眼周皱纹三维形态的隐式曲面拟合构造方法

3D Shape Simulation of Eye Wrinkles Using Implicit Surface Fitting

真实感皱纹生成是三维表情模拟的关键问题之一.文中提出一种基于隐式曲面拟合的眼周皱纹三维建模方法.首先对眼周三维扫描数据预处理,生成用于提取皱纹形状特征的构造模型和用于嵌入三维皱纹的光顺模型;其次采用隐式曲面拟合方法在构造模型上提取曲率张量和曲率导数,连接特征点后得到连续的眼周皱纹特征线;最后构造皱纹特征线的三维等距区域,在等距区域内构造并嵌入皱纹三维网格,在等距区域外对光顺模型进一步简化.实验结果表明,与同类工作相比,该方法能够以较高的真实感模拟眼周皱纹的三维形态特征,皱纹定位健壮性和计算效率较高.

Realistic wrinkles are the key problem for3D expression.Based on implicit surface fitting,thispaper proposed a novel approach for generating realistic wrinkles around eyes.First,the3D scan dataaround eyes are preprocessed to generate structure model for extraction wrinkles shape features,andsmoothing model for3D wrinkles to embed in.Second,curvature tensor and curvature derivative are computedby implicit surface fitting,and the feature lines of wrinkles are connected by feature points;third,the3D equidistant space of wrinkles features lines is constructed,and the3D mesh of wrinkles is embed intosmoothing model within the region,and the smoothing model outside is simplified.Experiment results showthat,compared with similar works,our method is better in high reality,localization robustness and computationalefficiency.