Thanks for the reply. Yes I need lots of reading to do. My project is to detect multiple person at a time, just to display name of the person from database(if present) and to take log of them.
I'm thinking of buying this : http://www.flipkart.com/logitech-c310-webcam/p/itmczzccgktpvkjy?pid=ACCCZZC9ZGAH97QE&ref=12e60b4d-a3d9-4261-ad2a-09f48d3230c3&srno=t_8&otracker=from-search&query=webcam
I'm doing this on Labview, Imaq vision assistant..........