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. 2016 Mar 30;16(4):453. doi: 10.3390/s16040453

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© 2016 by the authors; licensee MDPI, Basel, Switzerland.

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

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Comparisons of created background images with database I. The left-upper, right-upper, left-lower and right-lower figures are by [24,27,28,29,30,31,33,34,35] and the proposed method, respectively.