How to know name of the person in the image?
You can use the filename of the image for that purpose. All you need to do is keep the filenames stored somewhere in your application, alongside the Mat objects.
I implemented face recognition algorithm in raspberry pi(python 2.7 is was used), i have many sets of faces, if the captured face is one in database then the face is detected(i am using eigen faces algo). My question is can i know whose face(persons name) is detected? (can we have sort of tags to image and display name corresponding to it when the face is detected) Note: OpenCV used