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. 2016 Sep 8;6:32504. doi: 10.1038/srep32504

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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) Starting interface on the app with a options menu. (b) Typical image of an apple surface captured by the smartphone magnifier (c) Photograph of the process of spectral data acquisition. (d) Interface for spectral acquisition with integration times and modes of operation (e) Typical ChlF for Golden Delicious apple sample.