New Techniques In Gait Analysis Discover Identity Using the Way You Walk
Gait analysis has attracted attention because of the shortcomings of other biometric security techniques. Iris scans and face recognition require reasonably high-quality images, for example. They also generally require a cooperative subject, as do fingerprints.
By contrast, a person’s gait can be recognised from low-quality CCTV footage. In one leading technique, known as the gait energy image, computer vision techniques use video images of a person to create a blurred silhouette that is characteristic of their gait. A human operator links this gait “signature” to a person’s identity, allowing the system to automatically spot that person when they are next caught on film.
(via Cameras know you by your walk - tech - 20 September 2012 - New Scientist)