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. 2015 Oct 21;15(10):26756–26768. doi: 10.3390/s151026756

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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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Simulation results of estimating facial nerve palsy among various head pose. (a) Examples of projected 2D synthetic face with various head-orientations; (b) Simulation results of facial nerve palsy estimation by using best features (forehead_region, mouth_axis) and LDA. The blue color represents the correct estimation, and the red color represents wrong estimation. The results of roll movements are not showed in this figure because there was no change in the asymmetry index within the roll angle from −30° to 30°.