2D	Two-dimensional
300W	300 faces in-the-Wild
3D	Three-dimensional
AFLW 2000-3D	Annotated Facial Landmarks in the Wild with 2000 three-dimension
AUC	Area Under the Curve
CED	Cumulative Error Distribution
CLM	Constrained Local Model
CNN	Convolutional Neural Network
DCNN	Deep Convolutional Neural Network
DenseNets	Densely Connected Convolutional Networks
DSC	Dilated Skip Convolution
FCNs	Fully Convolutional Networks
GPU	Graphics Processing Unit
LAI	Local Appearance Initialization
LFPW	The Labeled Face Parts in-the-Wild
NME	Normalized Mean Error
ReLU	Rectified Linear Unit