Abstract: The invention provides a method and a system of monitoring a subject. The method comprises the steps of monitoring, from a first angle of detection, a space in which the subject is located to obtain data of the subject from a first perspective view in accordance with the first angle of detection; converting the obtained data of the subject into a three-dimensional data set; processing the three-dimensional data set to create an image of the subject from a second perspective view, said second perspective view being created at a second angle different from the first angle of detection; and analyzing the created image from the second perspective view to determine, calculate, or select one or more characteristics relating to activity of the subject being monitored.