– How accurate is facial recognition on phones and laptops? Peoples weight changes over the course of owning a phone yet facial recognition doesn’t need reconfiguring despite the person looking different.
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Facial recognition on a dedicated device doesn’t have to meet the same challenges as it does if was general purpose.
The facial recognition software uses landmark locations and only has to confirm or deny one choice.
The face in front matches the landmarks of the profile or not.
General purpose facial recognition has to be able to determine a probably match of of 100s of million possible matches.
Here is a link about how the software works.
https://us.norton.com/internetsecurity-iot-how-facial-recognition-software-works.html#
Certain things won’t change, a big part of facial recognition has to do with the eyes and their spacing, as well as their spacial relationship with other features. It’s pretty accurate, but not 100%.
It is not so different from how you recognize people. If someone has lost a lot of weight it takes a bit longer to recognize a friend but you are still able to do so. Facial recognition is advanced enough to have similar capabilities than human beings.
Interestingly enough it depends on the quality of the data used to train the facial recognition software. For the sake of an example, suppose that the algorithm was trained only with young faces. Then the software will have problem distinguishing older ones. So, for accurate facial recognition the software need to be trained with faces of all countries, genders and ages to avoid blind spots.
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