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 functional parts. We propose a novel active learning method capable enriching massive geometric datasets accurate region annotations. Given shape collection user-specified label our goal is to correctly demarcate the corresponding minimal manual work. Our framework achieves this by cycling between...

We present a new globally smooth parameterization method for the triangulated surfaces of arbitrary topology. Given two orthogonal piecewise linear vector fields defined over input mesh (typically estimated principal curvature directions), our computes periodic functions, aligned with fields, by minimizing an objective function. The bivariate function they define is almost everywhere on surface, except in vicinity singular vertices, edges, and triangles, where derivatives vanish. extract...

Many geometry processing applications, such as morphing, shape blending, transfer of texture or material properties, and fitting template meshes to scan data, require a bijective mapping between two more models. This mapping, cross-parameterization , typically needs preserve the features parameterized models, legs legs, ears ears, so on. Most applications also models be represented by compatible meshes, i.e. with identical connectivity, based on cross-parameterization. In this paper we...

Conformal parameterization of mesh models has numerous applications in geometry processing. Conformality is desirable for remeshing, surface reconstruction, and many other processing applications. Subject to the conformality requirement, these typically benefit from parameterizations with smaller stretch. The Angle Based Flattening (ABF) method, presented a few years ago, generates provably valid conformal low However, it quite time-consuming becomes error prone large meshes due numerical...

Parameterization of 3D mesh data is important for many graphics applications, in particular texture mapping, remeshing and morphing. Closed manifold genus-0 meshes are topologically equivalent to a sphere, hence this the natural parameter domain them. Parameterizing triangle onto sphere means assigning position on unit each vertices, such that spherical triangles induced by connectivity not too distorted do overlap. Satisfying non-overlapping requirement most difficult critical component...

We introduce a purely passive facial capture approach that uses only an array of video cameras, but requires no template geometry, special makeup or markers, and active lighting. obtain initial geometry using multi-view stereo, then use novel for automatically tracking texture detail across the frames. As result, we high-resolution sequence compatibly triangulated parameterized meshes. The resulting can be rendered with dynamically captured textures, while also consistently applying changes...

Abstract Modeling dressed characters is known as a very tedious process. It usually requires specifying 2D fabric patterns, positioning and assembling the min 3D, then performing physically‐based simulation. The latter accounts for gravity collisions to compute rest shape of garment, with adequate folds wrinkles. This paper presents more intuitive way design virtual clothing. We start sketching system in which user draws contours seam‐lines garment directly on mannequin. Our converts sketch...

Parameterization of 3D mesh data is important for many graphics applications, in particular texture mapping, remeshing and morphing. Closed manifold genus-0 meshes are topologically equivalent to a sphere, hence this the natural parameter domain them. Parameterizing triangle onto sphere means assigning position on unit each vertices, such that spherical triangles induced by connectivity not too distorted do overlap. Satisfying non-overlapping requirement most difficult critical component...

Mesh parameterization is a powerful geometry processing tool with numerous computer graphics applications, from texture mapping to animation transfer. This course outlines its mathematical foundations, describes recent methods for parameterizing meshes over various domains, discusses emerging tools like global and inter-surface mapping, demonstrates variety of applications.

Fascinating and elegant shapes may be folded from a single planar sheet of material without stretching, tearing or cutting, if one incorporates curved folds into the design. We present an optimization-based computational framework for design digital reconstruction surfaces which can produced by folding. Our work not only contributes to applications in architecture industrial design, but it also provides new way study complex largely unexplored phenomena arising

A lot of research has recently focused on the problem capturing geometry and motion garments. Such work usually relies special markers printed fabric to establish temporally coherent correspondences between points garment's surface at different times. Unfortunately, this approach is tedious prevents capture off-the-shelf clothing made from interesting fabrics. In paper, we describe a marker-free garment that avoids these downsides. We parameterizations incomplete geometries extract each...

True2Form is a sketch-based modeling system that reconstructs 3D curves from typical design sketches. Our approach to infer form 2D drawings novel mathematical framework of insights derived perception and literature. We note designers favor viewpoints maximally reveal shape information, strategically sketch descriptive convey intrinsic properties, such as curvature, symmetry, or parallelism. Studies indicate viewers apply these properties selectively envision globally consistent shape. mimic...

Abstract Non‐rigid 3D shape correspondence is a fundamental and difficult problem. Most applications which require rely on manually selected markers. Without user assistance, the performances of existing automatic methods depend strongly good initial alignment or prior, they generally do not tolerate large variations. We present an feature algorithm capable handling large, non‐rigid variations, as well partial matching. This made possible by leveraging power state‐of‐the‐art mesh deformation...

Humans usually associate an upright orientation with objects, placing them in a way that they are most commonly seen our surroundings. While it is open challenge to recover the functionality of shape from its geometry alone, this paper shows often possible infer by analyzing geometry. Our key idea reduce two-dimensional (spherical) space small set candidates using functionality-related geometric properties object, and then determine best assessment function several functional attributes...

Abstract While hexahedral mesh elements are preferred by a variety of simulation techniques, constructing quality all‐hex meshes general shapes remains challenge. An attractive hex‐meshing approach, often referred to as sub‐mapping, uses low distortion mapping between the input model and PolyCube (a solid formed from union cubes), transfer regular hex grid model. Unfortunately, construction suitable PolyCubes corresponding volumetric maps for arbitrary an open problem. Our work introduces...

We present a fully automatic method for design-preserving transfer of garments between characters with different body shapes. For real-life garments, such is performed through knowledge intensive and time consuming process, known as pattern grading . Our first contribution to reformulate the criteria used in professional pattern-grading set geometric requirements, respectively expressing shape or design preservation, proportionality, fit. then propose garment algorithm which satisfies all...

Designers frequently reuse existing designs as a starting point for creating new garments. In order to apply garment modifications, which the designer envisions in 3D, tools require meticulous manual editing of 2D patterns. These edits need account both envisioned geometric changes 3D shape, well various physical factors that affect look draped garment. We propose framework allows designers directly they envision space; and creates patterns replicate this target geometry when lifted into via...

In this article, we provide a detailed survey of techniques for hexahedral mesh generation. We cover the whole spectrum alternative approaches to generation, as well post-processing algorithms connectivity editing and optimization. For each technique, highlight capabilities limitations, also pointing out associated unsolved challenges. Recent relaxed approaches, aiming generate not pure-hex but hex-dominant meshes, are discussed. The required background, pertaining geometrical combinatorial...

Resizing of 3D models can be very useful when creating new or placing inside different scenes. However, uniform scaling is limited in its applicability while straightforward non-uniform destroy features and lead to serious visual artifacts. Our goal define a method that protects model structures during resizing. We observe typically, some parts the are more vulnerable than others, undergoing undesirable deformation. automatically detect regions carry this information protective grid defined...

Man-made objects are ubiquitous in the real world and virtual environments. While such can be very detailed, capturing every small feature, they often identified characterized by a set of defining curves. Compact, abstracted shape descriptions based on curves visually more appealing than original models, which appear to cluttered. We introduce novel algorithm for abstracting three-dimensional geometric models using characteristic or contours as building blocks abstraction. Our method...