Passive Observer of Activities for Aging in Place Using a Network of RGB-D Sensors

Figure 2

Different viewpoints of a ChArUco calibration prop/object. Depending on the location and configuration of each sensor with respect to the monitoring area, one needs to ensure that each sensor has an unambiguous view of the calibration prop. For all the experiments associated with this paper, the physical size of the marker is adjusted, and its placement is configured with respect to the common viewing angles of all of the sensors in order to ensure accurate calibration results. The figure shows four typical views of the common calibration object with respect to the sensor.