FOF: Learning Fourier Occupancy Field for Monocular Real-time Human Reconstruction

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Environment

To run this code, follow the following instructions.

conda create -n fof python=3.10
conda activate fof

# visit https://pytorch.org/
# install latest pytorch
# for example:
# conda install pytorch torchvision torchaudio pytorch-cuda=12.1 -c pytorch -c nvidia

pip install tqdm
pip install opencv-python
pip install open3d
pip install scikit-image

You will need the cuda corresponding to your pytorch to compile the tools below.

pip install Cython
pip install pybind11
# 1. fof
cd lib/fof
sh compile.sh
cd ../..

# 2. mc
# You need Eigen to compile this.
cd lib/mc
sh compile.sh
cd ../..

Check train.py and test.py, have fun with this repo!

Checkpoints

You can get pretrained checkpoints here. Put them in ./ckpt. They should be organized as shown below:

FOF
├─lib
└─ckpt
    ├─model32.pth
    ├─model48.pth
    ├─netB.pth
    └─netF.pth

model32.pth and model48.pth correspond to HR-Net-32 and HR-Net-48 version, respectively. Both of them are trained on THuman2.0 dataset only.

Data preprocess

You will need triangle mesh and corresponding SMPL-X mesh to train the model. Texture is not needed and the meshes don't have to be watertight (which is better)! However, we prefer the meshes are clean, without floating fragments. Check the data preprocess code preprocess.py for more details. You can see the seven steps we do in the file. Before run it, you will need to

pip install cyminiball

Check the code, you can use the function work to process you data. If you are using THuman2.0 dataset, you can organize your data as shown below.

Your THuman2.0 mesh or your scanned mesh. (Only xxxx.obj is used)

$base_mesh        # line 139 in preprocess.py
├───0000
|   ├─0000.obj
|   ├─material0.jpeg
|   └─material0.mtl
├───0001
├───0002
...
└───0525

Corresponding SMPL-X mesh. (SMPL is also OK, but you will need to modify the dataloader yourself. Just a few lines.)

$base_smpl        # line 140 in preprocess.py
├───0000
|   ├─mesh_smplx.obj
|   └─smplx_param.pkl
├───0001
├───0002
...
└───0525

The path you want to store the processed data. Dataloader also read data from it. You don't need to create it. After running preprocess.py, it looks like:

$base_out         # line 141 in preprocess.py
├───100k-180
|   ├─0000.ply
|   ├─0001.ply
|   ...
|   └─0525.ply
├───smpl-180
|   ├─0000.ply
|   ├─0001.ply
|   ...
|   └─0525.ply
└───train_th2.txt

train_th2.txt lists the meshes used for training. It should look like:

0000
0001
0008
...

You can check the .ply meshes in meshlab. Make sure them are well-aligned.

Finally, you can change the line 26 and line 27 in the lib\dataset_mesh_only.py to the right path. Alternatively, you can identify them when using the TrainSet class. Now you can enjoy your training!