Browsing by Person "Qin, Chao"
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Item Predicting Tongue Shapes from a Few Landmark Locations(2008-09) Qin, Chao; Carreira-Perpinan, Miguel A.; Richmond, Korin; Wrench, Alan A.; Renals, SteveWe present a method for predicting the midsagittal tongue contour from the locations of a few landmarks (metal pellets) on the tongue surface, as used in articulatory databases such as MOCHA and the Wisconsin XRDB. Our method learns a mapping using ground-truth tongue contours derived from ultrasound data and drastically improves over spline interpolation. We also determine the optimal locations of the landmarks, and the number of landmarks required to achieve a desired prediction error: 3-4 landmarks are enough to achieve 0.3-0.2 mm error per point on the tongue.