Indoor Location Estimation of a Moving Subject Based on a Simple Motion Sensor Array

The purpose of this study is to estimate human location in a room while protecting privacy. Our previous studies have revealed that a sensor array containing several infrared sensors could recognize human locations and preserve privacy. However, the previous location estimations were conducted on stationary human locations. In this paper, we aim to make the estimation more realistic and to estimate and track the locations of a walking person. That is, we want to estimate two functions x(D) and y(D) based on the observed sensor data D, where (x, y) is the coordinate of the location. Experimental results show that the estimated locations follow the real human locations very well even though we do not use the correlation between frames. This also implies that "tracking" is possible using a relatively small and sparse sensor array.