parameters fitted by smplx.

Test on ZJU-MoCap

The command lines for test are recorded in test.sh.

Take the test on sequence 313 as an example.

1. Download the corresponding pretrained model and put it to $ROOT/data/trained_model/if_nerf/xyzc_313/latest.pth.
2. Test on training human poses:

   python run.py --type evaluate --cfg_file configs/zju_mocap_exp/latent_xyzc_313.yaml exp_name xyzc_313
   

3. Test on unseen human poses:

   python run.py --type evaluate --cfg_file configs/zju_mocap_exp/latent_xyzc_313.yaml exp_name xyzc_313 test_novel_pose True
   

Visualization on ZJU-MoCap

Take the visualization on sequence 313 as an example. The command lines for visualization are recorded in visualize.sh.

1. Download the corresponding pretrained model and put it to $ROOT/data/trained_model/if_nerf/xyzc_313/latest.pth.

2. Visualization:

   • Visualize novel views of single frame

   python run.py --type visualize --cfg_file configs/zju_mocap_exp/latent_xyzc_313.yaml exp_name xyzc_313 vis_novel_view True
   

   

   • Visualize novel views of single frame by rotating the SMPL model

   python run.py --type visualize --cfg_file configs/zju_mocap_exp/latent_xyzc_313.yaml exp_name xyzc_313 vis_novel_view True num_render_views 100
   

   

   • Visualize views of dynamic humans with fixed camera

   python run.py --type visualize --cfg_file configs/zju_mocap_exp/latent_xyzc_313.yaml exp_name xyzc_313 vis_novel_pose True num_render_frame 1000 num_render_views 1
   

   

   • Visualize views of dynamic humans with rotated camera

   python run.py --type visualize --cfg_file configs/zju_mocap_exp/latent_xyzc_313.yaml exp_name xyzc_313 vis_novel_pose True num_render_frame 1000
   

   

   • Visualize mesh

   # generate meshes
   python run.py --type visualize --cfg_file configs/zju_mocap_exp/latent_xyzc_313.yaml exp_name xyzc_313 vis_mesh True train.num_workers 0
   # visualize a specific mesh
   python tools/render_mesh.py --exp_name xyzc_313 --dataset zju_mocap --mesh_ind 0
   

   

3. The results of visualization are located at $ROOT/data/render/xyzc_313 and $ROOT/data/perform/xyzc_313.

Training on ZJU-MoCap

Take the training on sequence 313 as an example. The command lines for training are recorded in train.sh.

1. Train:

   # training
   python train_net.py --cfg_file configs/zju_mocap_exp/latent_xyzc_313.yaml exp_name xyzc_313 resume False
   # distributed training
   python -m torch.distributed.launch --nproc_per_node=4 train_net.py --cfg_file configs/zju_mocap_exp/latent_xyzc_313.yaml exp_name xyzc_313 resume False gpus "0, 1, 2, 3" distributed True
   

2. Train with white background:

   # training
   python train_net.py --cfg_file configs/zju_mocap_exp/latent_xyzc_313.yaml exp_name xyzc_313 resume False white_bkgd True
   

3. Tensorboard:

   tensorboard --logdir data/record/if_nerf
   

Citation

If you find this code useful for your research, please use the following BibTeX entry.

@inproceedings{peng2021neural,
  title={Neural Body: Implicit Neural Representations with Structured Latent Codes for Novel View Synthesis of Dynamic Humans},
  author={Peng, Sida and Zhang, Yuanqing and Xu, Yinghao and Wang, Qianqian and Shuai, Qing and Bao, Hujun and Zhou, Xiaowei},
  booktitle={CVPR},
  year={2021}
}