现代纺织技术2025，Vol.33Issue(4)：83-90,8.DOI:10.19398/j.att.202408015
基于分段拟合映射的女性腰腹臀部三维模型构建
Construction of a 3D model of female waist,abdomen and hip based on piecewise fitting mapping
摘要
Abstract
In constructing 3D models of female body based on 2D photos,the complexity and diversity of the waist-abdomen-hip region should be taken into account,which is important for the accuracy of a reconstructed 3D model.Therefore,a piecewise fitting mapping model construction method is proposed in this paper to improve the accuracy of the mapping model between 2D contour features and 3D feature indexes.In this paper,3D point cloud data of 120 young women aged 18-25 years were collected,and 15-layer feature sections and radial distance were extracted as 3D feature parameters.At the same time,six contour feature parameters were extracted from the front and side photos of human body.On the basis of correlation analysis,a piecewise mapping model was established to realize the mapping from 2D contour feature to 3D feature index.Then,trigonometric function was used to convert radial distance into discrete point cloud data.Finally,the idea of point-line-plane modeling was introduced to build the 3D model of waist,abdomen and hip. In this paper,the model reconstruction error was used as the evaluation criterion to determine the optimal configuration of the layer number of feature section.When the number of feature layers was 15,the reconstruction error was not only reduced to 6.45 mm,but also the balance between the model complexity and the error value was achieved.In view of the diversity and complexity of female waist,abdomen and hip,this paper analyzed the correlation between the radial distance and the corresponding width and thickness,aiming to further improve the accuracy of the prediction model.In order to enhance the correlation of some feature points,the method of piecewise mapping was adopted in this paper,and the correlation coefficient of more than half of the samples was raised to the level of more than 0.85.On this basis,100 samples were randomly selected as training sets,and a regression mapping model with width and thickness as independent variables and radial distance as dependent variables was constructed.To verify the prediction accuracy of the model,the remaining 20 samples were used as test sets for verification.The results show that the error of the mapping model is controlled within-1.5-2.5 mm.Further,this paper used trigonometric function to carry out point cloud processing of radial distance set,and followed the idea of point-line-plane modeling to realize the reconstruction of female waist-abdomen-hip 3D model.By comparing the reconstructed model with the actual model,it is found that the maximum error percentage of the proposed method is limited to less than 3%. The 3D human body modeling method based on 2D photo feature point mapping is particularly effective for complex female body types,and its core lies in the accurate positioning and mapping of feature points to build high-precision 3D models.The piecewise fitting technique further optimizes this process and significantly improves the correlation between 2D profile and 3D section parameters.Segmented mapping can refine the modeling for different parts of the body and improve the reconstruction accuracy.关键词
腰腹臀部/二维照片轮廓特征/三维截面特征/映射模型/点-线-面建模Key words
waist-abdomen-hip/2D photo contour features/3D section feature/mapping model/point-line-plane modeling分类
轻工纺织引用本文复制引用
林熹妍,姜丽霞,张倩云,李涛,邹奉元..基于分段拟合映射的女性腰腹臀部三维模型构建[J].现代纺织技术,2025,33(4):83-90,8.基金项目
浙江理工大学科研启动基金项目(23072078-Y) （23072078-Y）
国家级大学生创新创业训练计划项目(202410338063) （202410338063）
