3D Vision and Radiological Sensor Fusion

Radiological sensors are depth sensors. However, unlike a conventional depth sensor, they sense the proximity of only radioactive portions of the scene. Tracking such sources in 3D can impact homeland security, airport and port surveillance and the military. Unfortunately, the radiological sensors with the highest SNR, the fastest ready time and the lowest prices are unidirectional – i.e. they integrate all radiation from a sphere of directions centered at the sensor. We combine such devices with commercial depth sensors to break this directional ambiguity. We first survey and introduce radiological sensing as a interesting application area for the 3D vision community. Next, we propose a joint calibration algorithm for 3D sensors and unidirectional, or single cell, radiological sensors. Finally, we show applications for tracking people carrying radiological sources. Read More…