(Dezember 2017) Last generation of scanners tries to bypass the aforementioned difficulties. For example, a walk-through imag-ing system has been presented so that it can consider snapshots at different positions in order that multiple views are available. However, each view is independently considered and not merged into a global model. Each view can be independently considered or merged into a global modell. Other authors have focused on reducing the complexity of the required electronic by resorting to metasurface antennas with capacity to produce a wide set of radiation patterns by a simple frequency sweep.

On other side, conventional optical cameras have been able to benefit from multiview acquisitions for many years, enabling the possibility of building three-dimensional (3D) models or photogrammetry. This kind of techniques can be implemented either by a multicamera-setup, where the positions are accurately known, or by Structure from Motion (SfM) techniques where the camera (or, alternatively the object) is arbitrarily moved and, consequently, the position is also estimated from the images themself. Furthermore, it has been demon-strated in the recent years that the algorithms supporting this technique can run on real-time even on (relatively) low performance devices such as smartphones.