Fall detection systems which use cameras to track the
actions of people require multiple cameras to cover all of the
rooms, thus this increases the cost, and it may violate privacy
(e.g. in bathrooms) [2, 3]. Another problem with cameras is the
difficulty in keeping track of all the actions of an individual, in
the case of more than one person in the same place. This
reduces the accuracy of cameras, which need to recognize
identified individuals.