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Automatic Hierarchical Arrangement of Vector Designs 矢量设计的自动分层排列
Matthew Fisher, V. Agarwal, T. Beri
We present a method that transforms an unstructured vector design into a logical hierarchy of groups of objects. Each group is a meaningful collection, formed by proximity in visual characteristics (like size, shape, color, etc.) and spatial location of objects and models the grouping principles designers use. We first simplify the input design by partially or completely flattening it and isolate duplicate geometries in the design (for example, repeating patterns due to copy and paste operations). Next we build the object containment hierarchy by assigning objects that are wholly enclosed inside the geometry of other objects as children of the enclosing parent. In the final clustering phase, we use agglomerative clustering to obtain a bottom-up hierarchical grouping of all objects by comparing and ranking all pairs of objects according to visual and spatial characteristics. Spatial proximity segregates far apart objects, but when they are identical (or near identical) designers generally prefer to keep (and edit) them together. To accommodate this, we detect near identical objects and group them together during clustering despite their spatial separation. We further restrict group formation so that z-order disturbances in the design keep the visual appearance unaffected for tightly-overlapping geometry. The generated organization is equivalent to the original design and the organization results are used to facilitate abstract navigation (hierarchical, lateral or near similar) and selections in the design. Our technique works well with a variety of input designs with commonly identifiable objects and structural patterns. CCS Concepts • Applied computing → Document analysis; • Information systems → Clustering;
我们提出了一种将非结构化向量设计转换为对象组的逻辑层次结构的方法。每一组都是一个有意义的集合,由视觉特征(如大小、形状、颜色等)和空间位置相近的对象和模型组成,设计师使用分组原则。我们首先通过部分或完全扁平化输入设计来简化输入设计,并隔离设计中重复的几何形状(例如,由于复制和粘贴操作而重复的图案)。接下来,我们通过将完全封闭在其他对象的几何内部的对象分配为封闭父对象的子对象来构建对象包含层次结构。在最后的聚类阶段,我们使用聚集聚类,通过对所有对对象的视觉和空间特征进行比较和排序,获得自下而上的所有对象的分层分组。空间上的接近会将相距很远的对象分隔开来,但当它们相同(或接近相同)时,设计师通常更喜欢将它们放在一起。为了适应这一点,我们检测几乎相同的对象,并在聚类过程中将它们分组在一起,尽管它们的空间分离。我们进一步限制组的形成,以便设计中的z阶干扰保持视觉外观不受紧密重叠几何的影响。生成的组织等同于原始设计,组织结果用于促进设计中的抽象导航(分层的、横向的或近似的)和选择。我们的技术可以很好地处理各种具有共同可识别对象和结构模式的输入设计。•应用计算→文档分析;•信息系统→集群;
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引用次数: 2
SHREC 2021: Surface-based Protein Domains Retrieval SHREC 2021:基于表面的蛋白质结构域检索
Florent Langenfeld, Tunde Aderinwale, Charles W Christoffer, Woong-Hee Shin, Genki Terashi, Xiao Wang, D. Kihara, H. Benhabiles, K. Hammoudi, A. Cabani, Féryal Windal, Mahmoud Melkemi, Ekpo Otu, R. Zwiggelaar, David Hunter, Yonghuai Liu, Léa Sirugue, Huu-Nghia H. Nguyen, Tuan-Duy H. Nguyen, Vinh-Thuyen Nguyen-Truong, D. Le, Hai-Dang Nguyen, M. Tran, M. Montès
Proteins are essential to nearly all cellular mechanism, and often interact through their surface with other cell molecules, such as proteins and ligands. The evolution generates plenty of different proteins, with unique abilities, but also proteins with related functions hence surface, which is therefore of primary importance for their activity. In the present work, we assess the ability of five methods to retrieve similar protein surfaces, using either their shape only (3D meshes), or their shape and the electrostatic potential at their surface, an important surface property. Five different groups participated in this challenge using the shape only, and one group extended its pre-existing algorithm to handle the electrostatic potential. The results reveal both the ability of the methods to detect related proteins and their difficulties to distinguish between topologically related proteins. CCS Concepts • Applied computing → Computational biology; • General and reference → Evaluation;
蛋白质对几乎所有的细胞机制都是必不可少的,并且经常通过它们的表面与其他细胞分子(如蛋白质和配体)相互作用。这种进化产生了许多不同的蛋白质,具有独特的能力,但也产生了具有相关功能的蛋白质,因此表面对它们的活性至关重要。在目前的工作中,我们评估了五种方法检索相似蛋白质表面的能力,要么只使用它们的形状(3D网格),要么使用它们的形状和表面的静电势(一个重要的表面特性)。五个不同的小组参加了这个挑战,只使用形状,一个小组扩展了其已有的算法来处理静电势。结果揭示了方法检测相关蛋白的能力和区分拓扑相关蛋白的困难。•应用计算→计算生物学;•一般与参考→评价;
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引用次数: 0
Robust Image Denoising using Kernel Predicting Networks 基于核预测网络的鲁棒图像去噪
Zhilin Cai, Yang Zhang, Marco Manzi, A. C. Öztireli, M. Gross, T. Aydin
We present a new method for designing high quality denoisers that are robust to varying noise characteristics of input images. Instead of taking a conventional blind denoising approach or relying on explicit noise parameter estimation networks as well as invertible camera imaging pipeline models, we propose a two-stage model that first processes an input image with a small set of specialized denoisers, and then passes the resulting intermediate denoised images to a kernel predicting network that estimates per-pixel denoising kernels. We demonstrate that our approach achieves robustness to noise parameters at a level that exceeds comparable blind denoisers, while also coming close to state-of-the-art denoising quality for camera sensor noise. CCS Concepts • Computing methodologies → Image processing;
我们提出了一种设计高质量去噪器的新方法,该方法对输入图像的不同噪声特性具有鲁棒性。我们没有采用传统的盲目去噪方法或依赖显式噪声参数估计网络以及反转相机成像管道模型,而是提出了一种两阶段模型,该模型首先用一小组专用去噪器处理输入图像,然后将得到的中间去噪图像传递给一个核预测网络,该网络估计每像素去噪核。我们证明,我们的方法在超过同类盲去噪器的水平上实现了对噪声参数的鲁棒性,同时也接近于最先进的相机传感器噪声去噪质量。•计算方法→图像处理;
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引用次数: 3
Shape Classification of Building Information Models using Neural Networks 基于神经网络的建筑信息模型形状分类
I. Evangelou, N. Vitsas, Georgios Papaioannou, Manolis Georgioudakis, A. Chatzisymeon
The Building Information Modelling (BIM) procedure introduces specifications and data exchange formats widely used by the construction industry to describe functional and geometric elements of building structures in the design, planning, cost estimation and construction phases of large civil engineering projects. In this paper we explain how to apply a modern, low-parameter, neural-network-based classification solution to the automatic geometric BIM element labeling, which is becoming an increasingly important task in software solutions for the construction industry. The network is designed so that it extracts features regarding general shape, scale and aspect ratio of each BIM element and be extremely fast during training and prediction. We evaluate our network architecture on a real BIM dataset and showcase accuracy that is difficult to achieve with a generic 3D shape classification network. CCS Concepts • Computing methodologies → Neural networks; Shape analysis;
在大型土木工程项目的设计、规划、成本估算和施工阶段,建筑信息模型(BIM)程序引入了建筑行业广泛使用的规范和数据交换格式,以描述建筑结构的功能和几何元素。在本文中,我们解释了如何将一种现代的、低参数的、基于神经网络的分类解决方案应用于BIM的自动几何元素标记,这在建筑行业的软件解决方案中正成为越来越重要的任务。该网络的设计使其能够提取每个BIM元素的一般形状、尺度和纵横比的特征,并且在训练和预测过程中速度非常快。我们在真实的BIM数据集上评估了我们的网络架构,并展示了使用通用3D形状分类网络难以实现的准确性。•计算方法→神经网络;形状分析;
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引用次数: 1
Visualising the Transition of Large Networks via Dimensionality Reduction to Illustrate the Evolution of the Human Brain 通过降维来可视化大网络的过渡,以说明人类大脑的进化
F. Ganglberger, J. Kaczanowska, W. Haubensak, K. Bühler
Advances in high-throughput imaging techniques enable the creation of networks depicting spatio-temporal biological and neurophysiological processes with unprecedented size and magnitude. These networks involve thousands of nodes, which can not be compared over time by traditional methods due to complexity and clutter. When investigating networks over multiple time steps, a crucial question for the visualisation research community becomes apparent: How to visually trace changes of the connectivity over several transitions? Therefore, we developed an easy-to-use method that maps multiple networks to a common embedding space. Visualising the distribution of node-clusters of interest (e.g. brain regions) enables their tracing over time. We demonstrate this approach by visualizing spatial co-evolution networks of different evolutionary timepoints as small multiples to investigate how the human brain genetically and functionally evolved over the mammalian lineage.
高通量成像技术的进步使得能够以前所未有的规模和幅度创建描绘时空生物和神经生理过程的网络。这些网络涉及数千个节点,由于复杂性和杂乱性,传统方法无法对其进行长期比较。当在多个时间步骤上研究网络时,可视化研究界的一个关键问题变得显而易见:如何在几个转换中可视化地跟踪连接的变化?因此,我们开发了一种易于使用的方法,将多个网络映射到一个共同的嵌入空间。可视化感兴趣的节点簇的分布(例如大脑区域)可以随着时间的推移进行追踪。我们通过将不同进化时间点的空间协同进化网络作为小倍数来研究人类大脑如何在哺乳动物谱系中遗传和功能进化来证明这种方法。
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引用次数: 0
Tight Normal Cone Merging for Efficient Collision Detection of Thin Deformable Objects 基于紧法向锥合并的薄变形物体有效碰撞检测
Dong-Hoon Han, Changyoon Lee, Sangbin Lee, Hyeongseok Ko
When simulating thin deformable objects such as clothes, collision detection alone takes a lot of computation. One way of reducing the computation is culling false-positives as much as possible. In the context of bounding volume hierarchy, Provot proposed a culling method that is based on hierarchical merging of normal enclosing cones. In this work, we investigate Provot’s merging algorithm and show that there is some room for improvement. We propose a new merging algorithm, in the context of discrete collision detection, which always produces an equal or tighter mergence than Provot’s merging. We extend the above algorithm so that it can be used in the context of continuous collision detection. Experiments show that the proposed method makes about 25% reduction in the number of triangle pairs for which vertex-triangle or edge-edge collision test has to be performed, and 18% reduction in time for collision detection. CCS Concepts • Computing methodologies → Collision detection;
当模拟薄的可变形物体(如衣服)时,仅碰撞检测就需要大量的计算。减少计算的一种方法是尽可能地剔除误报。在边界体分层的背景下,Provot提出了一种基于法向包围锥体分层合并的剔除方法。在这项工作中,我们研究了Provot的合并算法,并表明它有一些改进的空间。在离散碰撞检测的背景下,我们提出了一种新的合并算法,它总是产生与Provot合并相等或更严格的合并。我们扩展了上述算法,使其可以用于连续碰撞检测。实验表明,该方法可将需要进行顶点-三角形或边缘-三角形碰撞测试的三角形对数量减少约25%,碰撞检测时间减少18%。•计算方法→碰撞检测;
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引用次数: 1
Contributors 贡献者
Object Editorial Team
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引用次数: 0
Theses in Progress 正在进行的论文
Object Editorial Team
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引用次数: 0
Smoothed Particle Hydrodynamics Techniques for the Physics Based Simulation of Fluids and Solids 基于物理的流体和固体模拟的光滑粒子流体动力学技术
Dan Koschier, Jan Bender, B. Solenthaler, M. Teschner
Graphics research on Smoothed Particle Hydrodynamics (SPH) has produced fantastic visual results that are unique across the board of research communities concerned with SPH simulations. Generally, the SPH formalism serves as a spatial discretization technique, commonly used for the numerical simulation of continuum mechanical problems such as the simulation of fluids, highly viscous materials, and deformable solids. Recent advances in the field have made it possible to efficiently simulate massive scenes with highly complex boundary geometries on a single PC [Com16b, Com16a]. Moreover, novel techniques allow to robustly handle interactions among various materials [Com18,Com17]. As of today, graphics-inspired pressure solvers, neighborhood search algorithms, boundary formulations, and other contributions often serve as core components in commercial software for animation purposes [Nex17] as well as in computer-aided engineering software [FIF16]. This tutorial covers various aspects of SPH simulations. Governing equations for mechanical phenomena and their SPH discretizations are discussed. Concepts and implementations of core components such as neighborhood search algorithms, pressure solvers, and boundary handling techniques are presented. Implementation hints for the realization of SPH solvers for fluids, elastic solids, and rigid bodies are given. The tutorial combines the introduction of theoretical concepts with the presentation of actual implementations.
平滑粒子流体动力学(SPH)的图形研究产生了奇妙的视觉结果,这在研究SPH模拟的研究团体中是独一无二的。一般来说,SPH形式化作为一种空间离散化技术,通常用于连续介质力学问题的数值模拟,如流体、高粘性材料和可变形固体的模拟。该领域的最新进展使得在单个PC上有效地模拟具有高度复杂边界几何形状的大规模场景成为可能[Com16b, Com16a]。此外,新技术允许稳健地处理各种材料之间的相互作用[Com18,Com17]。时至今日,受图形启发的压力求解器、邻域搜索算法、边界公式和其他贡献常常作为动画目的商业软件的核心组件[Nex17]以及计算机辅助工程软件[FIF16]。本教程涵盖了SPH模拟的各个方面。讨论了力学现象的控制方程及其SPH离散化。介绍了核心组件的概念和实现,如邻域搜索算法、压力求解器和边界处理技术。给出了流体、弹性固体和刚体的SPH求解器的实现提示。本教程结合了理论概念的介绍和实际实现的展示。
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引用次数: 68
Treemap Literacy: A Classroom-Based Investigation 树图素养:基于课堂的调查
Elif E. Firat, A. Denisova, R. Laramee
Visualization literacy, the ability to interpret and understand visual designs, has gained momentum in the educational and information visualization communities. The goal of this research is to identify and address barriers to treemap literacy – a popular visual design, with a view to improve a non-expert user’s treemap visualization literacy skills. In this paper we present the results of two years of an information visualization assignment, which are used to identify the barriers to and challenges of understanding and creating treemaps. From this, we develop a treemap visualization literacy test. Then, we propose a pedagogical tool that facilitates both teaching and learning of treemaps and advances treemap visualization literacy. To investigate the efficiency of this educational software, we then conduct a classroom-based study with 25 participants. We identify the properties of treemaps that can hinder literacy and cognition based on the results from the treemap visualization literacy test. Results also provide further support for the use of our tool that had a positive effect on treemap literacy skills of university students.
可视化素养,解释和理解视觉设计的能力,在教育和信息可视化社区中获得了动力。这项研究的目标是识别和解决树图读写能力的障碍——一种流行的视觉设计,以提高非专业用户的树图可视化读写技能。在本文中,我们提出了两年的信息可视化作业的结果,这些结果用于识别理解和创建树图的障碍和挑战。以此为基础,我们开发了一个树图可视化读写能力测试。然后,我们提出了一种教学工具,促进了树图的教与学,并提高了树图可视化素养。为了调查这款教育软件的效率,我们对25名参与者进行了一项基于课堂的研究。根据树图可视化读写能力测试的结果,我们确定了树图的属性可能会阻碍读写和认知。研究结果也进一步支持了使用我们的工具对大学生树图读写技能的积极影响。
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引用次数: 17
期刊
Eurographics ... Workshop on 3D Object Retrieval : EG 3DOR. Eurographics Workshop on 3D Object Retrieval
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