What is the principle of face recognition?

The traditional face recognition technology is mainly based on visible light images, which is also a familiar recognition method and has been developed for more than 30 years. However, this method has insurmountable defects, especially when the ambient illumination changes, the recognition effect will drop sharply, which can not meet the needs of the actual system. There are three-dimensional image face recognition and thermal imaging face recognition to solve the illumination problem. However, these two technologies are far from mature, and the recognition effect is not satisfactory.

A rapidly developing solution is multi-light source face recognition technology based on active near-infrared images. It can overcome the influence of light change and achieve excellent recognition performance. The overall system performance exceeds that of 3D face recognition in accuracy, stability and speed. This technology has developed rapidly in recent two or three years, which makes face recognition technology gradually practical.

Extended data:

Compared with other types of biometric identification, face recognition has the following characteristics:

1, optional: users can collect face images almost unconsciously without the special cooperation of face collection equipment, so this sampling method is not mandatory;

2. Non-contact: users can get face images without direct contact with equipment;

3. Concurrency: Multiple faces can be sorted, judged and recognized in practical application scenarios;

4. Visual features: judging people by their appearances, simple operation, intuitive results and good concealment.

Baidu Encyclopedia-Face Recognition

Baidu Encyclopedia-Face Recognition Technology