- DNA recognition is the most accurate trait, but it requires the most intrusive procedures.
- Fingerprints are accurate and not so intrusive, but requires an aware and collaborative user. In some cases the result could be of bad quality, for example in case of hard workers; Fingerprint recognition can be associated with a bad feeling of being suspected.
- Face recognition’s accuracy could be improved, but it can be achieved without user awareness. People are used to be photographed.
Face can be modeled by a set of points using the Facial Animation Parameters in MPEG-4.