i do a face recognition and i got some problem. How to know someone does not have in our database

i am a new programmer and i do a face recognition system by using Alexnet (CNN). i got some problem that is how to know someone does not have in our database

so i have 44 classes and i test with new person that untrained. so the result is output show random id in database. it's wrong. i need to display that person is not in database

how do i slove this problem

thankyou in advance.

Answer 1

[Dheeraj Singh]

One way to do it is, by creating an extra class. Using AlexNet, whenever you give an image, you will get confidence value for each class.

So, whenever you give image of someone who is not in the dataset, then you will get low-confidence values for all the 44 classes. You can put some threshold depending on which you can classify the image into the 45thclass.