Face Recognition: How does it work


Face recognition is something that we have evolved to do. Infact we have a whole area of our brain dedicated to it, which is known as "fusiform face area". It is a part of human visual system, that is specialized for facial recognition.

It's actually a pretty complex problem for computers. So, lets took a look at this and the science behind it's working phenomenon.

How does it work?

AI identification tries to mimic the human method of face recognition. The system would divide the face into visible landmarks called nodal points. Which include things like depth of the eye socket, the distance between each eye and width of your nose, cheek bones, jaw lines etc. The difference between these areas is used to create a unique code of a person called face print. 

Some facial recognition technologies look at up to 80 factors on faces to identify unique features and ultimately identity.

Steps involving in face recognition:

Step 1: 
A picture of your face is captured from a photo or video. The software will only detect whether it is a face or not in the first process. 

Step 2:
Facial recognition software reads the geometry of your face. The system will read visible landmarks or nodal points. Some system identifies 68 factors and some uses 80 factors.

Step 3:
Your face print, a mathematical formula is compared to a database of known faces. According to the May 2018 report, the FBI had got the access over 412 million facial images for searches.

Uses of face recognition system:

Smartphones: Nowadays it's a common thing to unlock your phone just by seeing it. Modern smartphone uses 3-D technology to unlock your phone or grant permission to open apps or do other operations.

Airpots: Facial recognition systems can monitor people coming and going in airports. The Security Department of China and USA is using the technology to identify people who have overstayed their visas and also to detect criminals in airport. Customs officials at Washington Dulles International Airport made their first arrest using facial recognition in August 2018, catching an impostor trying to enter the country.

⏩ Facebook: It uses an algorithm to detect and recognize faces when you upload a photo to its platform. Facebook asks if you want to tag people in your photos. If you say yes, it creates a link to their profiles and give names to the photos of theirs'. Facebook can recognize faces with 98 percent accuracy.

Investigation: Now a days countries like America and China are using AI face recognition system as a investigating tool. 
Police forces of United Kingdom are also using 3-D AI face recognition system to catch thieves.

Some problems and their solutions:

Our faces do not remain same throughout our life, we age and our faces change. Our faces are not static, we always change our looks according to our mood. We look different when we are happy, sad or angry.

These were some common problems with the old face recognition system. But now we have a solution for all these silly problems, which we call deep face or 3-D face recognition system.

This new system converts a 2D photo into a 3D photo. Which will allow the system to recognize the face from different angles and at different levels of luminousity. This new technique can even recognize you at your weird expressions. This technique has also the ability to differentiate between twins, which makes it more promising. 

Just imagine:

A world without keys and passwords. You don't need to remember your passwords anymore. Everything will be opened just by looking at them. Your cars, doors, hidden chambers everything will be unlocked by facial biometrics.

This type of posts took a lot of efforts. Your opinions and sharing will be massively appreciated.

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