基于测地距离三维模型瑕疵外观模拟  

Simulation of Blemishes Appearance of Three-dimensional Models Based on Geodesic Distance

作　　者：郭迪[1,2] 周明全[1,2] 王学松[1,2] 税午阳[1,2] 樊亚春[1,2] 

机构地区：[1]北京师范大学信息科学与技术学院,北京100875 [2]教育部虚拟现实应用工程中心,北京100875

出　　处：《系统仿真学报》2014年第9期1984-1987,1996,共5页Journal of System Simulation

基　　金：国家自然科学基金(61170203;61001168);国家科技支撑计划(2012BAH33F04);中央高校基本科研业务费专项资金资助(2013YB67)

摘　　要：三维模型外观瑕疵模拟一直是真实感绘制中的热点问题。为了增强自然环境下场景的真实感,提出了一种模拟三维模型外观瑕疵的方法。根据三维模型的用途,使用环境,以及自身几何信息选择一个或多个瑕疵源;计算每一个瑕疵源到模型表面上其他顶点的距离。将测地距离作为扩散因子,根据模型的材质信息和环境信息确定阈值,以决定瑕疵的扩散区域和范围;叠加多个瑕疵源的共同作用,根据阈值绘制最终存在瑕疵的模型外观。将方法应用到多个三维模型进行实验,结果表明方法对于模拟存在瑕疵的三维模型外观简单、可行,并且具有很强的真实感。3D model blemishes simulation has always been a hot issue in the research of photorealistic rendering. In order to enhance the scene of reality in natural environment, a method to simulate the appearances of the 3D models with blemishes was proposed. One or more blemishes source points was selected based on how to use three-dimensional models, and where to use them, as well as their geometry information; the distance from each blemishes source to other vertexes on the model surface was calculated. Making the geodesic distance as diffusion factor, a threshold was determined to a threshold based on the material and using environmental of three-dimensional models to obtain defects region. Multiple blemishes sources ＇influence was made up and the flawed appearance of the models was rendered based on the threshold. The method has been applied to has been applied more 3D models, which is more practical, simpler and has a stronger sense of reality.

关 键 词：真实感绘制 三维模型外观 测地距离 瑕疵 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]