Introduction - If you have any usage issues, please Google them yourself
In recent years, face detection has been thoroughly studied
due to its wide potential applications, including face recognition,
human-computer interaction, video surveillance, etc.
Especially, in the context of face recognition, the detection of
faces along with the detection of some fiducial points, such
as the eyes and mouth, is the first step of the face recognition
system, and this step largely affects the performance of the
overall system.