1 Introduction

2 Constrained Local Model-Based Methods
2.1 Shape Model
2.2 Local Expert
2.3 Improvements and Extensions

3 Active Appearance Model-Based Methods
3.1 Active Appearance Model
3.2 Improvements and Extensions

4 Regression-Based Methods

5 Other Methods
5.1 Graphical Model-based Methods
5.2 Joint Face Alignment Methods
5.3 Independent Facial Feature Point Detectors
5.4 Deep Learning-Based Methods

6 Evaluations
6.1 Databases
6.2 Comparisons and Discussions

7 Conclusion