I appreciate you coming here and commenting. One question, do you construct "templates" for faces that are unmatched by existing templates that are correlated?

I appreciate you coming here and commenting. One question, do you construct "templates" for faces that are unmatched by existing templates that are correlated? This would allow a shadow face recognition profile to be generated that could be later matched to a known image. I've had face recognition turned off anyway, and I'm not particularly concerned about it, I'm interested though in how internally FB manages "unknown" images, shadow profiles etc.