Non-Line-of-Sight Three-Dimensional Imaging with a Single-Pixel Camera

Three-dimensional (3D) reconstruction of a scene hidden from the direct line of sight is an emerging challenge, with applications in defense, security, and surveillance. The authors demonstrate 3D full-color retrieval of a hidden scene, from high-resolution time-of-flight information provided by a single-pixel camera. By combining a high-efficiency single-photon avalanche diode (SPAD) detector and a high-refresh-rate digital mirror device (DMD), this technique allows the 3D recovery of a hidden scene, with acquisition times of less than a second, and with no mechanical scanning parts.