基于B样条线圈模型的段染纱针织物外观模拟  

Appearance simulation of section-dyed yarn knitted fabrics based on the B-spline coil model

作　　者：董福星 喻莉 顾学锋 赵连英[1,3] DONG Fuxing;YU Li;GU Xuefeng;ZHAO Lianying(College of Textile Science and Engineering,Zhejiang Sci-Tech University,Hangzhou 310018,China;Ningbo Mafei Sheep Textile Technology Co.,Ltd.,Ningbo 315600,China;Zhejiang Sci-Tech University Xiangshan Knitting Research Institute,Ningbo 315600,China)

机构地区：[1]浙江理工大学纺织科学与工程学院,杭州310018 [2]宁波马菲羊纺织科技有限公司,宁波315600 [3]浙江理工大学象山针织研究院有限公司,宁波315600

出　　处：《现代纺织技术》2024年第7期66-73,共8页Advanced Textile Technology

摘　　要：针对段染纱针织物花纹预测困难且现有织物模拟方法真实感有待提升的问题,提出了一种基于真实段染纱的针织物外观模拟方法。首先,使用图像处理技术对获取的段染纱图像进行阈值分割和形态学处理等预处理,从原始图像中提取纱线主体区域。然后,从真实织物中提取线圈点位信息,借助最小二乘拟合构建B样条线圈曲线,并根据曲线将段染纱真实图像映射为线圈图像。最后,在考虑线圈交织覆盖关系以及光照因素后,通过排列线圈实现纬平针针织物及其系列针织面料的外观模拟。结果表明:所模拟的线圈模型能够还原真实线圈中的纱线走向,且模拟织物外观花纹效果与实物一致,整体呈现出较好的真实感。The section-dyed yarn,characterized by unique colors and textures,is widely utilized in the field of fashion textiles.Fabrics made from section-dyed yarns are highly favored for their vibrant and diverse color appearances.To address the randomness and energy consumption issues during the production and sampling process of section-dyed yarns,as well as the low fidelity in simulating fabric authenticity,this paper proposed a simulation method for section-dyed yarn knitted fabrics based on the B-spline coil model.Initially,in order to extract the main surface texture information of the yarn from the original images,image processing techniques,including threshold segmentation Otsu algorithm and morphological open and close operations,were applied to preprocess the collected section-dyed yarn images.Subsequently,to map the extracted main yarn texture into coil shapes,data points were extracted along the course of the knitting loops from the real fabric image.Afterwards,the B-spline coil curve was constructed by using the least square fitting technique.During the mapping process based on these curves,appropriate pixel offsets were needed according to the B-spline normals to achieve the curved effect.The collected yarn texture was linear,resulting in blank pixels at curved sections of the knitted loop after mapping,so nearest-neighbor interpolation was employed to fill these gaps and ensure the integrity of the mapped coils.Ultimately,a method of arranging coil images horizontally and vertically was used to simulate the fabric.The paper viewed fabric weaving as a process in which coil images increased from left to right and from bottom to top,with a start from the lower-left corner.To establish the interlocking relationship between coils,a Boolean matrix was utilized to eliminate pixel overlap positions in intertwined coils based on the simulated fabric organization.Under certain lighting conditions,different positions of the coils exhibited varying brightness effects on the fabric surface.To enhance the realism of the

关 键 词：织物模拟 段染纱 最小二乘拟合 B样条曲线 线圈映射 

分 类 号：TS186.2[轻工技术与工程—纺织材料与纺织品设计]