基于改进质点-弹簧模型的图像变形仿真方法  

Simulation of image deformation using improved mass-spring model

作　　者：袁志勇[1] 尹乾[2] 胡君[1] 冯仕堃[1] 

机构地区：[1]武汉大学计算机学院,湖北武汉430079 [2]北京师范大学信息科学与技术学院,北京100875

出　　处：《华中科技大学学报（自然科学版）》2009年第1期35-37,共3页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家重点基础研究发展计划资助项目(2006cb504804);国家自然科学基金资助项目(79970025,60703070)

摘　　要：为了满足仿真系统中对仿真的实时性和视觉效果上的真实性要求,提出了一种改进的质点-弹簧模型,采用传统的质点-弹簧模型与虚拟弹簧共同表征图像的表面,利用Verlet数值积分更新图像变形期间的质点位置,使用双线性插值技术实时绘制出动态变形的效果.在OpenGL环境下对改进的3D质点-弹簧模型进行了仿真实验,实验结果表明所提模型能逼真地模拟出图像变形的效果.Image deformation is a key component in a virtual reality （VR） based visual simulation system. An improved mass-spring model is proposed. The surface was represented by virtual springs and conventional mass-spring model. Verlet integration was adopted to calculate the position of mass points during deformation without explicit computation of their velocities. A bilinear interpolation method was employed to generate a smooth mesh to render the deformed surface. The proposed method was implemented using OpenGL which generated realistic deformation images in real-time.

关 键 词：虚拟现实 图像变形 视觉仿真 质点-弹簧模型 绘制 

分 类 号：TP317.4[自动化与计算机技术—计算机软件与理论]