数字人体模型中腰部剖面曲线参数化变形算法

Deformation algorithm of waist cross-section contour in digital mannequin model

针对基于特征的参数化人体造型方法在变形精度和个性化表现方面存在的问题,在深入分析人体部位造型和变化特点的基础上,提出一种新型的参数化人体造型和变形算法。首先,利用水平剖面横切获取人体模型的特征腰围围线,并引入人体特征尺寸参量,确定腰围围线上正面、背面和侧面的3个迭代初始轴和初始值;然后,利用角度加权平均计算出围线上各点的坐标,通过不断迭代实现腰围围线的变形;最后,在指定变形区内,根据其他相关围线的高度和腰围围线初始值,确定这些围线的迭代初始值,实现指定区域的其他围线变形,完成该区域的整体变形。研究结果表明,该数字化人体模型可依据指定特征尺寸,变形得到个性化人体模型。

Aiming at the problems of the feature-based parameter human modeling method on deformation precision and personalization representation,based on the analysis of the characteristics of the human body part modeling and deformation,this paper proposes a novel parameterization human modeling and deformation algorithm.At first the characteristic waist contour of the mannequin model is obtained by the cross cutting of the horizontal cross sections,then the characteristic dimension parameters of human body are introduced and 3 iteration initial axles and initial values on the front,back and lateral faces on the waist contour are determined; then the point coordinates of the waist contour are calculated by applying the weighted average of the included angles,and the deformation of the waist contour is realized.Finally,the iteration initial values of the contours are acquired in the specified deformation area according to the heights of other contours and the initial values of the waist contour,and the deformation of other contours in the specified deformation area is realized to complete the whole deformation of the area.A personalized human body model is obtained from the digital mannequin model by deforming based on the specified characteristic values.