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. 2019 Mar 15;10(4):1856–1869. doi: 10.1364/BOE.10.001856

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Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

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Fig. 4 — Schematic of processing methodology used to analyse data and produce final images. (a) How wavelength dependent propagation of light through different cores is accounted for through normalisation of the data with a brightfield image. (b) How spectral ratio values are calculated following a core matching protocol and interpolation.