A novel three-dimensional smile analysis based on dynamic evaluation of facial curve contour.
A novel three-dimensional smile analysis based on dynamic evaluation of facial curve contour.
复制标题
一种基于面部曲线轮廓动态评价的三维微笑分析方法
DOI：
10.1038/srep22103
复制
发表时间：
2016-02-25
影响因子：
4.6
通讯作者：
Xu Y
中科院分区：
文献类型：
--
作者：
Lin Y;Lin H;Lin Q;Zhang J;Zhu P;Lu Y;Zhao Z;Lv J;Lee MK;Xu Y
三维面部轮廓和动态评价解码对微笑美学因素的影响是提高面部美感的必要条件。然而，面部微笑轮廓的运动学特征以及软组织和底层骨骼的贡献尚不清楚。在这里，颧骨-上颌骨轮廓和鼻唇沟被合并成一个“微笑轮廓”，描绘了微笑时突出的整个面部地形。我们利用面部动作捕捉和曲线拟合的方法对微笑轮廓上的稳定点和不稳定点进行了筛选，然后分析了筛选点的软组织坐标和硬组织坐标之间的相关性。我们的研究结果表明，嘴角区域是表征微笑表情的最具流动性的区域，而其他区域保持相对稳定。因此，应动态评价口腔周围区域，而其他部分的静态评价结果有助于其动态美学。此外，与端片不同的是，颧区和鼻唇沟上部的形态在很大程度上是由静止的骨骼决定的，这意味着后者可以通过矫形或正畸矫正来改变，而前者可以通过美容手术来改善，以提高微笑的美感。
The influence of three-dimensional facial contour and dynamic evaluation decoding on factors of smile esthetics is essential for facial beauty improvement. However, the kinematic features of the facial smile contour and the contribution from the soft tissue and underlying skeleton are uncharted. Here, the cheekbone-maxilla contour and nasolabial fold were combined into a “smile contour” delineating the overall facial topography emerges prominently in smiling. We screened out the stable and unstable points on the smile contour using facial motion capture and curve fitting, before analyzing the correlation between soft tissue coordinates and hard tissue counterparts of the screened points. Our finding suggests that the mouth corner region was the most mobile area characterizing smile expression, while the other areas remained relatively stable. Therefore, the perioral area should be evaluated dynamically while the static assessment outcome of other parts of the smile contour contribute partially to their dynamic esthetics. Moreover, different from the end piece, morphologies of the zygomatic area and the superior part of the nasolabial crease were determined largely by the skeleton in rest, implying the latter can be altered by orthopedic or orthodontic correction and the former better improved by cosmetic procedures to improve the beauty of smile.