face-alignment

Face Recognition

Detect facial landmarks from Python using the world's most accurate face alignment network, capable of detecting points in both 2D and 3D coordinates.

Build using FAN's state-of-the-art deep learning based face alignment method.

Note: The lua version is available here.

For numerical evaluations it is highly recommended to use the lua version which uses indentical models with the ones evaluated in the paper. More models will be added soon.

Features

Detect 2D facial landmarks in pictures

import face_alignment
from skimage import io

fa = face_alignment.FaceAlignment(face_alignment.LandmarksType.TWO_D, flip_input=False)

input = io.imread('../test/assets/aflw-test.jpg')
preds = fa.get_landmarks(input)

Detect 3D facial landmarks in pictures

import face_alignment
from skimage import io

fa = face_alignment.FaceAlignment(face_alignment.LandmarksType.THREE_D, flip_input=False)

input = io.imread('../test/assets/aflw-test.jpg')
preds = fa.get_landmarks(input)

Process an entire directory in one go

import face_alignment
from skimage import io

fa = face_alignment.FaceAlignment(face_alignment.LandmarksType.TWO_D, flip_input=False)

preds = fa.get_landmarks_from_directory('../test/assets/')

Detect the landmarks using a specific face detector.

By default the package will use the SFD face detector. However the users can alternatively use dlib, BlazeFace, or pre-existing ground truth bounding boxes.

import face_alignment

# sfd for SFD, dlib for Dlib and folder for existing bounding boxes.
fa = face_alignment.FaceAlignment(face_alignment.LandmarksType.TWO_D, face_detector='sfd')

Running on CPU/GPU

In order to specify the device (GPU or CPU) on which the code will run one can explicitly pass the device flag:

import torch
import face_alignment

# cuda for CUDA, mps for Apple M1/2 GPUs.
fa = face_alignment.FaceAlignment(face_alignment.LandmarksType.TWO_D, device='cpu')

# running using lower precision
fa = fa = face_alignment.FaceAlignment(face_alignment.LandmarksType.TWO_D, dtype=torch.bfloat16, device='cuda')

Please also see the examples folder

Supported face detectors

# dlib (fast, may miss faces)
model = FaceAlignment(landmarks_type= LandmarksType.TWO_D, face_detector='dlib')

# SFD (likely best results, but slowest)
model = FaceAlignment(landmarks_type= LandmarksType.TWO_D, face_detector='sfd')

# Blazeface (front camera model)
model = FaceAlignment(landmarks_type= LandmarksType.TWO_D, face_detector='blazeface')

# Blazeface (back camera model)
model = FaceAlignment(landmarks_type= LandmarksType.TWO_D, face_detector='blazeface', face_detector_kwargs={'back_model': True})

Installation

Requirements

• Python 3.5+ (it may work with other versions too). Last version with support for python 2.7 was v1.1.1
• Linux, Windows or macOS
• pytorch (>=1.5)

While not required, for optimal performance(especially for the detector) it is highly recommended to run the code using a CUDA enabled GPU.

Binaries

The easiest way to install it is using either pip or conda:

Using pip	Using conda
pip install face-alignment	conda install -c 1adrianb face_alignment

Alternatively, bellow, you can find instruction to build it from source.

From source

Install pytorch and pytorch dependencies. Please check the pytorch readme for this.

Get the Face Alignment source code

git clone https://github.com/1adrianb/face-alignment

Install the Face Alignment lib

pip install -r requirements.txt
python setup.py install

Docker image

A Dockerfile is provided to build images with cuda support and cudnn. For more instructions about running and building a docker image check the orginal Docker documentation.

docker build -t face-alignment .

How does it work?

While here the work is presented as a black-box, if you want to know more about the intrisecs of the method please check the original paper either on arxiv or my webpage.

Contributions

All contributions are welcomed. If you encounter any issue (including examples of images where it fails) feel free to open an issue. If you plan to add a new features please open an issue to discuss this prior to making a pull request.

Citation

@inproceedings{bulat2017far,
  title={How far are we from solving the 2D \& 3D Face Alignment problem? (and a dataset of 230,000 3D facial landmarks)},
  author={Bulat, Adrian and Tzimiropoulos, Georgios},
  booktitle={International Conference on Computer Vision},
  year={2017}
}

For citing dlib, pytorch or any other packages used here please check the original page of their respective authors.

Acknowledgements

• To the pytorch team for providing such an awesome deeplearning framework
• To my supervisor for his patience and suggestions.
• To all other python developers that made available the rest of the packages used in this repository.