Eurographics Symposium on Point-Based Graphics (2004), pp. 1–6 (2009)
paper46 This paper presents a method for computing shadows on incomplete point-based isosurfaces. Such surfaces are obtained in our setting by a view-dependent isosurface extraction method that...
Topological estimation using witness complexes (2009)
M. Alexa, S. Rusinkiewicz, Vin De Silva, Gunnar Carlsson
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...
M. Alexa, S. Rusinkiewicz, Phong Splatting, Mario Botsch, Michael Spernat, Leif Kobbelt
Surface splatting has developed into a valuable alternative to triangle meshes when it comes to rendering of highly detailed massive datasets. However, even highly accurate splat approximations of...
M. Alexa, S. Rusinkiewicz, Voicu Popescu, Elisha Sacks, Gleb Bahmutov
We are developing a system for interactive modeling of real world scenes. The acquisition device consists of a video camera enhanced with an attached laser system. As the operator sweeps the scene,...
Compression of Point-Based 3D Models by Shape-Adaptive Wavelet Coding of Multi-Height Fields (2008)
M. Alexa, S. Rusinkiewicz, Tilo Ochotta, Dietmar Saupe
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...
Interactive Silhouette Rendering for Point-Based Models (2008)
M. Alexa, S. Rusinkiewicz, Hui Xu, Minh X. Nguyen, Xiaoru Yuan, Baoquan Chen
We present a new method for rendering silhouettes of point-based models. Due to the lack of connectivity information, most existing polygon-based silhouette generation algorithms cannot be applied to...
© The Eurographics Association 2004. Multi-Resolution Sound Rendering (2008)
M. Alexa, S. Rusinkiewicz, W. Straßer
Point-based multi-resolution representations have been used successfully for rendering highly complex three dimensional scenes in real-time. In this paper, we apply this paradigm to sound rendering:...
A Barcode Shape Descriptor for Curve Point Cloud Data (2008)
M. Alexa, S. Rusinkiewicz, Anne Collins, Afra Zomorodian, Gunnar Carlsson, Leonidas Guibas
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...
M. Alexa, S. Rusinkiewicz, Diego Nehab, Philip Shilane
Point sampling is an important intermediate step for a variety of computer graphics applications, and specialized sampling strategies have been developed to satisfy the requirements of each problem....
Interactive Silhouette Rendering for Point-Based Models (2008)
M. Alexa, S. Rusinkiewicz, Hui Xu, Minh X. Nguyen, Xiaoru Yuan, Baoquan Chen
We present a new method for rendering silhouettes of point-based models. Due to the lack of connectivity information, most existing polygon-based silhouette generation algorithms cannot be applied to...
Real-Time Point Cloud Refinement (2008)
M. Alexa, S. Rusinkiewicz, G. Guennebaud, L. Barthe, M. Paulin
Splatting-based rendering techniques are currently the best choice for efficient high quality rendering of pointbased geometries. However, such techniques are not suitable for large magnification,...
Eurographics Symposium on Point-Based Graphics (2004) (2008)
Alexa Rusinkiewicz Editors, M. Alexa, S. Rusinkiewicz, M. Zwicker, C. Gotsman
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...
Eurographics Symposium on Point-Based Graphics (2004) (2008)
Alexa Rusinkiewicz Editors, M. Alexa, S. Rusinkiewicz, U. Clarenz, M. Rumpf, A. Telea
We present a framework for processing point-based surfaces via partial differential equations (PDEs). Our framework efficiently and effectively brings well-known PDE-based processing techniques to...
Eurographics Symposium on Point-Based Graphics (2004) (2007)
Alexa Rusinkiewicz Editors, M. Alexa, S. Rusinkiewicz, Jan Klein, Gabriel Zachmann
a b c d Visualization of the moving least squares surface (magenta) over a 2D point cloud (black dots) based on different distance functions: (a,c) Euclidean, (b,d) ours based on proximity graphs.
A Barcode Shape Descriptor for Curve Point Cloud Data (2007)
M. Alexa, S. Rusinkiewicz, Anne Collins, Afra Zomorodian, Gunnar Carlsson, Leonidas Guibas
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...
Proximity Graphs for Defining Surfaces over Point Clouds (2007)
M. Alexa, S. Rusinkiewicz, Jan Klein, Gabriel Zachmann
a b c d Visualization of the moving least squares surface (magenta) over a 2D point cloud (black dots) based on different distance functions: (a,c) Euclidean, (b,d) ours based on proximity graphs. We...
Progressive Compression of Point-Sampled Models Abstract (2007)
M. Alexa, S. Rusinkiewicz, M. Waschbüsch, M. Gross, F. Eberhard, E. Lamboray, ...
We present a framework for progressive compression of point-sampled models. It is based on a multiresolution decomposition of the point set and thus easily allows for progressive decoding. Our method...
Point-based Surface Rendering with Motion Blur (2007)
M. Alexa, S. Rusinkiewicz, Xin Guan, Klaus Mueller
In this paper we show how to extend point-based surface rendering to illustrate object motion. We do this by first extruding the circular points into ellipsoids, which fill the space traced out by...
On normals and projection operators for surfaces defined by point sets (2004)
M. Alexa, S. Rusinkiewicz, Marc Alexa, Anders Adamson
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...
Proximity Graphs for Defining Surfaces over Point Clouds (2004)
M. Alexa, S. Rusinkiewicz, Jan Klein, Gabriel Zachmann
a b c d Visualization of the moving least squares surface (magenta) over a 2D point cloud (black dots) based on different distance functions: (a,c) Euclidean, (b,d) ours based on proximity graphs.
M. Alexa, S. Rusinkiewicz, Enrico Gobbetti, Fabio Marton
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...
Stratified Point Sampling of 3D Models (2004)
M. Alexa, S. Rusinkiewicz, Diego Nehab, Philip Shilane
Point sampling is an important intermediate step for a variety of computer graphics applications, and specialized sampling strategies have been developed to satisfy the requirements of each problem....
The Domain of a Point Set Surface (2004)
M. Alexa, S. Rusinkiewicz, Nina Amenta, Yong J. Kil
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...