There are no shortcuts
When
They have 10000 different images of every person to be positively identified (scanned image is of this person)
And
They have 10000 different images of every person that they want to negatively identify (scanned image is not of this person)
And
They have 10000 different images of each person they are going to scan and attempt an identification on.
Then
They might have a chance of reliably identifying someone that they have scanned.
It still will not be perfect though.
Biting the hand that feeds IT
