Latest in cs.gr

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A Cheeger type inequality in finite Cayley sum graphsJul 17 2019Let $G$ be a finite group and $S$ be a symmetric generating set of $G$ with $|S| = d$. We show that if the undirected Cayley sum graph $C_{\Sigma}(G,S)$ is an expander graph and is non-bipartite, then the spectrum of its normalised adjacency operator ... More
The Effect of Data Transformations on Scalar Field Topological Analysis of High-Order FEM SolutionsJul 16 2019High-order finite element methods (HO-FEM) are gaining popularity in the simulation community due to their success in solving complex flow dynamics. There is an increasing need to analyze the data produced as output by these simulations. Simultaneously, ... More
RayTracer.jl: A Differentiable Renderer that supports Parameter Optimization for Scene ReconstructionJul 16 2019In this paper, we present RayTracer.jl, a renderer in Julia that is fully differentiable using source-to-source Automatic Differentiation (AD). This means that RayTracer not only renders 2D images from 3D scene parameters, but it can be used to optimize ... More
Graphs with large girth and free groupsJul 16 2019We use Margulis' construction together with lattice counting arguments to build Cayley graphs on $\mathrm{SL}_{2}\left(\mathbb{F}_{p}\right),\;p\to\infty$ which are d-regular graphs with girth $\geq\frac{2}{3}\frac{\ln\left(n\right)}{\ln\left(d-1\right)+\ln\left(C\right)}$ ... More
Towards Robust Direction Invariance in Character AnimationJul 15 2019In character animation, direction invariance is a desirable property. That is, a pose facing north and the same pose facing south are considered the same; a character that can walk to the north is expected to be able to walk to the south in a similar ... More
Brans-Dicke Scalar Field Cosmological Model in Lyra's GeometryJul 14 2019In this paper, we have developed a new cosmological model in Einstein's modified gravity theory using two types of modification.(i) Geometrical modification, in which we have used Lyra's geometry in the left hand side of the Einstein field equations (EFE) ... More
The automorphism groups of some token graphsJul 13 2019Jul 18 2019In this paper we obtain the automorphism groups of the token graphs of some graphs. In particular we obtain the automorphism group of the $k$-token graph of the path graph $P_n$, for $n\neq 2k$. Also, we obtain the automorphism group of the $2$-token ... More
The automorphism groups of some token graphsJul 13 2019In this paper we obtain the automorphism group of the token graphs of some graphs. In particular we obtain the automorphism group of the $k$-token graph of the path graph $P_n$, for $n\neq 2k$. Also, we obtain the automorphism group of the $2$-token graph ... More
Coloring invariants of knots and links are often intractableJul 13 2019Let $G$ be a nonabelian, simple group with a nontrivial conjugacy class $C \subseteq G$. Let $K$ be a diagram of an oriented knot in $S^3$, thought of as computational input. We show that for each such $G$ and $C$, the problem of counting homomorphisms ... More
Improving the Projection of Global Structures in Data through Spanning TreesJul 12 2019The connection of edges in a graph generates a structure that is independent of a coordinate system. This visual metaphor allows creating a more flexible representation of data than a two-dimensional scatterplot. In this work, we present STAD (Spanning ... More
Tiny-Inception-ResNet-v2: Using Deep Learning for Eliminating Bonded Labors of Brick Kilns in South AsiaJul 12 2019This paper proposes to employ a Inception-ResNet inspired deep learning architecture called Tiny-Inception-ResNet-v2 to eliminate bonded labor by identifying brick kilns within "Brick-Kiln-Belt" of South Asia. The framework is developed by training a ... More
Void-and-Cluster Sampling of Large Scattered Data and TrajectoriesJul 11 2019We propose a data reduction technique for scattered data based on statistical sampling. Our void-and-cluster sampling technique finds a representative subset that is optimally distributed in the spatial domain with respect to the blue noise property. ... More
Probabilistic finiteness properties for profinite groupsJul 11 2019We introduce a probabilistic version of the $\mathrm{FP}_n$ property for profinite groups, called $\mathrm{PFP}_n$, using the notion of positively finitely generated modules. We further define and study related properties such as positive finite presentability. ... More
Video Distortion Method for VMAF Quality Values IncreasingJul 10 2019Video quality measurement takes an important role in many applications. Full-reference quality metrics which are usually used in video codecs comparisons are expected to reflect any changes in videos. In this article, we consider different colour corrections ... More
Characterizations of nested GVZ-groups by central seriesJul 10 2019Many properties of groups can be defined by the existence of a particular normal series. The classic examples being solvability, supersolvability and nilpotence. Among the nilpotent groups are the so-called nested GVZ-groups --- groups where the centers ... More
Gravitational-wave parameter estimation with gaps in LISA: a Bayesian data augmentation methodJul 10 2019By listening to gravity in the low frequency band, between 0.1 mHz and 1 Hz, the future space-based gravitational-wave observatory LISA will be able to detect tens of thousands of astrophysical sources from cosmic dawn to the present. The detection and ... More
Non-Smooth Newton Methods for Deformable Multi-Body DynamicsJul 10 2019We present a framework for the simulation of rigid and deformable bodies in the presence of contact and friction. Our method is based on a non-smooth Newton iteration that solves the underlying nonlinear complementarity problems (NCPs) directly. This ... More
Progressive Wasserstein Barycenters of Persistence DiagramsJul 10 2019This paper presents an efficient algorithm for the progressive approximation of Wasserstein barycenters of persistence diagrams, with applications to the visual analysis of ensemble data. Given a set of scalar fields, our approach enables the computation ... More
Shadow Accrual Maps: Efficient Accumulation of City-Scale Shadows Over TimeJul 09 2019Large scale shadows from buildings in a city play an important role in determining the environmental quality of public spaces. They can be both beneficial, such as for pedestrians during summer, and detrimental, by impacting vegetation and by blocking ... More
Prescription AR: A Fully-Customized Prescription-Embedded Augmented Reality DisplayJul 09 2019In this paper, we present a fully-customized AR display design that considers the user's prescription, interpupillary distance, and taste of fashion. A free-form image combiner embedded inside the prescription lens provides augmented images onto the vision-corrected ... More
Progressive Refinement ImagingJul 09 2019This paper presents a novel technique for progressive online integration of uncalibrated image sequences with substantial geometric and/or photometric discrepancies into a single, geometrically and photometrically consistent image. Our approach can handle ... More
Efficient Cloth Simulation using Miniature Cloth and Upscaling Deep Neural NetworksJul 09 2019Cloth simulation requires a fast and stable method for interactively and realistically visualizing fabric materials using computer graphics. We propose an efficient cloth simulation method using miniature cloth simulation and upscaling Deep Neural Networks ... More
Barriers towards no-reference metrics application to compressed video quality analysis: on the example of no-reference metric NIQEJul 08 2019This paper analyses the application of no-reference metric NIQE to the task of video-codec comparison. A number of issues in the metric behaviour on videos was detected and described. The metric has outlying scores on black and solid-coloured frames. ... More
Right-angled Artin groups and enhanced Koszul propertiesJul 08 2019Let F be a finite field. We prove that the cohomology algebra with coefficients in F of a right-angled Artin group is a strongly Koszul algebra for every finite graph {\Gamma}. Moreover, the same algebra is a universally Koszul algebra if, and only if, ... More
Right-angled Artin groups and enhanced Koszul propertiesJul 08 2019Jul 15 2019Let F be a finite field. We prove that the cohomology algebra with coefficients in F of a right-angled Artin group is a strongly Koszul algebra for every finite graph ${\Gamma}$. Moreover, the same algebra is a universally Koszul algebra if, and only ... More
Learning Structural Graph Layouts and 3D Shapes for Long Span Bridges 3D ReconstructionJul 08 2019A learning-based 3D reconstruction method for long-span bridges is proposed in this paper. 3D reconstruction generates a 3D computer model of a real object or scene from images, it involves many stages and open problems. Existing point-based methods focus ... More
Homogeneity of torsion-free hyperbolic groupsJul 07 2019We give a complete characterization of torsion-free hyperbolic groups which are homogeneous in the sense of first-order logic, in terms of the JSJ decompositions of their free factors.
Fast Universal Style Transfer for Artistic and Photorealistic RenderingJul 06 2019Universal style transfer is an image editing task that renders an input content image using the visual style of arbitrary reference images, including both artistic and photorealistic stylization. Given a pair of images as the source of content and the ... More
Co-DesignMR: A MR-based Interactive Workstation Design System Supporting CollaborationJul 06 2019Jul 09 2019Digital prototyping and evaluation using 3D modeling and digital human models are becoming more practical for customizing products to the preference of a user. However, the 3D modeling is less accessible to casual users, and digital human models suffer ... More
The Algebra of an Age for Metrically Homogeneous Graphs of Generic TypeJul 05 2019Metrically homogeneous graphs are connected graphs which, when endowed with the path metric, are homogeneous as metric spaces. Here we consider a class of countable metrically homogeneous graphs. The algebra of an age is a concept introduced by Cameron ... More
Two-dimensional twistor manifolds and Teukolsky operatorsJul 04 2019The Teukolsky equations are currently the leading approach for analysing stability of linear massless fields propagating in rotating black holes. It has recently been shown that the geometry of these equations can be understood in terms of a connection ... More
EVA: Generating Emotional Behavior of Virtual Agents using Expressive Features of Gait and GazeJul 03 2019We present a novel, real-time algorithm, EVA, for generating virtual agents with various perceived emotions. Our approach is based on using Expressive Features of gaze and gait to convey emotions corresponding to happy, sad, angry, or neutral. We precompute ... More
Tranquil Clouds: Neural Networks for Learning Temporally Coherent Features in Point CloudsJul 03 2019Point clouds, as a form of Lagrangian representation, allow for powerful and flexible applications in a large number of computational disciplines. We propose a novel deep-learning method to learn stable and temporally coherent feature spaces for points ... More
Holonomy groups of compact flat solvmanifoldsJul 03 2019This article is concerned with the study of the holonomy group of flat solvmanifolds. It is known that the holonomy group of a flat solvmanifold is abelian; we give an elementary proof of this fact and moreover we prove that any finite abelian group is ... More
City-GAN: Learning architectural styles using a custom Conditional GAN architectureJul 03 2019Generative Adversarial Networks (GANs) are a well-known technique that is trained on samples (e.g. pictures of fruits) and which after training is able to generate realistic new samples. Conditional GANs (CGANs) additionally provide label information ... More
RadVR: A 6DOF Virtual Reality Daylighting Analysis ToolJul 02 2019This work introduces RadVR, a virtual reality daylighiting analysis tools, that simultaneously allows the analysis of qualitative immersive renderings and the assessment of quantitative data of physically correct daylighting simulations in a 6DOF virtual ... More
A hp-adaptive discontinuous Galerkin solver for elliptic equations in numerical relativityJul 02 2019A considerable amount of attention has been given to discontinuous Galerkin methods for hyperbolic problems in numerical relativity, showing potential advantages of the methods in dealing with hydrodynamical shocks and other discontinuities. This paper ... More
Going Deeper with Point NetworksJul 01 2019In this work, we introduce three generic point cloud processing blocks that improve both accuracy and memory consumption of state-of-the-art networks thus allowing to design deeper and more accurate networks. The novel processing blocks are: a multi-resolution ... More
Computational Design of Skinned Quad-RobotsJul 01 2019We present a computational design system that assists users to model, optimize, and fabricate quad-robots with soft skins.Our system addresses the challenging task of predicting their physical behavior by fully integrating the multibody dynamics of the ... More
XNect: Real-time Multi-person 3D Human Pose Estimation with a Single RGB CameraJul 01 2019We present a real-time approach for multi-person 3D motion capture at over 30 fps using a single RGB camera. It operates in generic scenes and is robust to difficult occlusions both by other people and objects. Our method operates in subsequent stages. ... More
FastDVDnet: Towards Real-Time Video Denoising Without Explicit Motion EstimationJul 01 2019In this paper, we propose a state-of-the-art video denoising algorithm based on a convolutional neural network architecture. Until recently, video denoising with neural networks had been a largely under explored domain, and existing methods could not ... More
Automatic reconstruction of fully volumetric 3D building models from point cloudsJul 01 2019We present a novel method for reconstructing parametric, volumetric, multi-story building models from unstructured, unfiltered indoor point clouds by means of solving an integer linear optimization problem. Our approach overcomes limitations of previous ... More
Learning to Approximate Directional Fields Defined over 2D PlanesJul 01 2019Reconstruction of directional fields is a need in many geometry processing tasks, such as image tracing, extraction of 3D geometric features, and finding principal surface directions. A common approach to the construction of directional fields from data ... More
Geodesic Centroidal Voronoi Tessellations: Theories, Algorithms and ApplicationsJul 01 2019Nowadays, big data of digital media (including images, videos and 3D graphical models) are frequently modeled as low-dimensional manifold meshes embedded in a high-dimensional feature space. In this paper, we summarized our recent work on geodesic centroidal ... More
FVA: Modeling Perceived Friendliness of Virtual Agents Using Movement CharacteristicsJun 30 2019We present a new approach for improving the friendliness and warmth of a virtual agent in an AR environment by generating appropriate movement characteristics. Our algorithm is based on a novel data-driven friendliness model that is computed using a user-study ... More
Isomorphism problems for tensors, groups, and cubic forms: completeness and reductionsJun 30 2019In this paper we consider the problems of testing isomorphism of tensors, $p$-groups, cubic forms, algebras, and more, which arise from a variety of areas, including machine learning, group theory, and cryptography. These problems can all be cast as orbit ... More
Deep Sketch-Based Modeling of Man-Made ShapesJun 28 2019Sketch-based modeling aims to model 3D geometry using a concise and easy to create---but extremely ambiguous---input: artist sketches. Most conventional sketch-based modeling systems target smooth shapes and, to counter the ambiguity, put manually-designed ... More
On spherical unitary representations of groups of spheromorphisms of Bruhat--Tits treesJun 28 2019Consider an infinite homogeneous tree $T_n$ of valence $n+1$, its group $Aut(T_n)$ of automorphisms, and the group $Hie(T_n)$ of its spheromorphisms (hierarchomorphisms), i.~e., the group of homeomorphisms of the boundary of $T_n$ that locally coincide ... More
On divisible design Cayley graphsJun 28 2019We present a construction that gives an infinite series of divisible design graphs which are Cayley graphs.
Efficient Spatial Anti-Aliasing Rendering for Line Joins on Vector MapsJun 27 2019The spatial anti-aliasing technique for line joins (intersections of the road segments) on vector maps is exclusively crucial to visual experience and system performance. Due to limitations of OpenGL API, one common practice to achieve the anti-aliased ... More
Variational Shape Completion for Virtual Planning of Jaw Reconstructive SurgeryJun 27 2019Jul 11 2019The premorbid geometry of the mandible is of significant relevance in jaw reconstructive surgeries and occasionally unknown to the surgical team. In this paper, an optimization framework is introduced to train deep models for completion (reconstruction) ... More
Variational Shape Completion for Virtual Planning of Jaw Reconstructive SurgeryJun 27 2019Jul 15 2019The premorbid geometry of the mandible is of significant relevance in jaw reconstructive surgeries and occasionally unknown to the surgical team. In this paper, an optimization framework is introduced to train deep models for completion (reconstruction) ... More
Variational Mandible Shape Completion for Virtual Surgical PlanningJun 27 2019The premorbid geometry of the mandible is of significant relevance in jaw reconstructive surgeries and occasionally unknown to the surgical team. In this paper, an optimization framework is introduced to train deep models for completion (reconstruction) ... More
HEMELB Acceleration and Visualization for Cerebral AneurysmsJun 27 2019A weakness in the wall of a cerebral artery causing a dilation or ballooning of the blood vessel is known as a cerebral aneurysm. Optimal treatment requires fast and accurate diagnosis of the aneurysm. HemeLB is a fluid dynamics solver for complex geometries ... More
On the discrete Christoffel symbolsJun 27 2019Piecewise flat space-time is equipped with a set of edge lengths and vertex coordinates. This allows us to define a piecewise affine metric, the discrete analogue of the unique torsion-free metric-compatible Levi-Civita affine connection (or the Christoffel ... More
DVP: Data Visualization PlatformJun 27 2019We identify two major steps in data analysis, data exploration for understanding and observing patterns/relationships in data; and construction, design and assessment of various models to formalize these relationships. For each step, there exists a large ... More
Optimizing for Aesthetically Pleasing Quadrotor Camera MotionJun 27 2019In this paper we first contribute a large scale online study (N=400) to better understand aesthetic perception of aerial video. The results indicate that it is paramount to optimize smoothness of trajectories across all keyframes. However, for experts ... More
Flexible SVBRDF Capture with a Multi-Image Deep NetworkJun 27 2019Empowered by deep learning, recent methods for material capture can estimate a spatially-varying reflectance from a single photograph. Such lightweight capture is in stark contrast with the tens or hundreds of pictures required by traditional optimization-based ... More
A Convolutional Decoder for Point Clouds using Adaptive Instance NormalizationJun 27 2019Automatic synthesis of high quality 3D shapes is an ongoing and challenging area of research. While several data-driven methods have been proposed that make use of neural networks to generate 3D shapes, none of them reach the level of quality that deep ... More
A sharp upper bound for the size of Lusztig seriesJun 26 2019Jul 14 2019The paper is concerned with the character theory of finite groups of Lie type. The set of irreducible characters of a group $G$ of Lie type is partitioned into the Lusztig series. We determine the maximum of the sizes of such series for classical groups ... More
ORRB -- OpenAI Remote Rendering BackendJun 26 2019We present the OpenAI Remote Rendering Backend (ORRB), a system that allows fast and customizable rendering of robotics environments. It is based on the Unity3d game engine and interfaces with the MuJoCo physics simulation library. ORRB was designed with ... More
Joint Multi-frame Detection and Segmentation for Multi-cell TrackingJun 26 2019Tracking living cells in video sequence is difficult, because of cell morphology and high similarities between cells. Tracking-by-detection methods are widely used in multi-cell tracking. We perform multi-cell tracking based on the cell centroid detection, ... More
Structural Design Using Laplacian ShellsJun 25 2019We introduce a method to design lightweight shell objects that are structurally robust under the external forces they may experience during use. Given an input 3D model and a general description of the external forces, our algorithm generates a structurally-sound ... More
Interactive Subspace Exploration on Generative Image ModellingJun 24 2019Generative image modeling techniques such as GAN demonstrate highly convincing image generation result. However, user interaction is often necessary to obtain the desired results. Existing attempts add interactivity but require either tailored architectures ... More
Interactive Subspace Exploration on Generative Image ModellingJun 24 2019Jun 27 2019Generative image modeling techniques such as GAN demonstrate highly convincing image generation result. However, user interaction is often necessary to obtain the desired results. Existing attempts add interactivity but require either tailored architectures ... More
ZomeFab: Cost-effective Hybrid Fabrication with ZometoolsJun 24 2019In recent years, personalized fabrication has received considerable attention because of the widespread use of consumer-level three-dimensional (3D) printers. However, such 3D printers have drawbacks, such as long production time and limited output size, ... More
ZomeFab: Cost-effective Hybrid Fabrication with ZometoolsJun 24 2019Jul 07 2019In recent years, personalized fabrication has received considerable attention because of the widespread use of consumer-level three-dimensional (3D) printers. However, such 3D printers have drawbacks, such as long production time and limited output size, ... More
Gaze-Contingent Ocular Parallax Rendering for Virtual RealityJun 24 2019Immersive computer graphics systems strive to generate perceptually realistic user experiences. Current-generation virtual reality (VR) displays are successful in accurately rendering many perceptually important effects, including perspective, disparity, ... More
Irreducibility of the Wysiwyg representations of Thompson's groupsJun 23 2019We prove irreducibility and mutual inequivalence for certain unitary representations of R. Thompson's groups F and T.
On Schur Rings over Infinite Groups IIIJun 22 2019In the paper, we develop further the properties of Schur rings over infinite groups, with particular emphasis on the virtually cyclic group $\Z\times\Z_p$. We provide structure theorems for primitive sets in these Schur rings. In the case of Fermat and ... More
On Schur Rings over Infinite Groups IIIJun 22 2019Jul 08 2019In the paper, we develop further the properties of Schur rings over infinite groups, with particular emphasis on the virtually cyclic group $\mathcal{Z}\times\mathcal{Z}_p$. We provide structure theorems for primitive sets in these Schur rings. In the ... More
TopoLines: Topological Smoothing for Line ChartsJun 22 2019Line charts are commonly used to visualize a series of data samples. When the data are noisy, smoothing is applied to make the signal more apparent. However, the difference between signal and noise is ill-defined, as it depends upon the application domain ... More
On edge-primitive graphs with soluble edge-stabilizersJun 22 2019A graph is edge-primitive if its automorphism group acts primitively on the edge set, and 2-arc-transitive if its automorphism group acts transitively on the set of 2-arcs. In this paper, we present a classification for those edge-primitive graphs which ... More
Dynamical zeta functions of Reidemeister type and representations spacesJun 21 2019In this paper we continue to study the Reidemeister zeta function. We prove P\'olya -- Carlson dichotomy between rationality and a natural boundary for analytic behavior of the Reidemeister zeta function for a large class of automorphisms of Abelian groups. ... More
Multisymplectic actions of compact Lie groups on spheresJun 20 2019We give a geometric description of the obstruction to the existence of homotopy comoment maps in multisymplectic geometry. We apply this description to determine the existence of comoments for multisymplectic compact group actions on spheres and provide ... More
A decision-support method for information inconsistency resolution in direct modeling of CAD modelsJun 20 2019Direct modeling is a very recent CAD paradigm that can provide unprecedented modeling flexibility. It, however, lacks the parametric capability, which is indispensable to modern CAD systems. For direct modeling to have this capability, an additional associativity ... More
Camouflage Design of Analysis Based on HSV Color Statistics and K-means ClusteringJun 19 2019Since ancient times, it has been essential to adopting camouflage on the battlefield, whether it is in the forefront, in-depth or the rear. The traditional evaluation method is made up of people opinion. By watching target or looking at the pictures, ... More
Group-theoretic generalisations of vertex and edge connectivitiesJun 19 2019Jun 25 2019Let $p$ be an odd prime. Let $P$ be a finite $p$-group of class $2$ and exponent $p$, whose commutator quotient $P/[P,P]$ is of order $p^n$. We define two parameters for $P$ related to central decompositions. The first parameter, $\kappa(P)$, is the smallest ... More
Analytical Derivatives for Differentiable Renderer: 3D Pose Estimation by Silhouette ConsistencyJun 19 2019Differentiable render is widely used in optimization-based 3D reconstruction which requires gradients from differentiable operations for gradient-based optimization. The existing differentiable renderers obtain the gradients of rendering via numerical ... More
Neural Volumes: Learning Dynamic Renderable Volumes from ImagesJun 18 2019Modeling and rendering of dynamic scenes is challenging, as natural scenes often contain complex phenomena such as thin structures, evolving topology, translucency, scattering, occlusion, and biological motion. Mesh-based reconstruction and tracking often ... More
Conditional Parallel CoordinatesJun 18 2019Parallel Coordinates are a popular data visualization technique for multivariate data. Dating back to as early as 1880 PC are nearly as old as John Snow's famous cholera outbreak map of 1855, which is frequently regarded as a historic landmark for modern ... More
3D Geometric salient patterns analysis on 3D meshesJun 18 2019Pattern analysis is a wide domain that has wide applicability in many fields. In fact, texture analysis is one of those fields, since the texture is defined as a set of repetitive or quasi-repetitive patterns. Despite its importance in analyzing 3D meshes, ... More
Active Scene Understanding via Online Semantic ReconstructionJun 18 2019We propose a novel approach to robot-operated active understanding of unknown indoor scenes, based on online RGBD reconstruction with semantic segmentation. In our method, the exploratory robot scanning is both driven by and targeting at the recognition ... More
DeepView: View Synthesis with Learned Gradient DescentJun 18 2019We present a novel approach to view synthesis using multiplane images (MPIs). Building on recent advances in learned gradient descent, our algorithm generates an MPI from a set of sparse camera viewpoints. The resulting method incorporates occlusion reasoning, ... More
Topologically robust CAD model generation for structural optimisationJun 17 2019Computer-aided design (CAD) models play a crucial role in the design, manufacturing and maintenance of products. Therefore, the mesh-based finite element descriptions common in structural optimisation must be first translated into CAD models. Currently, ... More
Pi-surfaces: products of implicit surfaces towards constructive composition of 3D objectsJun 16 2019Implicit functions provide a fundamental basis to model 3D objects, no matter they are rigid or deformable, in computer graphics and geometric modeling. This paper introduces a new constructive scheme of implicitly-defined 3D objects based on products ... More
scenery -- Flexible Virtual Reality Visualisation on the Java VMJun 16 2019Life science today involves computational analysis of a large amount and variety of data, such as volumetric data acquired by state-of-the-art microscopes, or mesh data resulting from analysis of such data or simulations. Visualisation is often the first ... More
Blind Image Deblurring Using Patch-Wise Minimal Pixels RegularizationJun 16 2019Blind image deblurring is a long standing challenging problem in image processing and low-level vision. This work proposes an efficient and effective blind deblurring method, which utilizes a novel sparsity prior of local minimal pixels, namely patch-wise ... More
Blind Image Deblurring Using Patch-Wise Minimal Pixels RegularizationJun 16 2019Jul 05 2019Blind image deblurring is a long standing challenging problem in image processing and low-level vision. This work proposes an efficient and effective blind deblurring method, which utilizes a novel sparsity prior of local minimal pixels, namely patch-wise ... More
A Statistical View on Synthetic Aperture Imaging for Occlusion RemovalJun 15 2019Synthetic apertures find applications in many fields, such as radar, radio telescopes, microscopy, sonar, ultrasound, LiDAR, and optical imaging. They approximate the signal of a single hypothetical wide aperture sensor with either an array of static ... More
Image-based 3D Object Reconstruction: State-of-the-Art and Trends in the Deep Learning EraJun 15 2019Jun 18 20193D reconstruction is a longstanding ill-posed problem, which has been explored for decades by the computer vision, computer graphics, and machine learning communities. Since 2015, image-based 3D reconstruction using convolutional neural networks (CNN) ... More
Volumetric Isosurface Rendering with Deep Learning-Based Super-ResolutionJun 15 2019Rendering an accurate image of an isosurface in a volumetric field typically requires large numbers of data samples. Reducing the number of required samples lies at the core of research in volume rendering. With the advent of deep learning networks, a ... More
A Survey on Deep Learning Architectures for Image-based Depth ReconstructionJun 14 2019Estimating depth from RGB images is a long-standing ill-posed problem, which has been explored for decades by the computer vision, graphics, and machine learning communities. In this article, we provide a comprehensive survey of the recent developments ... More
The Replica Dataset: A Digital Replica of Indoor SpacesJun 13 2019We introduce Replica, a dataset of 18 highly photo-realistic 3D indoor scene reconstructions at room and building scale. Each scene consists of a dense mesh, high-resolution high-dynamic-range (HDR) textures, per-primitive semantic class and instance ... More
RodSteward: A Design-to-Assembly System for Fabrication using 3D-Printed Joints and Precision-Cut RodsJun 13 2019We present RodSteward, a design-to-assembly system for creating furniture-scale structures composed of 3D printed joints and precision-cut rods. The RodSteward systems consists of: RSDesigner, a fabrication-aware design interface that visualizes accurate ... More
The Orbital Lense-Thirring Precession in a Strong FieldJun 12 2019We study the exact evolution of the orbital angular momentum of a massive particle in the gravitational field of a Kerr black hole. We show analytically that, for a wide class of orbits, the angular momentum's hodograph is always close to a circle. This ... More
VIPER: Volume Invariant Position-based Elastic RodsJun 12 2019We extend the formulation of position-based rods to include elastic volumetric deformations. We achieve this by introducing an additional degree of freedom per vertex -- isotropic scale (and its velocity). Including scale enriches the space of possible ... More
Estimating Homogeneous Data-driven BRDF Parameters from a Reflectance Map under Known Natural LightingJun 11 2019In this paper we demonstrate robust estimation of the model parameters of a fully-linear data-driven BRDF model from a reflectance map under known natural lighting. To regularize the estimation of the model parameters, we leverage the reflectance similarities ... More
Multi-Resolution Rendering for Computationally Expensive Lighting EffectsJun 11 2019Many lighting methods used in computer graphics such as indirect illumination can have very high computational costs and need to be approximated for real-time applications. These costs can be reduced by means of upsampling techniques which tend to introduce ... More
Blue-noise sampling for human retinal cone spatial distribution modelingJun 11 2019This paper proposes a novel method for modeling human retinal cone distribution. It is based on Blue-noise sampling algorithms that share interesting properties with the sampling performed by the mosaic formed by cone photoreceptors in the retina. Here ... More