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. 2019 May 14;18:56. doi: 10.1186/s12938-019-0681-y

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© The Author(s) 2019

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided 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 Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 6 — A schema of squares analysis: 1—a camera; 2—analyzed square; a a square placed in a container for further AAA models analysis; b spatial locations of the analyzed square, considering different distances between the square and camera lens: 0.30, 0.35, and 0.40 m; c the investigated sequences of two image squares: first sequence representing small and big square image, second sequence containing the same images acquired in the opposite order; (S: small square: 0.05 × 0.05 m and B: big square: 0.10 × 0.10 m)