# Improvement of optical image by measurement reduction technique at parametric multiplexing

## TL;DR

This paper demonstrates how measurement reduction techniques can enhance the quality of optical images obtained through parametric multiplexing, leveraging quantum correlations and prior object information.

## Contribution

It introduces a novel approach combining measurement reduction with parametric multiplexing to improve optical image quality using quantum correlations and object sparsity.

## Key findings

- Enhanced image quality through measurement reduction.
- Utilization of quantum correlations in multiplexed images.
- Improved image reconstruction by incorporating object sparsity.

## Abstract

In the process of parametric optical image amplification, images are formed at new frequencies in addition to the amplified original image. We show that the parametric multiplexing of optical images can be used to produce an image with improved quality. As an example, we study the parametric amplification of an optical image at low-frequency pumping in which multiplexed optical images turn out to be quantum-correlated. Additional improvement is made possible by using the information about the object that is available to the researcher, in particular, about sparsity of its image. To take the available information into account, we apply the measurement reduction technique.