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. 2015 Jul 8;15(7):16484–16502. doi: 10.3390/s150716484

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© 2015 by the authors; licensee MDPI, Basel, Switzerland

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/).

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Mean of the height estimate for three pairs of IR LEDs (see Equation (18)) while the position of the HyperCube sensor is fixed. Note that the height estimation is more accurate at 300 mm, since this was the height of calibration.