This is an UNOFFICIAL implementation of the paper "Reconstructing Personalized Semantic Facial NeRF Models From Monocular Video". The authors released the inference code here, while we implements the training part according to the paper in this repo. Besides, we train a torso net based on RAD-NeRF. The performance of this implementation may differ from the original paper. An example test result can be found from data/example.mp4

This implementation relies on a private blendshape extractor which can not be open-source, so you could try using the FaceWarehouse from the original paper or using other blendshape basis like BFM2009. This repo -> (https://github.com/sicxu/Deep3DFaceRecon_pytorch) may help.

0. Prepare some model weights according to here (Data pre-processing/preparation part).

1. Put the video under {data/vids} and run python data_utils/process.py VIDEO_NAME

2. We extract blendshapes and saving as files to data/CORRESPONDING_DATASET_NAME/, including expr.npy, expr_max.npy, expr_min.npy. The first one contains an array whose shape is [image_num_from_dataset, expression_blendshape_dim]. And the latter two contrain the maximum and the minimum expression caculated from the the first one. You could extract blendshapes using your extractor and saving as the similar format.

# train head part
python main_nerf.py data/DATASET_NAME --workspace EXPERIMENT_FILE_PATH --test_fps 25 --network blend4_noamb --use_patch_loss --patch_size 32 --train_epoch 15 --downscale 1 --cuda_ray --preload 2 --test_num 500 --expr_dim {expression_blendshape_dim} --update_extra_interval 1000 --fp16

# train torso part
python main_nerf.py data/DATASET_NAME --workspace EXPERIMENT_FILE_PATH --test_fps 25 --network blend4_noamb --use_patch_loss --patch_size 32 --train_epoch 15 --downscale 1 --cuda_ray --preload 2 --test_num 500 --expr_dim {expression_blendshape_dim}  --update_extra_interval 1000 --fp16 --torso --head_ckpt OUTPUT_PTH_FILE_PATH_FROM_FIRST_STEP

python main_nerf.py data/DATASET_NAME --workspace EXPERIMENT_FILE_PATH --test_fps 25 --network blend4_noamb --use_patch_loss --patch_size 32 --train_epoch 15 --downscale 1 --cuda_ray --preload 2 --test_num 500 --expr_dim {expression_blendshape_dim} --update_extra_interval 1000 --fp16 --torso --head_ckpt OUTPUT_PTH_FILE_PATH_FROM_FIRST_STEP --test

• NeRFBlendshape
• RAD-NeRF
• torch-ngp

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