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. 2017 Jan 9;7:40203. doi: 10.1038/srep40203

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Copyright © 2017, The Author(s)

This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

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(A) Representative luminescence image for 1/5 and 1/50 dilution sample for iphone 5 s. (B) Representative luminescence image for 1/10 and 1/100 dilution sample for OPO. Data were captured with and without lens (f = 25 mm, plano-convex) for comparison. Color scale bar is in logarithmic scale, and the best performance setup (diffusive chamber, lens, integration time of 60 seconds, 3 consecutive shots, and NREA algorithm) was used for data acquisition. (C) Estimated RLU/pixel for diluted bacterial samples for both phones. (D) SNR of the experimental data. Noise intensity was calculated by spatially filtering and averaging pixel intensity outside the signal area.