# Reconstruction Methods in THz Single-pixel Imaging

## TL;DR

This paper explores advanced image reconstruction techniques in THz single-pixel imaging, comparing regularization methods, addressing nonlinear calibration and phase recovery challenges, and discussing future research directions.

## Contribution

It provides a comprehensive comparison of regularization techniques and discusses nonlinear reconstruction issues specific to THz single-pixel cameras.

## Key findings

- Regularization techniques significantly affect reconstruction quality.
- Calibration and phase recovery pose nonlinear challenges.
- Future research directions are outlined for improved imaging.

## Abstract

The aim of this paper is to discuss some advanced aspects of image reconstruction in single-pixel cameras, focusing in particular on detectors in the THz regime. We discuss the reconstruction problem from a computational imaging perspective and provide a comparison of the effects of several state-of-the art regularization techniques. Moreover, we focus on some advanced aspects arising in practice with THz cameras, which lead to nonlinear reconstruction problems: the calibration of the beam reminiscent of the Retinex problem in imaging and phase recovery problems. Finally we provide an outlook to future challenges in the area.