Face Recognition Parameters

edit

Hello, am currently working with a face detection - recognition system, and currently am in the testing stage, but i am getting a bad recognition results either as a

a)false positive (person X is identified as Person Y),

b) negative (Person X is identified as Unknown),

c) few positives (Person X is identified as Person X)

I have searched a lot, and came to many important points.

1. The training

my case : i trained 50 face for each person, each face image was around [150150 to 200200] but i wasn't able to recognize any face that were 5050 or even 8080, how could i recognize them, more faces into training ? or what should i do ?

I'm using python 3, OpenCV 3.2 and LBPH as recognizer. Thanks for your time.