Understanding Tracking faces technology

ADsimpsonTracking faces will become a major security and surveillance system soon, very soon. Would you like to know how they do that?

An excellent Reseach Paper Introduction dome by M. A. A. Dewan, E. Granger, F. Roli, R. Sabourin, and G. L. Marcialis explain the technology and analyze forces and weaknesses of 3 major tracking softwares. An article to read on:

Picture from Paul Sastrasinh Website, no usage restriction, source.