SPBG: Symposium on Point Based Graphics: Recent submissions
Now showing items 61-80 of 89
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Normal Estimation for Point Clouds: A Comparison Study for a Voronoi Based Method
(The Eurographics Association, 2005)Many applications that process a point cloud data benefit from a reliable normal estimation step. Given a point cloud presumably sampled from an unknown surface, the problem is to estimate the normals of the surface at the ... -
Progressive Splatting
(The Eurographics Association, 2005)Surface splatting enables high quality and efficient rendering algorithms for dense point-sampled datasets. However, with increasing data complexity, the need for multiresolution models becomes evident. For triangle meshes, ... -
Voronoi Rasterization of Sparse Point Sets
(The Eurographics Association, 2005)Point-based representations are becoming increasingly common in computer graphics, especially for visualizing data sets where the number of points is large relative to the number of pixels involved in their display. When ... -
High-Quality Surface Splatting on Today s GPUs
(The Eurographics Association, 2005)Because of their conceptual simplicity and superior flexibility, point-based geometries evolved into a valuable alternative to surface representations based on polygonal meshes. Elliptical surface splats were shown to allow ... -
Interactive Ray Tracing of Point-based Models
(The Eurographics Association, 2005)Point-based methods have recently gained significant interest, as their simplicity and independence of connectivity make them a simple and powerful tool in both modelling and rendering. Still, their use for high-quality ... -
A Barcode Shape Descriptor for Curve Point Cloud Data
(The Eurographics Association, 2004)In this paper, we present a complete computational pipeline for extracting a compact shape descriptor for curve point cloud data. Our shape descriptor, called a barcode, is based on a blend of techniques from differential ... -
Shape Segmentation and Matching from Noisy Point Clouds
(The Eurographics Association, 2004)We present the implementation results of a shape segmentation technique and an associated shape matching method whose input is a point sample from the shape. The sample is allowed to be noisy in the sense that they may ... -
Finite Elements on Point Based Surfaces
(The Eurographics Association, 2004)framework efficiently and effectively brings well-known PDE-based processing techniques to the field of point-based surfaces. Our method is based on the construction of local tangent planes and a local Delaunay triangulation ... -
Meshing Point Clouds Using Spherical Parameterization
(The Eurographics Association, 2004)We present a simple method for meshing a 3D point cloud to a manifold genus-0 mesh. Our approach is based on recent methods for spherical embedding of planar graphs, where we use instead a k-nearest neighborhood graph of ... -
Topological estimation using witness complexes
(The Eurographics Association, 2004)This paper tackles the problem of computing topological invariants of geometric objects in a robust manner, using only point cloud data sampled from the object. It is now widely recognised that this kind of topological ... -
Bounds on the k-Neighborhood for Locally Uniformly Sampled Surfaces
(The Eurographics Association, 2004)Given a locally uniform sample set P of a smooth surface S. We derive upper and lower bounds on the number k of nearest neighbors of a sample point p that have to be chosen from P such that this neighborhood contains all ... -
On Normals and Projection Operators for Surfaces Defined by Point Sets
(The Eurographics Association, 2004)Levin s MLS projection operator allows defining a surface from a set of points and represents a versatile procedure to generate points on this surface. Practical problems of MLS surfaces are a complicated non-linear ... -
Proximity Graphs for Defining Surfaces over Point Clouds
(The Eurographics Association, 2004)We present a new definition of an implicit surface over a noisy point cloud. It can be evaluated very fast, but, unlike other definitions based on the moving least squares approach, it does not suffer from artifacts. In ... -
The Domain of a Point Set Surface
(The Eurographics Association, 2004)It is useful to be able to define a two-dimensional point-set surface determined by a point cloud. One popular definition is Levin's MLS surface. This surface is defined on a domain which is a three-dimensional subset of ... -
Points Reloaded: Point-Based Rendering Revisited
(The Eurographics Association, 2004)The increasing popularity of points as rendering primitives has led to a variety of different rendering algorithms, and in particular the different implementations compare like apples to oranges. In this paper we revisit ... -
Layered Point Clouds
(The Eurographics Association, 2004)We present a simple point-based multiresolution structure for interactive visualization of very large point sampled models on consumer graphics platforms. The structure is based on a hierarchy of precomputed object-space ... -
Progressive Compression of Point-Sampled Models
(The Eurographics Association, 2004)decomposition of the point set and thus easily allows for progressive decoding. Our method is generic in the sense that it can handle arbitrary point attributes using attribute-specific coding operations. Furthermore, no ... -
Compression of Point-Based 3D Models by Shape-Adaptive Wavelet Coding of Multi-Height Fields
(The Eurographics Association, 2004)In order to efficiently archive and transmit large 3D models, lossy and lossless compression methods are needed. We propose a compression scheme for coordinate data of point-based 3D models of surfaces. A point-based model ... -
Post-processing of Scanned 3D Surface Data
(The Eurographics Association, 2004)3D shape acquisition has become a major tool for creating digital 3D surface data in a variety of application elds. Despite the steady increase in accuracy, most available scanning techniques cause severe scanning artifacts ... -
Uncertainty and Variability in Point Cloud Surface Data
(The Eurographics Association, 2004)We present a framework for analyzing shape uncertainty and variability in point-sampled geometry. Our representation is mainly targeted towards discrete surface data stemming from 3D acquisition devices, where a finite ...