【作者】 孙文军；

【导师】 金小刚；

【作者基本信息】 浙江大学 ， 计算机应用技术， 2008， 硕士

【摘要】 由于人是诸多活动的主体,三维人脸模型的应用领域非常广泛,包括虚拟现实、游戏、人机交互以及影视广告等。在某些注重实时性的应用场合,如游戏中,三维头部模型一般较为粗糙,计算代价较少。而在另一些场合,如影视广告及部分数字娱乐应用中,则需要更为精细的三维模型,且外观要求较高。以往美化处理大多数以人脸图像为对象,其使用的是一种统计方法。首先搜集大众认可的极具魅力的人脸图片,建立起一个人脸图像数据库,再对输入图像分析,借助预先建立的数据库来进行美化处理。本文提出一种人脸三维模型美化方法,该方法主要针对模型的几何进行美化。几何美化是指人脸模型变换,文中借鉴整容领域的完美脸型标准,对给定模型进行分析,如五官比例及其形状等,根据分析结果对给定模型变形过程进行指导,以达到形状美化的结果;模型变换使用的是基于微分坐标的网格编辑方法,该方法达到求解实时的同时,又能做到很好的细节保留。文章主要贡献在于将整容美容的标准引入到图形学中,结合网格编辑技术及纹理技术进行模型的美化处理。实验结果表明,该方法在保留给定模型大体模样的基础上,取得了良好的美化效果。更多还原

【Abstract】 3D face models are widely used in many fields, such as virtual reality, computer game, man-machine interaction, film and television, and advertisement, etc. For the applications such as computer games which require real time rendering, the face models are usually coarse in order to reduce the computational cost. For the applications like films, advertisements, realistic and accurate face models are necessary.Previous face beautification work focuses on face images. They use the statistical method to construct a database of various attractive face images, and perform the beautification with the help of the database. In this thesis, we present a beautification method for 3D face models. Our work focuses on the geometry instead of the image. Geometry beautification means the deformation of the 3D face model. We adopt the standard of a perfect face in the plastic surgery to instruct the deformation process. We use the differential coordinates-based method mesh editing tool to perform the deformation, because of its detail preserving property. Our experiments show that our approach can achieve good beautification effects while resembling to the original face model.更多还原