一种三维人头生成方法在Second Life中的应用

A Method of Generating 3D Human Head and Its Application in Second Life

在网络游戏和虚拟环境中构造具有真实感的三维人脸模型成为一个重要的研究课题。如何将特定环境中默认的三维人头模型变换到通过照片三维重建后得到的三维人头模型,是一个难点。所以提出一种粗细变换相结合的方法生成具有个性特征的人头模型。运用迭代最近点算法将两个模型进行对齐粗变换,再通过薄板样条函数与确定性退火技术将两个拓扑结构不同的人头模型进行细变换。最后应用到Second Life虚拟环境中。结果表明,方法能够产生与照片相似且能够在Sec-ond Life环境中进行载入及逼真显示的人头模型。证明方法可以用于两个不同拓扑结构人头模型之间的转换,具有良好的通用性。

Construction of realistic human facial models in computer game and virtual environment is an important research field.How to transfer a default 3D human head model into a special 3D model with 3D recognition is still a challenge.Therefore,a method combining the rough transformation with refined transformation to construct an individualized human head is presented.Firstly,this paper studies the methods of rough transformation with ICP（Iterative Closest Point） algorithm between the model of second life and the correspondence of the 3D models with 3D recognition.Secondly,the TPS（the thin-plate splines） and deterministic annealing algorithm can be used in the methods of refined transformation.Lastly,this method is applied to Second Life.The results show that the method can generate the special 3D facial model which is similar with facial image and can be loaded in the virtual environment.The method can be used in transformation of two different topology 3D head models,so it has good universal property.