基于三角网格模型的局部纹理映射  

REGIONAL TEXTURE MAPPING BASED ON TRIANGULAR MESH MODEL

作　　者：姚砺[1] 钱朔[1] 

机构地区：[1]东华大学计算机科学与技术学院,上海201620

出　　处：《计算机应用与软件》2015年第3期205-208,223,共5页Computer Applications and Software

基　　金：国家自然科学基金项目(81372057)

摘　　要：局部纹理映射可以增添三维模型的局部细节,加强模型的真实感。为了实现对三维模型的局部特征描写,增强局部纹理映射的用户可交互性,提出一种基于区域增长和平面投影的方法来实现三角网格模型的局部纹理映射。区域增长是以指定的三角面片为初始种子面片,搜索与种子面片共顶点的增长规则扩散出待映射区域。算法不仅保证了选取区域的完整性,不会出现缺角的情况;同时用户可以改变待映射区域的位置和大小。采用平面投影法对待映射区域进行纹理映射,将三维顶点投影到基准平面上,建立二维坐标系与纹理坐标系的关系,从而确定三维顶点和纹理坐标的对应关系。算法成功应用于实验,表明该方法的可行性。Regional texture mapping can describe the local details of 3D model and strengthen model＇s reality. In order to realise the description of local features of 3D model and strengthen users interaction in regard to regional texture mapping,we propose a region growing and plane projection based method to implement regional texture mapping on triangular mesh model. Region growing is to take the specified triangular facet as the initial seed facet to select the growing rule having same vertex with seed facet＇s to proliferate the areas to be mapped.The algorithm ensures the integrity of the selecting area and will not cause the corner-missing situation. At the same time,users can change the location and size of the area to be mapped. By using plane projection method to project texture in area to be mapped and projecting the 3D vertices onto reference plane,we can create the relationship between the two-dimension coordinates system and the texture coordinates system,so that determine the corresponding relation between 3D vertex and texture coordinate. The algorithm has been successfully applied in experiments,it proves the feasibility of the method.

关 键 词：局部纹理映射 三角网格模型 区域增长 纹理坐标 平面投影 

分 类 号：TP399.1[自动化与计算机技术—计算机应用技术]