Negative exponential behavior of image mutual information for pseudo-thermal light ghost imaging: observation, modeling, and verification

Junhui Li; Bin Luo; Dongyue Yang; Longfei Yin; Guohua Wu; Hong Guo

doi:10.1016/j.scib.2017.04.008

Negative exponential behavior of image mutual information for pseudo-thermal light ghost imaging: observation, modeling, and verification

Sci Bull (Beijing). 2017 May 30;62(10):717-723. doi: 10.1016/j.scib.2017.04.008. Epub 2017 Apr 18.

Authors

Junhui Li¹, Bin Luo², Dongyue Yang³, Longfei Yin³, Guohua Wu³, Hong Guo⁴

Affiliations

¹ State Key Laboratory of Advanced Optical Communication Systems and Networks, School of Electronics Engineering and Computer Science, and Center for Quantum Information Technology, Peking University, Beijing 100871, China.
² State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China.
³ School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China.
⁴ State Key Laboratory of Advanced Optical Communication Systems and Networks, School of Electronics Engineering and Computer Science, and Center for Quantum Information Technology, Peking University, Beijing 100871, China. Electronic address: hongguo@pku.edu.cn.

PMID: 36659444
DOI: 10.1016/j.scib.2017.04.008

Abstract

When using the image mutual information to assess the quality of reconstructed image in pseudo-thermal light ghost imaging, a negative exponential behavior with respect to the measurement number is observed. Based on information theory and a few simple and verifiable assumptions, semi-quantitative model of image mutual information under varying measurement numbers is established. It is the Gaussian characteristics of the bucket detector output probability distribution that leads to this negative exponential behavior. Designed experiments verify the model.

Keywords: Ghost imaging; Image mutual information; Image quality assessment; Information theory.