This is the code repo for Facial Details Synthesis From Single Input Image. [Paper] [Supplemental Material]

This repository consists of 5 individual parts: DFDN, emotionNet, landmarkDetector, proxyEstimator and faceRender.

DFDN is used to estimate displacement map, and its network architecture is based on junyanz's pix2pix
For landmarkDetector and FACS-based expression detector (you can choose between this and emotionNet), we use a simplified version of openFace
proxyEstimator is used to generate proxy mesh using expression/emotion prior. It is modified based on patrikhuber's fantastic work eos
faceRender is used for interactive rendering

We would like to thank each of the related projects for their great work.

Facial Details Synthesis

Anpei Chen, Zhang Chen, Guli Zhang, Ziheng Zhang, Kenny Mitchell, Jingyi Yu

We present a single-image 3D face synthesis technique that can handle challenging facial expressions while recovering fine geometric details. Our technique employs expression analysis for proxy face geometry generation and combines supervised and unsupervised learning for facial detail synthesis. On proxy generation, we conduct emotion prediction to determine a new expression-informed proxy. On detail synthesis, we present a Deep Facial Detail Net (DFDN) based on Conditional Generative Adversarial Net (CGAN) that employs both geometry and appearance loss functions. For geometry, we capture 366 high-quality 3D scans from 122 different subjects under 3 facial expressions. For appearance, we use additional 163K in-the-wild face images and apply image-based rendering to accommodate lighting variations. Comprehensive experiments demonstrate that our framework can produce high-quality 3D faces with realistic details under challenging facial expressions.

Features

Functionality
- Proxy estimation with expression/emotion prior
- Facial details prediction, i.e. winkles
- Renderer for results (proxy mesh + normalMap/displacementMap)
Input: Single image or image folder
Output: Proxy mesh & texture, detailed displacementMap and normalMap
OS: Windows 10

Set up environment

Install windows version of Anaconda Python3.7 and pytorch
[Optional] Install tensorflow and keras if you want to use emotion prior (emotionNet)

Released version

Download the released package.

Release v0.1.0 [Google Drive, OneDrive]
Download models and pre-trained weights.

DFDN checkpoints [Google Drive, OneDrive] unzip to ./DFDN/checkpoints

landmark models [Google Drive, OneDrive] unzip to ./landmarkDetector

[Optional] emotionNet checkpoints [Google Drive, OneDrive] unzip to ./emotionNet/checkpoints
Install BFM2017
- Install eos-py by pip install --force-reinstall eos-py==0.16.1
- Download BFM2017 and copy model2017-1_bfm_nomouth.h5 to ./proxyEstimator/bfm2017/
- Run python convert-bfm2017-to-eos.py to generate bfm2017-1_bfm_nomouth.bin in ./proxyEstimator/bfm2017/ folder
Have fun!

Usage

For proxy estimation,
```
python proxyPredictor.py -i path/to/input/image -o path/to/output/folder [--FAC 1][--emotion 1]
```
- For batch processing, you can set -i to a image folder.
- For prior features, you can optional choose one of those two priors: FACS-based expression prior, --FAC 1, emotion prior, --emotion 1.
example: python proxyPredictor.py -i ./samples/proxy -o ./results

For facial details estimation,
```
python facialDetails.py -i path/to/input/image -o path/to/output/folder
```
example:

python facialDetails.py -i ./samples/details/019615.jpg -o ./results

python facialDetails.py -i ./samples/details -o ./results

Compiling

We suggest you directly download the released package for convenience. If you are interested in compiling the source code, please go through the following guidelines.

First, clone the source code,

git clone https://github.com/apchenstu/Facial_Details_Synthesis.git --recursive
cd to the root of each individual model then start compiling,

landmarkDetector
- Executing the download_libraries.ps1 and download_models.ps1 with PowerShell script.
- Open OpenFace.sln using Visual Studio and compile the code.
  
  After compiling, the excuse file would located in /x64/Release/FaceLandmarkImg.exe
textureRender
- install with
```
 mkdir build && cd build
 cmake -A X64 -D CMAKE_PREFIX_PATH=../thirds ../src
```
- Open textureRender.sln using Visual Studio and compile the code.
  
  After compiling, the excuse file would located in Release/textureRender.exe
proxyEstimator
- install vcpkg
- install package under vcpkg folder: ./vcpkg install opencv boost --triplet x64-windows
- Install with,
```
mkdir build && cd build
cmake .. -A X64 -DCMAKE_TOOLCHAIN_FILE=[vcpkg root]\scripts\buildsystems\vcpkg.cmake
```
- Open eos.sln using Visual Studio and compile the code.
  
  After compiling, the excuse file would located in Release/textureRender.exe
  
  For more details, please refer to this repo.
faceRender
- Install with
```
 mkdir build && cd build
 cmake -A X64 -D CMAKE_PREFIX_PATH=../thirds ../src
```
- Open eos.sln using Visual Studio and compile the code.
  
  After compiling, the excuse file would located in build\Release
  
  Note: The visualizer currently only supports mesh + normalMap, but will also support displacementMap in the near future.
After compiling, please download DFDN checkpoints, unzip to ./DFDN/checkpoints. Then you are free to use.

Others

On the way .....

Citation

If you find this code useful to your research, please consider citing:

@article{chen2019photo,
  title     = {Photo-Realistic Facial Details Synthesis from Single Image},
  author    = {Anpei Chen, Zhang Chen, Guli Zhang, Ziheng Zhang, Kenny Mitchell and Jingyi Yu},
  journal   = {arXiv preprint arXiv:1903.10873},
  year      = {2019}
}

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