Main > Chinese Optics Letters >  Volume 18 >  Issue 7 >  Page 071101 > Article
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Accepted: Apr. 16, 2020

Posted: May. 22, 2020

Published Online: May. 25, 2020

The Author Email: Qing Zhao (qzhaoyuping@bit.edu.cn), Wenlin Gong (gongwl@siom.ac.cn)

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Zijie Li, Qing Zhao, Wenlin Gong. Performance comparison of ghost imaging versus conventional imaging in photon shot noise cases[J]. Chinese Optics Letters, 2020, 18(7): 071101

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## Abstract

The performances of ghost imaging and conventional imaging in photon shot noise cases are investigated. We define an imaging signal-to-noise ratio called SNRtran where only the object’s transmission region is used to evaluate the imaging quality and it can be applied to ghost imaging (GI) with any random pattern. Both the values $SNRGItran$ of GI and $SNRCItran$ of conventional imaging in photon shot noise cases are deduced from a simple statistical analysis. The analytical results, which are backed up by numerical simulations, demonstrate that the value $SNRGItran$ is related to the ratio between the object’s transmission area Ao and the number density of photons illuminating the object plane Io, which is similar to the theoretical results based on the first principle of GI with a Gaussian speckle field deduced by B. I. Erkmen and J. H. Shapiro [in Adv. Opt. Photonics 2, 405–450 (2010)]. In addition, we also show that the value $SNRCItran$ will be larger than $SNRGItran$ when Ao is beyond a threshold value.