Add L2Distance for Unknown class
Add L2Distance for Unknown class

SeonghoBaek/RealtimeCamera,SeonghoBaek/RealtimeCamera,SeonghoBaek/RealtimeCamera,SeonghoBaek/RealtimeCamera,SeonghoBaek/RealtimeCamera,SeonghoBaek/RealtimeCamera,SeonghoBaek/RealtimeCamera,SeonghoBaek/RealtimeCamera,SeonghoBaek/RealtimeCamera