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10.1145/2980179.2980240
Gesture3D: posing 3D characters via gesture drawings
https://doi.org/10.1145/2980179.2980240
[ "Mikhail Bessmeltsev", "Nicholas Vining", "Alla Sheffer" ]
Artists routinely use gesture drawings to communicate ideated character poses for storyboarding and other digital media. During subsequent posing of the 3D character models, they use these drawing as a reference, and perform the posing itself using 3D interfaces which require time and expert 3D knowledge to operate. We...
journal
10.1145/2980179.2980240
null
null
10.1145/2980179.2982425
Interactive mechanism modeling from multi-view images
https://doi.org/10.1145/2980179.2982425
[ "Mingliang Xu", "Mingyuan Li", "Weiwei Xu", "Zhigang Deng", "Yin Yang", "Kun Zhou" ]
In this paper, we present an interactive system for mechanism modeling from multi-view images. Its key feature is that the generated 3D mechanism models contain not only geometric shapes but also internal motion structures: they can be directly animated through kinematic simulation. Our system consists of two steps: in...
journal
10.1145/2980179.2982425
null
null
10.1145/2980179.2982418
Blocking harmful blue light while preserving image color appearance
https://doi.org/10.1145/2980179.2982418
[ "Kuang-Tsu Shih", "Jen-Shuo Liu", "Frank Shyu", "Su-Ling Yeh", "Homer H. Chen" ]
Recent study in vision science has shown that blue light in a certain frequency band affects human circadian rhythm and impairs our health. Although applying a light blocker to an image display can block the harmful blue light, it inevitably makes an image look like an aged photo. In this paper, we show that it is poss...
journal
10.1145/2980179.2982418
null
null
10.1145/2980179.2982436
Stochastic structural analysis for context-aware design and fabrication
https://doi.org/10.1145/2980179.2982436
[ "Timothy Langlois", "Ariel Shamir", "Daniel Dror", "Wojciech Matusik", "David I. W. Levin" ]
In this paper we propose failure probabilities as a semantically and mechanically meaningful measure of object fragility. We present a stochastic finite element method which exploits fast rigid body simulation and reduced-space approaches to compute spatially varying failure probabilities. We use an explicit rigid body...
journal
10.1145/2980179.2982436
null
null
10.1145/2980179.2982437
Vivace: a practical gauss-seidel method for stable soft body dynamics
https://doi.org/10.1145/2980179.2982437
[ "Marco Fratarcangeli", "Valentina Tibaldo", "Fabio Pellacini" ]
The solution of large sparse systems of linear constraints is at the base of most interactive solvers for physically-based animation of soft body dynamics. We focus on applications with hard and tight per-frame resource budgets, such as video games, where the solution of soft body dynamics needs to be computed in a few...
journal
10.1145/2980179.2982437
null
null
10.1145/2980179.2980231
Computing inversion-free mappings by simplex assembly
https://doi.org/10.1145/2980179.2980231
[ "Xiao-Ming Fu", "Yang Liu" ]
We present a novel method, called Simplex Assembly , to compute inversion-free mappings with low or bounded distortion on simplicial meshes. Our method involves two steps: simplex disassembly and simplex assembly. Given a simplicial mesh and its initial piecewise affine mapping, we project the affine transformation ass...
journal
10.1145/2980179.2980231
null
null
10.1145/2980179.2982430
A scalable schur-complement fluids solver for heterogeneous compute platforms
https://doi.org/10.1145/2980179.2982430
[ "Haixiang Liu", "Nathan Mitchell", "Mridul Aanjaneya", "Eftychios Sifakis" ]
We present a scalable parallel solver for the pressure Poisson equation in fluids simulation which can accommodate complex irregular domains in the order of a billion degrees of freedom, using a single server or workstation fitted with GPU or Many-Core accelerators. The design of our numerical technique is attuned to t...
journal
10.1145/2980179.2982430
null
null
10.1145/2980179.2982399
Deep joint demosaicking and denoising
https://doi.org/10.1145/2980179.2982399
[ "Michaël Gharbi", "Gaurav Chaurasia", "Sylvain Paris", "Frédo Durand" ]
Demosaicking and denoising are the key first stages of the digital imaging pipeline but they are also a severely ill-posed problem that infers three color values per pixel from a single noisy measurement. Earlier methods rely on hand-crafted filters or priors and still exhibit disturbing visual artifacts in hard cases ...
journal
10.1145/2980179.2982399
null
null
10.1145/2980179.2982396
Minimal BRDF sampling for two-shot near-field reflectance acquisition
https://doi.org/10.1145/2980179.2982396
[ "Zexiang Xu", "Jannik Boll Nielsen", "Jiyang Yu", "Henrik Wann Jensen", "Ravi Ramamoorthi" ]
We develop a method to acquire the BRDF of a homogeneous flat sample from only two images, taken by a near-field perspective camera, and lit by a directional light source. Our method uses the MERL BRDF database to determine the optimal set of lightview pairs for data-driven reflectance acquisition. We develop a mathema...
journal
10.1145/2980179.2982396
null
null
10.1145/2980179.2980236
Descent methods for elastic body simulation on the GPU
https://doi.org/10.1145/2980179.2980236
[ "Huamin Wang", "Yin Yang" ]
We show that many existing elastic body simulation approaches can be interpreted as descent methods, under a nonlinear optimization framework derived from implicit time integration. The key question is how to find an effective descent direction with a low computational cost. Based on this concept, we propose a new grad...
journal
10.1145/2980179.2980236
null
null
10.1145/2980179.2980232
Mesh denoising via cascaded normal regression
https://doi.org/10.1145/2980179.2980232
[ "Peng-Shuai Wang", "Yang Liu", "Xin Tong" ]
We present a data-driven approach for mesh denoising. Our key idea is to formulate the denoising process with cascaded non-linear regression functions and learn them from a set of noisy meshes and their ground-truth counterparts. Each regression function infers the normal of a denoised output mesh facet from geometry f...
journal
10.1145/2980179.2980232
null
null
10.1145/2980179.2980257
Jump: virtual reality video
https://doi.org/10.1145/2980179.2980257
[ "Robert Anderson", "David Gallup", "Jonathan T. Barron", "Janne Kontkanen", "Noah Snavely", "Carlos Hernández", "Sameer Agarwal", "Steven M. Seitz" ]
We present Jump, a practical system for capturing high resolution, omnidirectional stereo (ODS) video suitable for wide scale consumption in currently available virtual reality (VR) headsets. Our system consists of a video camera built using off-the-shelf components and a fully automatic stitching pipeline capable of c...
journal
10.1145/2980179.2980257
null
null
10.1145/2980179.2980241
Block assembly for global registration of building scans
https://doi.org/10.1145/2980179.2980241
[ "Feilong Yan", "Liangliang Nan", "Peter Wonka" ]
We propose a framework for global registration of building scans. The first contribution of our work is to detect and use portals (e.g., doors and windows) to improve the local registration between two scans. Our second contribution is an optimization based on a linear integer programming formulation. We abstract each ...
journal
10.1145/2980179.2980241
null
null
10.1145/2980179.2980218
Low-discrepancy blue noise sampling
https://doi.org/10.1145/2980179.2980218
[ "Abdalla G. M. Ahmed", "Hélène Perrier", "David Coeurjolly", "Victor Ostromoukhov", "Jianwei Guo", "Dong-Ming Yan", "Hui Huang", "Oliver Deussen" ]
We present a novel technique that produces two-dimensional low-discrepancy (LD) blue noise point sets for sampling. Using one-dimensional binary van der Corput sequences, we construct two-dimensional LD point sets, and rearrange them to match a target spectral profile while preserving their low discrepancy. We store th...
journal
10.1145/2980179.2980218
null
null
10.1145/2980179.2980253
Shape2Vec: semantic-based descriptors for 3D shapes, sketches and images
https://doi.org/10.1145/2980179.2980253
[ "Flora Ponjou Tasse", "Neil Dodgson" ]
Convolutional neural networks have been successfully used to compute shape descriptors, or jointly embed shapes and sketches in a common vector space. We propose a novel approach that leverages both labeled 3D shapes and semantic information contained in the labels, to generate semantically-meaningful shape descriptors...
journal
10.1145/2980179.2980253
null
null
10.1145/2980179.2982404
Unsupervised texture transfer from images to model collections
https://doi.org/10.1145/2980179.2982404
[ "Tuanfeng Y. Wang", "Hao Su", "Qixing Huang", "Jingwei Huang", "Leonidas Guibas", "Niloy J. Mitra" ]
Large 3D model repositories of common objects are now ubiquitous and are increasingly being used in computer graphics and computer vision for both analysis and synthesis tasks. However, images of objects in the real world have a richness of appearance that these repositories do not capture, largely because most existin...
journal
10.1145/2980179.2982404
null
null
10.1145/2980179.2980233
Model-based teeth reconstruction
https://doi.org/10.1145/2980179.2980233
[ "Chenglei Wu", "Derek Bradley", "Pablo Garrido", "Michael Zollhöfer", "Christian Theobalt", "Markus Gross", "Thabo Beeler" ]
In recent years, sophisticated image-based reconstruction methods for the human face have been developed. These methods capture highly detailed static and dynamic geometry of the whole face, or specific models of face regions, such as hair, eyes or eye lids. Unfortunately, image-based methods to capture the mouth cavit...
journal
10.1145/2980179.2980233
null
null
10.1145/2980179.2980245
Optimal voronoi tessellations with hessian-based anisotropy
https://doi.org/10.1145/2980179.2980245
[ "Max Budninskiy", "Beibei Liu", "Fernando de Goes", "Yiying Tong", "Pierre Alliez", "Mathieu Desbrun" ]
This paper presents a variational method to generate cell complexes with local anisotropy conforming to the Hessian of any given convex function and for any given local mesh density. Our formulation builds upon approximation theory to offer an anisotropic extension of Centroidal Voronoi Tessellations which can be seen ...
journal
10.1145/2980179.2980245
null
null
10.1145/2980179.2980250
Printone: interactive resonance simulation for free-form print-wind instrument design
https://doi.org/10.1145/2980179.2980250
[ "Nobuyuki Umetani", "Athina Panotopoulou", "Ryan Schmidt", "Emily Whiting" ]
This paper presents an interactive design interface for three-dimensional free-form musical wind instruments. The sound of a wind instrument is governed by the acoustic resonance as a result of complicated interactions of sound waves and internal geometries of the instrument. Thus, creating an original free-form wind i...
journal
10.1145/2980179.2980250
null
null
10.1145/2980179.2982439
GST: GPU-decodable supercompressed textures
https://doi.org/10.1145/2980179.2982439
[ "Pavel Krajcevski", "Srihari Pratapa", "Dinesh Manocha" ]
Modern GPUs supporting compressed textures allow interactive application developers to save scarce GPU resources such as VRAM and bandwidth. Compressed textures use fixed compression ratios whose lossy representations are significantly poorer quality than traditional image compression formats such as JPEG. We present a...
journal
10.1145/2980179.2982439
null
null
10.1145/2980179.2982411
Robust light transport simulation via metropolised bidirectional estimators
https://doi.org/10.1145/2980179.2982411
[ "Martin Šik", "Hisanari Otsu", "Toshiya Hachisuka", "Jaroslav Křivánek" ]
Efficiently simulating light transport in various scenes with a single algorithm is a difficult and important problem in computer graphics. Two major issues have been shown to hinder the efficiency of the existing solutions: light transport due to multiple highly glossy or specular interactions, and scenes with complex...
journal
10.1145/2980179.2982411
null
null
10.1145/2980179.2982422
Directing user attention via visual flow on web designs
https://doi.org/10.1145/2980179.2982422
[ "Xufang Pang", "Ying Cao", "Rynson W. H. Lau", "Antoni B. Chan" ]
We present a novel approach that allows web designers to easily direct user attention via visual flow on web designs. By collecting and analyzing users' eye gaze data on real-world webpages under the task-driven condition, we build two user attention models that characterize user attention patterns between a pair of pa...
journal
10.1145/2980179.2982422
null
null
10.1145/2980179.2980228
Downsampling scattering parameters for rendering anisotropic media
https://doi.org/10.1145/2980179.2980228
[ "Shuang Zhao", "Lifan Wu", "Frédo Durand", "Ravi Ramamoorthi" ]
Volumetric micro-appearance models have provided remarkably high-quality renderings, but are highly data intensive and usually require tens of gigabytes in storage. When an object is viewed from a distance, the highest level of detail offered by these models is usually unnecessary, but traditional linear downsampling w...
journal
10.1145/2980179.2980228
null
null
10.1145/2980179.2982424
Manifold differential evolution (MDE): a global optimization method for geodesic centroidal voronoi tessellations on meshes
https://doi.org/10.1145/2980179.2982424
[ "Yong-Jin Liu", "Chun-Xu Xu", "Ran Yi", "Dian Fan", "Ying He" ]
Computing centroidal Voronoi tessellations (CVT) has many applications in computer graphics. The existing methods, such as the Lloyd algorithm and the quasi-Newton solver, are efficient and easy to implement; however, they compute only the local optimal solutions due to the highly non-linear nature of the CVT energy. T...
journal
10.1145/2980179.2982424
null
null
10.1145/2980179.2982442
WarpDriver: context-aware probabilistic motion prediction for crowd simulation
https://doi.org/10.1145/2980179.2982442
[ "David Wolinski", "Ming C. Lin", "Julien Pettré" ]
Microscopic crowd simulators rely on models of local interaction (e.g. collision avoidance) to synthesize the individual motion of each virtual agent. The quality of the resulting motions heavily depends on this component, which has significantly improved in the past few years. Recent advances have been in particular d...
journal
10.1145/2980179.2982442
null
null
10.1145/2980179.2982400
Crumpling sound synthesis
https://doi.org/10.1145/2980179.2982400
[ "Gabriel Cirio", "Dingzeyu Li", "Eitan Grinspun", "Miguel A. Otaduy", "Changxi Zheng" ]
Crumpling a thin sheet produces a characteristic sound, comprised of distinct clicking sounds corresponding to buckling events. We propose a physically based algorithm that automatically synthesizes crumpling sounds for a given thin shell animation. The resulting sound is a superposition of individually synthesized cli...
journal
10.1145/2980179.2982400
null
null
10.1145/2980179.2980224
3D attention-driven depth acquisition for object identification
https://doi.org/10.1145/2980179.2980224
[ "Kai Xu", "Yifei Shi", "Lintao Zheng", "Junyu Zhang", "Min Liu", "Hui Huang", "Hao Su", "Daniel Cohen-Or", "Baoquan Chen" ]
We address the problem of autonomously exploring unknown objects in a scene by consecutive depth acquisitions. The goal is to reconstruct the scene while online identifying the objects from among a large collection of 3D shapes. Fine-grained shape identification demands a meticulous series of observations attending to ...
journal
10.1145/2980179.2980224
null
null
10.1145/2980179.2980251
Learning-based view synthesis for light field cameras
https://doi.org/10.1145/2980179.2980251
[ "Nima Khademi Kalantari", "Ting-Chun Wang", "Ravi Ramamoorthi" ]
With the introduction of consumer light field cameras, light field imaging has recently become widespread. However, there is an inherent trade-off between the angular and spatial resolution, and thus, these cameras often sparsely sample in either spatial or angular domain. In this paper, we use machine learning to miti...
journal
10.1145/2980179.2980251
1609.02974
title_snapshot
10.1145/2980179.2980219
Computational bounce flash for indoor portraits
https://doi.org/10.1145/2980179.2980219
[ "Lukas Murmann", "Abe Davis", "Jan Kautz", "Frédo Durand" ]
Portraits taken with direct flash look harsh and unflattering because the light source comes from a small set of angles very close to the camera. Advanced photographers address this problem by using bounce flash , a technique where the flash is directed towards other surfaces in the room, creating a larger, virtual lig...
journal
10.1145/2980179.2980219
null
null
10.1145/2980179.2982408
Practical 3D frame field generation
https://doi.org/10.1145/2980179.2982408
[ "Nicolas Ray", "Dmitry Sokolov", "Bruno Lévy" ]
Given a tetrahedral mesh, the algorithm described in this article produces a smooth 3D frame field, i.e. a set of three orthogonal directions associated with each vertex of the input mesh. The field varies smoothly inside the volume, and matches the normals of the volume boundary. Such a 3D frame field is a key compone...
journal
10.1145/2980179.2982408
null
null
10.1145/2980179.2982440
Data-driven inverse dynamics for human motion
https://doi.org/10.1145/2980179.2982440
[ "Xiaolei Lv", "Jinxiang Chai", "Shihong Xia" ]
Inverse dynamics is an important and challenging problem in human motion modeling, synthesis and simulation, as well as in robotics and biomechanics. Previous solutions to inverse dynamics are often noisy and ambiguous particularly when double stances occur. In this paper, we present a novel inverse dynamics method tha...
journal
10.1145/2980179.2982440
null
null
10.1145/2980179.2980221
Birefractive stereo imaging for single-shot depth acquisition
https://doi.org/10.1145/2980179.2980221
[ "Seung-Hwan Baek", "Diego Gutierrez", "Min H. Kim" ]
We propose a novel birefractive depth acquisition method, which allows for single-shot depth imaging by just placing a birefringent material in front of the lens. While most transmissive materials present a single refractive index per wavelength, birefringent crystals like calcite posses two, resulting in a double refr...
journal
10.1145/2980179.2980221
null
null
10.1145/2980179.2980243
Robust background identification for dynamic video editing
https://doi.org/10.1145/2980179.2980243
[ "Fang-Lue Zhang", "Xian Wu", "Hao-Tian Zhang", "Jue Wang", "Shi-Min Hu" ]
Extracting background features for estimating the camera path is a key step in many video editing and enhancement applications. Existing approaches often fail on highly dynamic videos that are shot by moving cameras and contain severe foreground occlusion. Based on existing theories, we present a new, practical method ...
journal
10.1145/2980179.2980243
null
null
10.1145/2980179.2982435
Stair blue noise sampling
https://doi.org/10.1145/2980179.2982435
[ "Bhavya Kailkhura", "Jayaraman J. Thiagarajan", "Peer-Timo Bremer", "Pramod K. Varshney" ]
A common solution to reducing visible aliasing artifacts in image reconstruction is to employ sampling patterns with a blue noise power spectrum. These sampling patterns can prevent discernible artifacts by replacing them with incoherent noise. Here, we propose a new family of blue noise distributions, Stair blue noise...
journal
10.1145/2980179.2982435
null
null
10.1145/2980179.2980244
Adaptive matrix column sampling and completion for rendering participating media
https://doi.org/10.1145/2980179.2980244
[ "Yuchi Huo", "Rui Wang", "Tianlei Hu", "Wei Hua", "Hujun Bao" ]
Several scalable many-light rendering methods have been proposed recently for the efficient computation of global illumination. However, gathering contributions of virtual lights in participating media remains an inefficient and time-consuming task. In this paper, we present a novel sparse sampling and reconstruction m...
journal
10.1145/2980179.2980244
null
null
10.1145/2980179.2982443
Image-space control variates for rendering
https://doi.org/10.1145/2980179.2982443
[ "Fabrice Rousselle", "Wojciech Jarosz", "Jan Novák" ]
We explore the theory of integration with control variates in the context of rendering. Our goal is to optimally combine multiple estimators using their covariances. We focus on two applications, re-rendering and gradient-domain rendering, where we exploit coherence between temporally and spatially adjacent pixels. We ...
journal
10.1145/2980179.2982443
null
null
10.1145/2980179.2980235
EgoCap: egocentric marker-less motion capture with two fisheye cameras
https://doi.org/10.1145/2980179.2980235
[ "Helge Rhodin", "Christian Richardt", "Dan Casas", "Eldar Insafutdinov", "Mohammad Shafiei", "Hans-Peter Seidel", "Bernt Schiele", "Christian Theobalt" ]
Marker-based and marker-less optical skeletal motion-capture methods use an outside-in arrangement of cameras placed around a scene, with viewpoints converging on the center. They often create discomfort with marker suits, and their recording volume is severely restricted and often constrained to indoor scenes with con...
journal
10.1145/2980179.2980235
1609.07306
title_snapshot
10.1145/2980179.2980238
A scalable active framework for region annotation in 3D shape collections
https://doi.org/10.1145/2980179.2980238
[ "Li Yi", "Vladimir G. Kim", "Duygu Ceylan", "I-Chao Shen", "Mengyan Yan", "Hao Su", "Cewu Lu", "Qixing Huang", "Alla Sheffer", "Leonidas Guibas" ]
Large repositories of 3D shapes provide valuable input for data-driven analysis and modeling tools. They are especially powerful once annotated with semantic information such as salient regions and functional parts. We propose a novel active learning method capable of enriching massive geometric datasets with accurate ...
journal
10.1145/2980179.2980238
null
null
10.1145/2980179.2982416
Dynamic furniture modeling through assembly instructions
https://doi.org/10.1145/2980179.2982416
[ "Tianjia Shao", "Dongping Li", "Yuliang Rong", "Changxi Zheng", "Kun Zhou" ]
We present a technique for parsing widely used furniture assembly instructions, and reconstructing the 3D models of furniture components and their dynamic assembly process. Our technique takes as input a multi-step assembly instruction in a vector graphic format and starts to group the vector graphic primitives into se...
journal
10.1145/2980179.2982416
null
null
10.1145/2980179.2982428
Centroidal power diagrams with capacity constraints: computation, applications, and extension
https://doi.org/10.1145/2980179.2982428
[ "Shi-Qing Xin", "Bruno Lévy", "Zhonggui Chen", "Lei Chu", "Yaohui Yu", "Changhe Tu", "Wenping Wang" ]
This article presents a new method to optimally partition a geometric domain with capacity constraints on the partitioned regions. It is an important problem in many fields, ranging from engineering to economics. It is known that a capacity-constrained partition can be obtained as a power diagram with the squared L2 me...
journal
10.1145/2980179.2982428
null
null
10.1145/2980179.2982432
Emptying, refurnishing, and relighting indoor spaces
https://doi.org/10.1145/2980179.2982432
[ "Edward Zhang", "Michael F. Cohen", "Brian Curless" ]
Visualizing changes to indoor scenes is important for many applications. When looking for a new place to live, we want to see how the interior looks not with the current inhabitant's belongings, but with our own furniture. Before purchasing a new sofa, we want to visualize how it would look in our living room. In this ...
journal
10.1145/2980179.2982432
null
null
10.1145/2980179.2980234
Pyramid of arclength descriptor for generating collage of shapes
https://doi.org/10.1145/2980179.2980234
[ "Kin Chung Kwan", "Lok Tsun Sinn", "Chu Han", "Tien-Tsin Wong", "Chi-Wing Fu" ]
This paper tackles a challenging 2D collage generation problem, focusing on shapes: we aim to fill a given region by packing irregular and reasonably-sized shapes with minimized gaps and overlaps. To achieve this nontrivial problem, we first have to analyze the boundary of individual shapes and then couple the shapes w...
journal
10.1145/2980179.2980234
null
null
10.1145/2980179.2982433
Fast and reliable example-based mesh IK for stylized deformations
https://doi.org/10.1145/2980179.2982433
[ "Kevin Wampler" ]
Example-based shape deformation allows a mesh to be easily manipulated or animated with simple inputs. As the user pulls parts of the shape, the rest of the mesh automatically changes in an intuitive way by drawing from a set of exemplars. This provides a way for virtual shapes or characters to be easily authored and m...
journal
10.1145/2980179.2982433
null
null
10.1145/2980179.2982410
Relationship templates for creating scene variations
https://doi.org/10.1145/2980179.2982410
[ "Xi Zhao", "Ruizhen Hu", "Paul Guerrero", "Niloy Mitra", "Taku Komura" ]
We propose a novel example-based approach to synthesize scenes with complex relations, e.g., when one object is 'hooked', 'surrounded', 'contained' or 'tucked into' another object. Existing relationship descriptors used in automatic scene synthesis methods are based on contacts or relative vectors connecting the object...
journal
10.1145/2980179.2982410
null
null
10.1145/2980179.2980256
Temporal gradient-domain path tracing
https://doi.org/10.1145/2980179.2980256
[ "Marco Manzi", "Markus Kettunen", "Frédo Durand", "Matthias Zwicker", "Jaakko Lehtinen" ]
We present a novel approach to improve temporal coherence in Monte Carlo renderings of animation sequences. Unlike other approaches that exploit temporal coherence in a post-process, our technique does so already during sampling. Building on previous gradient-domain rendering techniques that sample finite differences o...
journal
10.1145/2980179.2980256
null
null
10.1145/2980179.2982441
Power coordinates: a geometric construction of barycentric coordinates on convex polytopes
https://doi.org/10.1145/2980179.2982441
[ "Max Budninskiy", "Beibei Liu", "Yiying Tong", "Mathieu Desbrun" ]
We present a full geometric parameterization of generalized barycentric coordinates on convex polytopes. We show that these continuous and non-negative coefficients ensuring linear precision can be efficiently and exactly computed through a power diagram of the polytope's vertices and the evaluation point. In particula...
journal
10.1145/2980179.2982441
null
null
10.1145/2980179.2980220
Simultaneous acquisition of microscale reflectance and normals
https://doi.org/10.1145/2980179.2980220
[ "Giljoo Nam", "Joo Ho Lee", "Hongzhi Wu", "Diego Gutierrez", "Min H. Kim" ]
Acquiring microscale reflectance and normals is useful for digital documentation and identification of real-world materials. However, its simultaneous acquisition has rarely been explored due to the difficulties of combining both sources of information at such small scale. In this paper, we capture both spatially-varyi...
journal
10.1145/2980179.2980220
null
null
10.1145/2980179.2980252
High-fidelity facial and speech animation for VR HMDs
https://doi.org/10.1145/2980179.2980252
[ "Kyle Olszewski", "Joseph J. Lim", "Shunsuke Saito", "Hao Li" ]
Significant challenges currently prohibit expressive interaction in virtual reality (VR). Occlusions introduced by head-mounted displays (HMDs) make existing facial tracking techniques intractable, and even state-of-the-art techniques used for real-time facial tracking in unconstrained environments fail to capture subt...
journal
10.1145/2980179.2980252
null
null
10.1145/2980179.2982406
Fabrication of freeform objects by principal strips
https://doi.org/10.1145/2980179.2982406
[ "Masahito Takezawa", "Takuma Imai", "Kentaro Shida", "Takashi Maekawa" ]
Current CAD modeling techniques enable the design of objects with aesthetically pleasing smooth freeform surfaces. However, the fabrication of these freeform shapes remains challenging. Our novel method uses orthogonal principal strips to fabricate objects whose boundary consists of freeform surfaces. This approach not...
journal
10.1145/2980179.2982406
null
null
10.1145/2980179.2980249
Regional foremost matching for internet scene images
https://doi.org/10.1145/2980179.2980249
[ "Xiaoyong Shen", "Xin Tao", "Chao Zhou", "Hongyun Gao", "Jiaya Jia" ]
We analyze the dense matching problem for Internet scene images based on the fact that commonly only part of images can be matched due to the variation of view angle, motion, objects, etc. We thus propose regional foremost matching to reject outlier matching points while still producing dense high-quality correspondenc...
journal
10.1145/2980179.2980249
null
null
10.1145/2980179.2982402
Interchangeable components for hands-on assembly based modelling
https://doi.org/10.1145/2980179.2982402
[ "Noah Duncan", "Lap-Fai Yu", "Sai-Kit Yeung" ]
Interchangeable components allow an object to be easily reconfigured, but usually reveal that the object is composed of parts. In this work, we present a computational approach for the design of components which are interchangeable, but also form objects with a coherent appearance which conceals their composition from ...
journal
10.1145/2980179.2982402
null
null
10.1145/2980179.2980222
Parallel recursive filtering of infinite input extensions
https://doi.org/10.1145/2980179.2980222
[ "Diego Nehab", "André Maximo" ]
Filters with slowly decaying impulse responses have many uses in computer graphics. Recursive filters are often the fastest option for such cases. In this paper, we derive closed-form formulas for computing the exact initial feedbacks needed for recursive filtering infinite input extensions. We provide formulas for the...
journal
10.1145/2980179.2980222
null
null
10.1145/2980179.2982414
High-resolution interaction with corotational coarsening models
https://doi.org/10.1145/2980179.2982414
[ "Rosell Torres", "Alejandro Rodríguez", "José M. Espadero", "Miguel A. Otaduy" ]
This paper presents a numerical coarsening method for corotational elasticity, which enables interactive large deformation of high-resolution heterogeneous objects. Our method derives a coarse elastic model from a high-resolution discretization of corotational elasticity with high-resolution boundary conditions. This i...
journal
10.1145/2980179.2982414
null
null
10.1145/2980179.2982398
Temporally coherent completion of dynamic video
https://doi.org/10.1145/2980179.2982398
[ "Jia-Bin Huang", "Sing Bing Kang", "Narendra Ahuja", "Johannes Kopf" ]
We present an automatic video completion algorithm that synthesizes missing regions in videos in a temporally coherent fashion. Our algorithm can handle dynamic scenes captured using a moving camera. State-of-the-art approaches have difficulties handling such videos because viewpoint changes cause image-space motion ve...
journal
10.1145/2980179.2982398
null
null
10.1145/2980179.2980247
Sparse-as-possible SVBRDF acquisition
https://doi.org/10.1145/2980179.2980247
[ "Zhiming Zhou", "Guojun Chen", "Yue Dong", "David Wipf", "Yong Yu", "John Snyder", "Xin Tong" ]
We present a novel method for capturing real-world, spatially-varying surface reflectance from a small number of object views ( k ). Our key observation is that a specific target's reflectance can be represented by a small number of custom basis materials ( N ) convexly blended by an even smaller number of non-zero wei...
journal
10.1145/2980179.2980247
null
null
10.1145/2980179.2982421
SMASH: physics-guided reconstruction of collisions from videos
https://doi.org/10.1145/2980179.2982421
[ "Aron Monszpart", "Nils Thuerey", "Niloy J. Mitra" ]
Collision sequences are commonly used in games and entertainment to add drama and excitement. Authoring even two body collisions in the real world can be difficult, as one has to get timing and the object trajectories to be correctly synchronized. After tedious trial-and-error iterations, when objects can actually be m...
journal
10.1145/2980179.2982421
1603.08984
title_snapshot
10.1145/2980179.2982419
Corrective 3D reconstruction of lips from monocular video
https://doi.org/10.1145/2980179.2982419
[ "Pablo Garrido", "Michael Zollhöfer", "Chenglei Wu", "Derek Bradley", "Patrick Pérez", "Thabo Beeler", "Christian Theobalt" ]
In facial animation, the accurate shape and motion of the lips of virtual humans is of paramount importance, since subtle nuances in mouth expression strongly influence the interpretation of speech and the conveyed emotion. Unfortunately, passive photometric reconstruction of expressive lip motions, such as a kiss or r...
journal
10.1145/2980179.2982419
null
null
10.1145/2980179.2982397
FlexMolds: automatic design of flexible shells for molding
https://doi.org/10.1145/2980179.2982397
[ "Luigi Malomo", "Nico Pietroni", "Bernd Bickel", "Paolo Cignoni" ]
We present FlexMolds, a novel computational approach to automatically design flexible, reusable molds that, once 3D printed, allow us to physically fabricate, by means of liquid casting, multiple copies of complex shapes with rich surface details and complex topology. The approach to design such flexible molds is based...
journal
10.1145/2980179.2982397
null
null
10.1145/2980179.2982434
Efficient GPU path rendering using scanline rasterization
https://doi.org/10.1145/2980179.2982434
[ "Rui Li", "Qiming Hou", "Kun Zhou" ]
We introduce a novel GPU path rendering method based on scan-line rasterization, which is highly work-efficient but traditionally considered as GPU hostile. Our method is parallelized over boundary fragments , i.e., pixels directly intersecting the path boundary. Non-boundary pixels are processed in bulk as horizontal ...
journal
10.1145/2980179.2982434
null
null
10.1145/2980179.2982431
Interactive sound propagation with bidirectional path tracing
https://doi.org/10.1145/2980179.2982431
[ "Chunxiao Cao", "Zhong Ren", "Carl Schissler", "Dinesh Manocha", "Kun Zhou" ]
We introduce Bidirectional Sound Transport (BST) , a new algorithm that simulates sound propagation by bidirectional path tracing using multiple importance sampling. Our approach can handle multiple sources in large virtual environments with complex occlusion, and can produce plausible acoustic effects at an interactiv...
journal
10.1145/2980179.2982431
null
null
10.1145/2980179.2982438
Reconstructing personalized anatomical models for physics-based body animation
https://doi.org/10.1145/2980179.2982438
[ "Petr Kadleček", "Alexandru-Eugen Ichim", "Tiantian Liu", "Jaroslav Křivánek", "Ladislav Kavan" ]
We present a method to create personalized anatomical models ready for physics-based animation, using only a set of 3D surface scans. We start by building a template anatomical model of an average male which supports deformations due to both 1) subject-specific variations: shapes and sizes of bones, muscles, and adipos...
journal
10.1145/2980179.2982438
null
null
10.1145/2980179.2980229
Eulerian solid-fluid coupling
https://doi.org/10.1145/2980179.2980229
[ "Yun Teng", "David I. W. Levin", "Theodore Kim" ]
We present a new method that achieves a two-way coupling between deformable solids and an incompressible fluid where the underlying geometric representation is entirely Eulerian. Using the recently developed Eulerian Solids approach [Levin et al. 2011], we are able to simulate multiple solids undergoing complex, fricti...
journal
10.1145/2980179.2980229
null
null
10.1145/2980179.2980242
An intuitive control space for material appearance
https://doi.org/10.1145/2980179.2980242
[ "Ana Serrano", "Diego Gutierrez", "Karol Myszkowski", "Hans-Peter Seidel", "Belen Masia" ]
Many different techniques for measuring material appearance have been proposed in the last few years. These have produced large public datasets, which have been used for accurate, data-driven appearance modeling. However, although these datasets have allowed us to reach an unprecedented level of realism in visual appea...
journal
10.1145/2980179.2980242
1806.04950
title_snapshot
10.1145/2980179.2982409
Structure-oriented networks of shape collections
https://doi.org/10.1145/2980179.2982409
[ "Noa Fish", "Oliver van Kaick", "Amit Bermano", "Daniel Cohen-Or" ]
We introduce a co-analysis technique designed for correspondence inference within large shape collections. Such collections are naturally rich in variation, adding ambiguity to the notoriously difficult problem of correspondence computation. We leverage the robustness of correspondences between similar shapes to addres...
journal
10.1145/2980179.2982409
null
null
10.1145/2980179.2980230
Motion parallax in stereo 3D: model and applications
https://doi.org/10.1145/2980179.2980230
[ "Petr Kellnhofer", "Piotr Didyk", "Tobias Ritschel", "Belen Masia", "Karol Myszkowski", "Hans-Peter Seidel" ]
Binocular disparity is the main depth cue that makes stereoscopic images appear 3D. However, in many scenarios, the range of depth that can be reproduced by this cue is greatly limited and typically fixed due to constraints imposed by displays. For example, due to the low angular resolution of current automultiscopic s...
journal
10.1145/2980179.2980230
null
null
10.1145/2980179.2980254
Burst photography for high dynamic range and low-light imaging on mobile cameras
https://doi.org/10.1145/2980179.2980254
[ "Samuel W. Hasinoff", "Dillon Sharlet", "Ryan Geiss", "Andrew Adams", "Jonathan T. Barron", "Florian Kainz", "Jiawen Chen", "Marc Levoy" ]
Cell phone cameras have small apertures, which limits the number of photons they can gather, leading to noisy images in low light. They also have small sensor pixels, which limits the number of electrons each pixel can store, leading to limited dynamic range. We describe a computational photography pipeline that captur...
journal
10.1145/2980179.2980254
null
null
10.1145/2980179.2982407
Texture space caching and reconstruction for ray tracing
https://doi.org/10.1145/2980179.2982407
[ "Jacob Munkberg", "Jon Hasselgren", "Petrik Clarberg", "Magnus Andersson", "Tomas Akenine-Möller" ]
We present a texture space caching and reconstruction system for Monte Carlo ray tracing. Our system gathers and filters shading on-demand, including querying secondary rays, directly within a filter footprint around the current shading point. We shade on local grids in texture space with primary visibility decoupled f...
journal
10.1145/2980179.2982407
null
null
10.1145/2980179.2980227
Representing and scheduling procedural generation using operator graphs
https://doi.org/10.1145/2980179.2980227
[ "Pedro Boechat", "Mark Dokter", "Michael Kenzel", "Hans-Peter Seidel", "Dieter Schmalstieg", "Markus Steinberger" ]
In this paper, we present the concept of operator graph scheduling for high performance procedural generation on the graphics processing unit (GPU). The operator graph forms an intermediate representation that describes all possible operations and objects that can arise during a specific procedural generation. While pr...
journal
10.1145/2980179.2980227
null
null
10.1145/2980179.2982420
Scalable inside-out image-based rendering
https://doi.org/10.1145/2980179.2982420
[ "Peter Hedman", "Tobias Ritschel", "George Drettakis", "Gabriel Brostow" ]
Our aim is to give users real-time free-viewpoint rendering of real indoor scenes, captured with off-the-shelf equipment such as a high-quality color camera and a commodity depth sensor. Image-based Rendering (IBR) can provide the realistic imagery required at real-time speed. For indoor scenes however, two challenges ...
journal
10.1145/2980179.2982420
null
null
10.1145/2980179.2982423
Bilateral guided upsampling
https://doi.org/10.1145/2980179.2982423
[ "Jiawen Chen", "Andrew Adams", "Neal Wadhwa", "Samuel W. Hasinoff" ]
We present an algorithm to accelerate a large class of image processing operators. Given a low-resolution reference input and output pair, we model the operator by fitting local curves that map the input to the output. We can then produce a full-resolution output by evaluating these low-resolution curves on the full-re...
journal
10.1145/2980179.2982423
null
null
10.1145/2980179.2980239
Rapid, detail-preserving image downscaling
https://doi.org/10.1145/2980179.2980239
[ "Nicolas Weber", "Michael Waechter", "Sandra C. Amend", "Stefan Guthe", "Michael Goesele" ]
Image downscaling is arguably the most frequently used image processing tool. We present an algorithm based on convolutional filters where input pixels contribute more to the output image the more their color deviates from their local neighborhood, which preserves visually important details. In a user study we verify t...
journal
10.1145/2980179.2980239
null
null
10.1145/2980179.2982427
Computational multicopter design
https://doi.org/10.1145/2980179.2982427
[ "Tao Du", "Adriana Schulz", "Bo Zhu", "Bernd Bickel", "Wojciech Matusik" ]
We present an interactive system for computational design, optimization, and fabrication of multicopters. Our computational approach allows non-experts to design, explore, and evaluate a wide range of different multicopters. We provide users with an intuitive interface for assembling a multicopter from a collection of ...
journal
10.1145/2980179.2982427
null
null
10.1145/2980179.2982417
gTangle: a grammar for the procedural generation of tangle patterns
https://doi.org/10.1145/2980179.2982417
[ "Christian Santoni", "Fabio Pellacini" ]
Tangles are a form of structured pen-and-ink 2D art characterized by repeating, recursive patterns. We present a method to procedurally generate tangle drawings, seen as recursively split sets of arbitrary 2D polygons with holes, with anisotropic and non-stationary features. We formally model tangles with group grammar...
journal
10.1145/2980179.2982417
null
null
10.1145/2980179.2980248
Recovering shape and spatially-varying surface reflectance under unknown illumination
https://doi.org/10.1145/2980179.2980248
[ "Rui Xia", "Yue Dong", "Pieter Peers", "Xin Tong" ]
We present a novel integrated approach for estimating both spatially-varying surface reflectance and detailed geometry from a video of a rotating object under unknown static illumination. Key to our method is the decoupling of the recovery of normal and surface reflectance from the estimation of surface geometry. We de...
journal
10.1145/2980179.2980248
null
null
10.1145/2980179.2980226
Sphere-meshes for real-time hand modeling and tracking
https://doi.org/10.1145/2980179.2980226
[ "Anastasia Tkach", "Mark Pauly", "Andrea Tagliasacchi" ]
Modern systems for real-time hand tracking rely on a combination of discriminative and generative approaches to robustly recover hand poses. Generative approaches require the specification of a geometric model. In this paper, we propose a the use of sphere-meshes as a novel geometric representation for real-time genera...
journal
10.1145/2980179.2980226
null
null
10.1145/2980179.2982405
360° video stabilization
https://doi.org/10.1145/2980179.2982405
[ "Johannes Kopf" ]
We present a hybrid 3D-2D algorithm for stabilizing 360° video using a deformable rotation motion model. Our algorithm uses 3D analysis to estimate the rotation between key frames that are appropriately spaced such that the right amount of motion has occurred to make that operation reliable. For the remaining frames, i...
journal
10.1145/2980179.2982405
null
null
10.1145/2980179.2982403
VizGen: accelerating visual computing prototypes in dynamic languages
https://doi.org/10.1145/2980179.2982403
[ "Yuting Yang", "Sam Prestwood", "Connelly Barnes" ]
This paper introduces a novel domain-specific compiler, which translates visual computing programs written in dynamic languages to highly efficient code. We define "dynamic" languages as those such as Python and MATLAB, which feature dynamic typing and flexible array operations. Such language features can be useful for...
journal
10.1145/2980179.2982403
null
null
10.1145/2980179.2980225
Automated view and path planning for scalable multi-object 3D scanning
https://doi.org/10.1145/2980179.2980225
[ "Xinyi Fan", "Linguang Zhang", "Benedict Brown", "Szymon Rusinkiewicz" ]
Demand for high-volume 3D scanning of real objects is rapidly growing in a wide range of applications, including online retailing, quality-control for manufacturing, stop motion capture for 3D animation, and archaeological documentation and reconstruction. Although mature technologies exist for high-fidelity 3D model a...
journal
10.1145/2980179.2980225
null
null
10.1145/2980179.2982444
Authoring directed gaze for full-body motion capture
https://doi.org/10.1145/2980179.2982444
[ "Tomislav Pejsa", "Daniel Rakita", "Bilge Mutlu", "Michael Gleicher" ]
We present an approach for adding directed gaze movements to characters animated using full-body motion capture. Our approach provides a comprehensive authoring solution that automatically infers plausible directed gaze from the captured body motion, provides convenient controls for manual editing, and adds synthetic g...
journal
10.1145/2980179.2982444
null
null
10.1145/2980179.2980223
Action-driven 3D indoor scene evolution
https://doi.org/10.1145/2980179.2980223
[ "Rui Ma", "Honghua Li", "Changqing Zou", "Zicheng Liao", "Xin Tong", "Hao Zhang" ]
We introduce a framework for action-driven evolution of 3D indoor scenes, where the goal is to simulate how scenes are altered by human actions, and specifically, by object placements necessitated by the actions. To this end, we develop an action model with each type of action combining information about one or more hu...
journal
10.1145/2980179.2980223
null
null
10.1145/2980179.2980237
Functionality preserving shape style transfer
https://doi.org/10.1145/2980179.2980237
[ "Zhaoliang Lun", "Evangelos Kalogerakis", "Rui Wang", "Alla Sheffer" ]
When geometric models with a desired combination of style and functionality are not available, they currently need to be created manually. We facilitate algorithmic synthesis of 3D models of man-made shapes which combines user-specified style, described via an exemplar shape, and functionality, encoded by a functionall...
journal
10.1145/2980179.2980237
null
null
10.1145/2980179.2982413
Interactively controlled quad remeshing of high resolution 3D models
https://doi.org/10.1145/2980179.2982413
[ "Hans-Christian Ebke", "Patrick Schmidt", "Marcel Campen", "Leif Kobbelt" ]
Parametrization based methods have recently become very popular for the generation of high quality quad meshes. In contrast to previous approaches, they allow for intuitive user control in order to accommodate all kinds of application driven constraints and design intentions. A major obstacle in practice, however, are ...
journal
10.1145/2980179.2982413
null
null
10.1145/2980179.2980246
Towards foveated rendering for gaze-tracked virtual reality
https://doi.org/10.1145/2980179.2980246
[ "Anjul Patney", "Marco Salvi", "Joohwan Kim", "Anton Kaplanyan", "Chris Wyman", "Nir Benty", "David Luebke", "Aaron Lefohn" ]
Foveated rendering synthesizes images with progressively less detail outside the eye fixation region, potentially unlocking significant speedups for wide field-of-view displays, such as head mounted displays, where target framerate and resolution is increasing faster than the performance of traditional real-time render...
journal
10.1145/2980179.2980246
null
null
10.1145/2980179.2982401
FrameFab: robotic fabrication of frame shapes
https://doi.org/10.1145/2980179.2982401
[ "Yijiang Huang", "Juyong Zhang", "Xin Hu", "Guoxian Song", "Zhongyuan Liu", "Lei Yu", "Ligang Liu" ]
Frame shapes, which are made of struts, have been widely used in many fields, such as art, sculpture, architecture, and geometric modeling, etc. An interest in robotic fabrication of frame shapes via spatial thermoplastic extrusion has been increasingly growing in recent years. In this paper, we present a novel algorit...
journal
10.1145/2980179.2982401
null
null
10.1145/2980179.2980255
Simulating the structure and texture of solid wood
https://doi.org/10.1145/2980179.2980255
[ "Albert Julius Liu", "Zhao Dong", "Miloš Hašan", "Steve Marschner" ]
Wood is an important decorative material prized for its unique appearance. It is commonly rendered using artistically authored 2D color and bump textures, which reproduces color patterns on flat surfaces well. But the dramatic anisotropic specular figure caused by wood fibers, common in curly maple and other species, i...
journal
10.1145/2980179.2980255
null
null
10.1145/2980179.2982429
Efficient rendering of heterogeneous polydisperse granular media
https://doi.org/10.1145/2980179.2982429
[ "Thomas Müller", "Marios Papas", "Markus Gross", "Wojciech Jarosz", "Jan Novák" ]
We address the challenge of efficiently rendering massive assemblies of grains within a forward path-tracing framework. Previous approaches exist for accelerating high-order scattering for a limited, and static, set of granular materials, often requiring scene-dependent precomputation. We significantly expand the admis...
journal
10.1145/2980179.2982429
null
null
10.1145/2980179.2982412
Hyperbolic orbifold tutte embeddings
https://doi.org/10.1145/2980179.2982412
[ "Noam Aigerman", "Yaron Lipman" ]
Tutte's embedding is one of the most popular approaches for computing parameterizations of surface meshes in computer graphics and geometry processing. Its popularity can be attributed to its simplicity, the guaranteed bijectivity of the embedding, and its relation to continuous harmonic mappings. In this work we exten...
journal
10.1145/2980179.2982412
null
null
10.1145/2980179.2982415
Dispersion kernels for water wave simulation
https://doi.org/10.1145/2980179.2982415
[ "José A. Canabal", "David Miraut", "Nils Thuerey", "Theodore Kim", "Javier Portilla", "Miguel A. Otaduy" ]
We propose a method to simulate the rich, scale-dependent dynamics of water waves. Our method preserves the dispersion properties of real waves, yet it supports interactions with obstacles and is computationally efficient. Fundamentally, it computes wave accelerations by way of applying a dispersion kernel as a spatial...
journal
10.1145/2980179.2982415
null
null
10.1145/2980179.2982426
Bounded distortion parametrization in the space of metrics
https://doi.org/10.1145/2980179.2982426
[ "Edward Chien", "Zohar Levi", "Ofir Weber" ]
We present a framework for global parametrization that utilizes the edge lengths (squared) of the mesh as variables. Given a mesh with arbitrary topology and prescribed cone singularities, we flatten the original metric of the surface under strict bounds on the metric distortion (various types of conformal and isometri...
journal
10.1145/2980179.2982426
null
null