Recognizing
people by the way they walk can have numerous applications in the fields of
security, leisure or medicine. This new biometric technique that takes into
account the way a person walks and his/her silhouette offers significant advantages
as recognition can be done remotely and does not require the cooperation of the
subject.
Detecting
suspicious behavior (video surveillance), access control to buildings or to
restricted areas and demographic analysis of a population in terms of gender
and age range are just some of the possible applications of this technology.
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Walking Pattern |
The
role of biometrics as an artificial intelligence field is the identification of
an individual based on certain physical and non-transferable aspects of his/her
body, such as fingerprint or facial recognition. These are just two of the most
widely used and developed biometric sources because, as the researcher states,
"they are very reliable and difficult to fake, although both require that
the user is close to the sensor and collaborates in the recognition process,
and we can not always count on that” Hence, the importance of advancing in
complementary techniques.
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Silhouette |
We
all have a very personal way of walking. "Although it is easy to
manipulate and consciously change, each person walks in a different way" There
are experiments in which a person has to recognize familiar people just
watching his/her silhouette in motion and the success rate is very high,” It
has to be kept in mind that there are several factors that influence so that
each person has a unique way of walking. From a video of the subject walking,
the developed system distinguishes the background silhouette and it becomes a
sequence of silhouettes, placed one upon the other, resulting in a summary image.
This final representation stores all physical appearance and movement of the
person walking, thus getting a unique mark for each of them.
For
now, due to the margin of error that gait recognition has in not controlled
real scenarios, this technique would be much more effective if combined with
facial recognition. "They are complementary methods: the way you walk can
be detected from a distance and does not require a high-resolution image (it
can be done even against a back-light and with poor lighting), while face
recognition is performed close-up and with a high-resolution image. In this
way, surveys could be carried out in a wider range of conditions or, if both
methods are applicable, results could be more reliable thanks to contrasting
hypotheses about the identity of an individual generated by two biometric
systems."