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. 2019 Mar 11;9:4105. doi: 10.1038/s41598-019-40798-x

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© The Author(s) 2019

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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A comparison of image reconstruction schemes. (a) A standard computational ghost imaging system uses a single-pixel detector and takes 4096 acquisitions to yield a 64 × 64 image with a low SNR. (b) A few-pixel imaging system uses a quadrant detector and takes 1024 acquisitions to yield a 64 × 64 image with a low SNR. (c) The proposed imaging system uses a quadrant detector and takes 256 acquisitions to yield a 32 × 32 image with a high SNR, then with four sequentially obtained 32 × 32 images, a 64 × 64 image can be reconstructed.