Spotting a subject in real-time at a distance, somewhere in the middle of a crowd, is a complex problem to solve.
This contrasts significantly to the typical passport e-gate style application, where a subject presents himself or herself, face on to a camera, in full view, in a well-lit area. Here they are compared only to the photograph that is on the passport, which is a simple 1-to-1 verification task; yet these systems are not 100% reliable in positive matching.
Discreet, non-confined facial recognition is exceptionally challenging, particularly when you are not able control the subject and environmental factors, or simply prefer not to influence or make the subject aware of a verification.
In these challenging conditions, SmartVis Face does the job assuredly and makes it look easy.