What Is Face Detection?

Face-detection algorithms focus on the detection of frontal human faces. It is analogous to image detection in which the image of a person is matched bit by bit. Image matches with the image stores in database. Any facial feature changes in the database will invalidate the matching process.

A reliable face-detection approach based on the genetic algorithm and the Eigen-face technique:

Firstly, the possible human eye regions are detected by testing all the valley regions in the gray-level image. Then the genetic algorithm is used to generate all the possible face regions which include the eyebrows, the iris, the nostril, and the mouth corners.

Each possible face candidate is normalized to reduce both the lightning effect, which is caused by uneven illumination; and the shirring effect, which is due to head movement. The fitness value of each candidate is measured based on its projection on the Eigen-faces. After a number of iterations, all the face candidates with a high fitness value are selected for further verification. At this stage, the face symmetry is measured and the existence of the different facial features is verified for each face candidate.

Face Detection Solution

• Face detection is used in biometrics, often as a part of (or together with) a facial recognition system. It is also used in video surveillance, human-computer interface, and image database management.

• They help in evidence: If you want to use your surveillance system to collect evidence, the face detection CCTV cameras will provide you better help than cameras that can’t detect the human face. This is because these cameras are good at capturing the face of the people who walk within their fields of coverage. This makes it so easy for you to gather the evidence you need.

• They deter crime: All types of surveillance systems help to deter crime. Face recognition systems will do much better. Criminals will be scared to break into your premise or buildings because they know the first thing that the surveillance system will do is capture their faces.

• Better monitoring of activities and scenarios: There are a lot of activities that take place in a given building on a daily basis. When you upgrade your surveillance system so that it can have the face detection features, you will be to monitor these activities better.