基于B/S架构的数字人台变形NURBS曲面模型

doi:10.13475/j.fzxb.20200100107

纺织学报 ›› 2020, Vol. 41 ›› Issue (10): 137-143.doi: 10.13475/j.fzxb.20200100107

基于B/S架构的数字人台变形NURBS曲面模型

刘芸, 修毅()

北京服装学院计算机信息中心, 北京 100029

收稿日期:2020-01-02 修回日期:2020-07-12 出版日期:2020-10-15 发布日期:2020-10-27
通讯作者: 修毅
作者简介:刘芸(1992—),女,硕士生。主要研究方向为三维曲面造型及可视化与计算机图形技术。
基金资助:
北京市教育委员会科技计划一般项目(KM20190012001)

NURBS surface model of digital mannequin based on B/S architecture

LIU Yun, XIU Yi()

Computer Information Center, Beijing Institute of Fashion Technology, Beijing 100029, China

Received:2020-01-02 Revised:2020-07-12 Online:2020-10-15 Published:2020-10-27
Contact: XIU Yi

摘要/Abstract

摘要：

针对在浏览器/服务器结构(B/S架构)中模型数据量过大导致Web加载速度过慢、模型变形时失真的情况,提出一种基于B/S架构的参数化人台变形NURBS曲面模型。首先,通过手工与三维扫描工具结合的方式提取标记点模型特征信息,获得其特征语义结构缩小模型数据量;其次,搭建B/S架构,通过JSON树状结构,实现数据从服务器端到客户端的加载和渲染,并采用角度加权平均、相似三角形等方法实现人台模型的参数化变形;最后,依据NURBS曲面原理,利用高密度点复用原则对变形区域控制点进行补点操作,构建一个光滑的人台变形曲面模型。结果表明,该方法利用人体特征大量缩减模型数据形成精简人体特征数据模型和结构,在B/S架构中流畅加载并实现高质量的人台变形NURBS曲面模型。

关键词: Web3D技术, 三维人台变形, 三维扫描测量法, NURBS曲面, 人台特征点

Abstract:

Aiming at slow web loading and model distortion caused by the excessive size of data in the Web/server(B/S) architecture, a parametric NURBS surface model based on the B/S architecture was developed. The feature information of the point model was manually extracted by using a 3-D scanning tool to obtain its feature semantic structure and reduce the amount of model data, and then a B/S architecture was built to transfer the data from the server to the client through the JSON tree structure. Angle-weighted average, similar triangles and other methods were used to achieve parametric deformation of the mannequin. According to the principle of NURBS surface, the high-density points were employed to supplement the control points in the deformation area to construct a smooth human platform deformation surface. This method reduces human body data to form a simplified set of data to facilitate smooth data loading for creating a high-quality NURBS surface based on the B/S architecture.

Key words: Web3D technology, 3-D platform deformation, 3-D scanning measurement, NURBS surface, feature point mark of mannequin

中图分类号:

TP391.72

刘芸, 修毅. 基于B/S架构的数字人台变形NURBS曲面模型[J]. 纺织学报, 2020, 41(10): 137-143.

LIU Yun, XIU Yi. NURBS surface model of digital mannequin based on B/S architecture[J]. Journal of Textile Research, 2020, 41(10): 137-143.

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围度	围度定义	特征点	特征点定义
胸上围	又名腋窝水平线通过腋窝点的水平线	胸上围前中心点	前中线与胸上围线的交点
		胸上围后中心点	后中线与胸上围线的交点
		胸上围体侧点	侧缝线与胸上围线的交点
胸围	通过乳点的水平线	胸高点	胸围线上最凸出的点
		胸围前中心点	前中线与胸围线的交点
		胸围后中心点	后中线与胸围线的交点
		胸围体侧点	侧缝线与胸围线的交点
胸下围	又名乳下围,乳房下缘的水平线	胸下围前中心点	前中线与胸下线的交点
		胸下围后中心点	后中线与胸下线的交点
		胸下围体侧点	侧缝线与胸下线的交点

基于B/S架构的数字人台变形NURBS曲面模型

NURBS surface model of digital mannequin based on B/S architecture

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