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. 2017 Apr 3;8:447. doi: 10.3389/fpls.2017.00447

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Copyright © 2017 Lobet, Koevoets, Noll, Meyer, Tocquin, Pagès and Périlleux.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Error estimation for three ground-truth parameters. (A) Evolution of the overlap index (proportion of root overlapping) with the root system size. (B–D) Left panel shows the relationship between the descriptors and the corresponding ground-truth variables. Right panels show the evolution of the Mean Relative Error (MRE) as a function of the overlap index. For the MRE calculations, the continuous variables were discretized in groups. (B) Number of lateral roots. (C) Total root length. (D) Root system depth. In the left panels, the gray line indicates the diagonal (1:1 relation).