Phys.org April 30, 2021
Full 3D information based on echo-location requires some form of scanning of the scene to provide the spatial location of the echo origin-points. Without this spatial information, imaging objects in 3D is a challenging task as the inverse retrieval problem is strongly ill-posed. Researchers in the UK showed that the temporal information encoded in the return echoes that are reflected multiple times within a scene is sufficient to faithfully render an image in 3D. Numerical modelling and an information theoretic perspective proved the concept and provided insight into the role of the multipath information. They experimentally demonstrated the concept by using both radio-frequency and acoustic waves for imaging individuals moving in a closed environment. According to the researchers the technique could be used to generate images through potentially any device equipped with microphones and speakers or radio antennae…read more. Open Access TECHNICAL ARTICLEÂ
Credit: University of Glasgow.