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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
RGB visualization of a reflectance test image to show the line pattern. The highlighted image part in (A) is visualized in zoom view in (B). On the white reference the line pattern is visible, whereas on the plants it is mainly covered by natural variability.