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3-Dimensional Body Measurement Technology
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作者 周旭东 李艳梅 《Journal of Donghua University(English Edition)》 EI CAS 2002年第4期138-140,共3页
3 - dimensional body measurement technology, the basis of developing high technology in industry, accelerates digital development of aplparel industry. This paper briefly introduces the history of 3 - dimensional body... 3 - dimensional body measurement technology, the basis of developing high technology in industry, accelerates digital development of aplparel industry. This paper briefly introduces the history of 3 - dimensional body measurement technology, and recounts the principle and primary structure of some types of 3 - dimensional automatic body measurement system. With this understanding, it discusses prospect of 3- dimensional CAD and virtual technology used in apparel industry. 展开更多
关键词 3 - DIMENSIONAL BODY measurement technology digital apparel industry quick response virtual fitting apparel NAD
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A Theoretical Analysis of the Acceleration and the Angular Momentum of the Universe
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作者 Ardeshir Irani 《Journal of High Energy Physics, Gravitation and Cosmology》 CAS 2024年第1期101-105,共5页
The loss of Baryonic Matter through Black Holes from our spatial 3-D Universe into its 4th dimension as Dark Matter, is used along with the Conservation of Angular Momentum Principle to prove theoretically the acceler... The loss of Baryonic Matter through Black Holes from our spatial 3-D Universe into its 4th dimension as Dark Matter, is used along with the Conservation of Angular Momentum Principle to prove theoretically the accelerated expansion of the 3-D Universe, as has already been confirmed experimentally being awarded the 2011 Nobel Prize in Physics. Theoretical calculations can estimate further to indicate the true nature of the acceleration;that the outward acceleration is due to the rotation of the Universe caused by Dark Energy from the Void, that the acceleration is non-linear, initially increasing from zero for the short period of about a Million years at a constant rate, and then leveling off non-linearly over extended time before the outward acceleration begins to decrease in a non-linear fashion until it is matched by the gravitational attraction of the matter content of 4D Space and the virtual matter in 3-D Vacuum Space. m = m(4D) + m(Virtual). The rotation of our 3D Universe will become constant once all 3D matter has entered 4D space. As the 3-D Universe tries to expand further it will be pulled inward by its gravitational attraction and will then keep on oscillating about a final radius r<sub>f</sub> while it also keeps on oscillating at right angles to the radius r<sub>f</sub> around final angular velocity ω<sub>f</sub>, until it becomes part of the 4-D Universe. The constant value of the Angular Momentum of our Universe is L = . 展开更多
关键词 3-d Baryonic Matter 3-d virtual Matter 4-d Dark Matter Non-Linear Acceleration Final Radius Final Angular Velocity Conservation of Angular Momentum Principle
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Virtual Temporal Bone Anatomy
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作者 XIA Yin, LI Xi-ping, HAN De-min, Department of Otorhinolaryngology, Beijing Tongren Hospital, Capital Medical University, Beijing, China, 100730 ZHOU Guo-hong, ZHAO Yuan-yuan Biomedical Academy of Capital Medical University 《Journal of Otology》 2007年第1期56-59,共4页
Background The Visible Human Project(VHP) initiated by the U.S. National Library of Medicine has drawn much attention and interests from around the world. The Visible Chinese Human(VCH) project has started in China. T... Background The Visible Human Project(VHP) initiated by the U.S. National Library of Medicine has drawn much attention and interests from around the world. The Visible Chinese Human(VCH) project has started in China. The current study aims at acquiring a feasible virtual methodology for reconstructing the temporal bone of the Chinese population, which may provide an accurate 3-D model of important temporal bone structures that can be used in teaching and patient care for medical scientists and clinicians. Methods A series of sectional images of the temporal bone were generated from section slices of a female cadaver head. On each sectional image, SOIs (structures of interest) were segmented by carefully defining their contours and filling their areas with certain gray scale values. The processed volume data were then inducted into the 3D Slicer software(developed by the Surgical Planning Lab at Brigham and Women’s Hospital and the MIT AI Lab) for resegmentation and generation of a set of tagged images of the SOIs. 3D surface models of SOIs were then reconstructed from these images. Results The temporal bone and structures in the temporal bone, including the tympanic cavity, mastoid cells, sigmoid sinus and internal carotid artery, were successfully reconstructed. The orientation of and spatial relationship among these structures were easily visualized in the reconstructed surface models. Conclusion The 3D Slicer software can be used for 3- dimensional visualization of anatomic structures in the temporal bone, which will greatly facilitate the advance of knowledge and techniques critical for studying and treating disorders involving the temporal bone. 展开更多
关键词 3-d reconstruction temporal bone Chinese virtual Human
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虚拟服装迁移在个性化服装定制中的应用 被引量:6
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作者 叶勤文 王朝晖 +2 位作者 黄荣 刘欢欢 万思邦 《纺织学报》 EI CAS CSCD 北大核心 2023年第6期183-190,共8页
为解决服装定制中个性化服装开发效率低以及虚拟试衣过程繁琐等问题,首先,详细阐明了三维服装软件CLO 3D和Marvelous Designer的虚拟服装迁移原理;其次,结合CLO 3D的虚拟服装迁移和自动转换虚拟模特功能,提出了一套针对三维扫描人体的... 为解决服装定制中个性化服装开发效率低以及虚拟试衣过程繁琐等问题,首先,详细阐明了三维服装软件CLO 3D和Marvelous Designer的虚拟服装迁移原理;其次,结合CLO 3D的虚拟服装迁移和自动转换虚拟模特功能,提出了一套针对三维扫描人体的个性化服装定制方案;最后,采用三维扫描人体开展虚拟服装迁移实验,验证了该方案在实际个性化服装定制应用中的可行性。研究结果表明:针对不同体型的三维扫描人体,可快速生成个性化虚拟服装、个性化样板和展示个性化虚拟试衣效果;生成的虚拟服装能够满足不同体型的个性化需求。该方法可提高个性化虚拟服装开发效率,为个性化服装定制提供技术支持。 展开更多
关键词 虚拟服装 虚拟服装迁移 三维扫描人体 数字化模特 虚拟试衣 服装定制
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基于合体两片袖的内旋造型结构设计 被引量:1
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作者 鲁虹 宋佳怡 +1 位作者 李圆圆 滕峻峰 《纺织学报》 EI CAS CSCD 北大核心 2022年第8期140-146,共7页
为探究袖身内旋造型的形成机制及影响因素,增强合体两片袖的活动性和机能性,从立裁角度提出分割线借量法、袖中线偏移法与袖中线旋转法3种结构设计方法。借助三维虚拟试衣技术进行单变量试验设计,确定每种方法中各变量的取值范围;通过... 为探究袖身内旋造型的形成机制及影响因素,增强合体两片袖的活动性和机能性,从立裁角度提出分割线借量法、袖中线偏移法与袖中线旋转法3种结构设计方法。借助三维虚拟试衣技术进行单变量试验设计,确定每种方法中各变量的取值范围;通过正交试验设计,完成16款袖子的结构设计、虚拟试衣及实样制作;最后建立评价体系,进行主客观评价与分析。结果表明:各变量对内旋夹角影响程度的大小依次为袖中线旋转量、分割线借量、袖中线偏移量;结合动静态指标、主客观评价数据,得到的美观与舒适俱佳的袖子变量组合为分割线借量0.5 cm,袖中线偏移量2 cm,袖中线旋转量1 cm。 展开更多
关键词 合体两片袖 内旋造型 结构设计 内旋夹角 三维虚拟试衣 立裁
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基于图像的人体颈肩部三维模型构建 被引量:7
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作者 王婷 顾冰菲 《纺织学报》 EI CAS CSCD 北大核心 2021年第1期125-132,共8页
为实现个性化服装在线设计和虚拟试衣,提出一种基于人体正侧面照片的尺寸测量及建模方法。首先结合202名青年女性的三维点云数据确定与人体颈肩部形态相关的8个特征截面层,以各截面层中心点为基准点每隔10°测量角度半径并分析其与... 为实现个性化服装在线设计和虚拟试衣,提出一种基于人体正侧面照片的尺寸测量及建模方法。首先结合202名青年女性的三维点云数据确定与人体颈肩部形态相关的8个特征截面层,以各截面层中心点为基准点每隔10°测量角度半径并分析其与截面厚度、宽度之间的关系,建立各截面层的曲线形态规则。然后基于人体正侧面照片进行图像分割以提取人体轮廓,通过人体高度比例关系识别颈肩部特征点所在高度区域,结合颈肩部形态规律提取各特征截面层曲线形态规则所需参数。最后根据曲线形态规则和人体测量参数,通过NURBS曲面建模实现基于人体正侧面照片的颈肩部三维模型构建。结果表明:基于人体照片提取的人体基本参数值的误差百分比均小于5%,且使用该方法构建的三维模型与真实值之间的误差绝对值均在1 cm或1°以内。 展开更多
关键词 颈肩部形态 人体照片 尺寸提取 曲线规则 三维建模
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