基于二次误差测度的超声点云数据简化算法  

Mesh simplification algorithm of ultrasonic point cloud based on quadric error metrics

作　　者：李彦军 剡昌锋[1] 王文斌 常斌全 LI Yan-jun;YAN Chang-feng;WANG Wen-bin;CHANG Bin-quan(School of Mechanical and Electrical Engineering,Lanzhou University of Technology,Lanzhou 730050,China;Gansu Tongcheng Construction Limited Company,Baiyin 730900,China)

机构地区：[1]兰州理工大学机电工程学院,甘肃兰州730050 [2]甘肃铜城工程建设有限公司,甘肃白银730900

出　　处：《计算机工程与设计》2018年第9期2787-2791,共5页Computer Engineering and Design

基　　金："高档数控机床与基础制造装备"科技重大专项基金项目(2014ZX04012015)

摘　　要：为使Qslim算法在处理超声点云数据网格模型时能够自适应于非空间测度量的简化要求,提出一种网格模型简化算法。基于超声点云数据中包含强度信息的特点,将强度信息测度经过归一化处理后嵌入到二次误差测度矩阵中,根据简化阈值重新分配强度信息测度和二次误差测度矩阵对收缩代价的影响比重。实验结果表明,优化后算法使得简化结果能够自适应于反射强度值,实现了Qslim算法在超声成像领域的应用目的。A mesh model simplification algorithm was proposed for realizing the simplification requirement of Qslim algorithm in dealing with the mesh model of ultrasonic point cloud data.Based on the characteristics of ultrasonic intensity information contained in the point cloud data,the measure of intensity information after normalization was embedded into QEM,and according to the simplified threshold,the proportion of intensity information measure and QEM with an effect on the cost of contraction target was assigned.Experimental results show that the optimized algorithm can make the simplified results self-adaptive to intensity information,realizing the application of Qslim algorithm in the field of ultrasonography.

关 键 词：超声数据 网格简化 二次误差测度矩阵 自适应 强度信息测度 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]