Patent ID: 8532737
Filing Date: 2013-09-10
Classification: A61B,G16H

Abstract:
1. Apparatus for automatically monitoring a subject's activity states, comprising: a video recorder for recording a time series of live images of a subject; and a computing device communicating with said video recorder that is programmed to: wherein t is a time during a preceding time interval T−Δ1≦t≦T−Δ2 for which a motion array has been derived, wherein Δ1>Δ2, M(t) is the number of elements (x,y) at which an element (x,y) of the motion array at time T indicates motion and an element (x,y) of the motion array at time t also indicates motion, and N(t) is the number of elements (x,y) at which an element of the motion array at time T indicates motion and an element (x,y) of the motion array at time t indicates absence of motion; and automatically infer information about the activity states of the subject from the thus calculated metrics of repetitive motion.