面向移动有损网络的基于预测重构模型传输机制  

An Effective Transmission Mechanism for 3D Model Based on Predictive Reconstruction Method over Unreliable Wireless Network

作　　者：杨柏林[1] 章志勇[1] 王勋[1] 潘志庚[2] 

机构地区：[1]浙江工商大学计算机与信息工程学院,杭州310018 [2]浙江大学CAD&CG国家重点实验室,杭州310027

出　　处：《计算机辅助设计与图形学学报》2010年第1期37-43,共7页Journal of Computer-Aided Design & Computer Graphics

基　　金：浙江省自然科学基金(Y1080230);国家自然科学基金(60873218);教育部博士点基金(20060335111)

摘　　要：为解决3D模型在移动有损网络传输时由于丢包所带来的视觉影响,从客户端错误恢复角度出发,提出一种面向移动有损网络的彩色纹理化渐进模型预测重构传输机制.首先进行模型分组打包,提出一种改进的混合传输方法,使用可靠协议传输模型基网格与模型细节中连接信息,并采用不可靠协议传输其他细节信息,以实现报文快速鲁棒传输;然后提出一种预测重构方法对丢失模型数据进行快速恢复,该方法由快速预测和渐进细化2个阶段组成,实现了对模型丢失部分的顶点几何、颜色、法向和纹理坐标信息的有效重构.实验结果表明,采用文中提出的传输机制能够使客户端在获得较好的模型视觉效果同时,缩减网络总体传输时间.In order to resolve the adverse visual effects brought by the lost packets over lossy wireless network,this paper mainly proposes a transmission mechanism for textured progressive model based on predictive reconstruction method.Firstly,an improved hybrid transmission technique for message packets is presented to send model information rapidly and robustly after packetization of model.Typical,the base model and all the connectivity information of the model will be transmitted by reliable protocol and the rest will be sent by unreliable protocol.Then,predictive reconstruction method is developed to help a 3D model render in a desired visual quality even if some model information is lost.In particular,the method consists of rapid prediction and progressive refinement,which can quickly reconstruct the geometry,color,normal and texture coordinate information for the lost vertices of model.Experimental results show that the proposed transmission enables the clients achieve good model visual quality with less transmission time.

关 键 词：预测重构 移动网络 模型传输 

分 类 号：TP391.72[自动化与计算机技术—计算机应用技术]