Contact-less Smart card has been used for the automatic fare collection system (AFC) for more than 30 years, and the industry is driven for innovation and new technology for AFC.

With the widely used facial recognition in the personal ID verification in custom and border, many suppliers have introduced the hand-free facial recognition technology in the AFC system recently. Will it be promising and bring convenience to users?

Let’s try to understand the technology itself and its limitations.

The biometrics system basically identifies the unique characteristics of the face, fingerprint, or other human body parts. It takes certain characteristics (unique points) as a reference for verification.

The more unique points are taken, the more accurate it is. However, if more unique points are used,  it will be difficult to get enough unique points for everyone in the first place and biometrics characteristics can change over time.

It comes down to 2 basic industrial parameters when we try to adopt facial recognition for AFC:

FAR: the False Acceptance Rate

The false acceptance rate, or FAR, is the measure of the likelihood that the biometric security system will incorrectly accept an access attempt by an unauthorized user.
FAR is used for hand-free facial recognition without presenting an identification number either by a smart card or by manual input.

FRR: the False Rejection Rate

The false recognition rate, or FRR, is the measure of the likelihood that the biometric security system will incorrectly reject an access attempt by an authorized user.
FRR is used for ID-based facial recognition by presenting an identification number.

In a typical system, FAR of 0.1% and FRR 0.001% are preset so that users can enroll and use without difficulty.

If hand-free facial recognition is used for AFC payment, FAR is used as a reference. FAR of 0.1% means that for every 1,000 usages, there is a chance to charge the wrong person.


Stemming from the above fact, do you think hand-free facial recognition will be a trend for AFC payment in the future?

Learn more about the Card based AFC system :

Post Author: Keith Lau

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