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. 2019 Feb 20;15:18. doi: 10.1186/s13007-019-0401-4

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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 — Illustration of the error assessment in affine registration of PAM images. $P_{i}, i = 1, \dots, N$ —control point in the fixed image $I_{F}$ , $Q_{i}$ —mapping of the control point $P_{i}$ in the moving image $I_{M}$ , $R_{i}$ —mapping of the control point $P_{i}$ after registration, $R_{i} P_{i} = Δ r_{i}$ —displacement error of the control point $P_{i}$ after registration