# Non-line-of-sight 3D imaging with a single-pixel camera

## TL;DR

This paper presents a novel method for real-time, high-resolution 3D imaging of hidden scenes using a single-pixel camera combined with back-projection algorithms and high-resolution time-of-flight data, enabling color reconstruction without mechanical scanning.

## Contribution

It introduces a new approach for non-line-of-sight 3D imaging that achieves full color and high resolution with fast acquisition times using a single-pixel detector.

## Key findings

- Successful 3D color reconstruction of hidden scenes
- Imaging with no mechanical scanning parts
- Sub-second acquisition times

## Abstract

Real time, high resolution 3D reconstruction of scenes hidden from the direct field of view is a challenging field of research with applications in real-life situations related e.g. to surveillance, self-driving cars and rescue missions. Most current techniques recover the 3D structure of a non-lineof-sight (NLOS) static scene by detecting the return signal from the hidden object on a scattering observation area. Here, we demonstrate the full colour retrieval of the 3D shape of a hidden scene by coupling back-projection imaging algorithms with the high-resolution time-of-flight information provided by a single-pixel camera. By using a high effciency Single-Photon Avalanche Diode (SPAD) detector, this technique provides the advantage of imaging with no mechanical scanning parts, with acquisition times down to sub-seconds.