Now showing items 24-43 of 49

    • Multi-scale Feature Extraction on Point-Sampled Surfaces 

      Pauly, Mark; Keiser, Richard; Gross, Markus (Blackwell Publishers, Inc and the Eurographics Association, 2003)
      We present a new technique for extracting line-type features on point-sampled geometry. Given an unstructuredpoint cloud as input, our method first applies principal component analysis on local neighborhoods toclassify ...
    • Multiresolution Surface Representation Based on Displacement Volumes 

      Botsch, Mario; Kobbelt, Leif (Blackwell Publishers, Inc and the Eurographics Association, 2003)
      We propose a new representation for multiresolution models which uses volume elements enclosed between thedifferent resolution levels to encode the detail information. Keeping these displacement volumes locally constantduring ...
    • Narrative Use of Sign Language by a Virtual Character for the Hearing Impaired 

      Rieger, Thomas; Braun, Norbert (Blackwell Publishers, Inc and the Eurographics Association, 2003)
      This paper describes the concept and control of a 3d virtual character system with facial expressions and gesturesas a conversational user interface with narrative expressiveness for the hearing impaired. The gestures and ...
    • On Visual Similarity Based 3D Model Retrieval 

      Chen, Ding-Yun; Tian, Xiao-Pei; Shen, Yu-Te; Ouhyoung, Ming (Blackwell Publishers, Inc and the Eurographics Association, 2003)
    • Open Issues in Photo-realistic Rendering 

      Purgathofer, Werner (Blackwell Publishers, Inc and the Eurographics Association, 2003)
      For more than two decades Computer graphics researchers have tried to achieve photo-realism in their images as reliable as possible, mainly by simulating the physical laws of light and adding one effect after the other. ...
    • Out-of-core compression and decompression of large n-dimensional scalar fields 

      Ibarria, Lawrence; Lindstrom, Peter; Rossignac, Jarek; Szymczak, Andrzej (Blackwell Publishers, Inc and the Eurographics Association, 2003)
      We present a simple method for compressing very large and regularly sampled scalar fields. Our method is particularlyattractive when the entire data set does not fit in memory and when the sampling rate is high relative ...
    • Particle-Based Simulation of Fluids 

      Premzoe, Simon; Tasdizen, Tolga; Bigler, James; Lefohn, Aaron; Whitaker, Ross T. (Blackwell Publishers, Inc and the Eurographics Association, 2003)
      Due to our familiarity with how fluids move and interact, as well as their complexity, plausible animation of fluidsremains a challenging problem. We present a particle interaction method for simulating fluids. The ...
    • Planned Sampling of Spatially Varying BRDFs 

      Lensch, Hendrik P.A.; Lang, Jochen; Sa, Asla M.; Seidel, Hans-Peter (Blackwell Publishers, Inc and the Eurographics Association, 2003)
      Measuring reflection properties of a 3D object involves capturing images for numerous viewing and lightingdirections. We present a method to select advantageous measurement directions based on analyzing the estimationof ...
    • Planning Collision-Free Reaching Motions for Interactive Object Manipulation and Grasping 

      Kallmann, Marcelo; Aubel, Amaury; Abaci, Tolga; Thalmann, Daniel (Blackwell Publishers, Inc and the Eurographics Association, 2003)
      We present new techniques that use motion planning algorithms based on probabilistic roadmaps to control 22 degrees of freedom (DOFs) of human-like characters in interactive applications. Our main purpose is the automatic ...
    • Precise Ink Drawing of 3D Models 

      Sousa, Mario Costa; Foster, Kevin; Wyvill, Brian; Samavati, Faramarz (Blackwell Publishers, Inc and the Eurographics Association, 2003)
      Drawings made with precise pen strokes accurately reveal the geometric forms that give subjects their characteristicshape. We present a system for non-photorealistic rendering of precise drawing strokes over dense 3Dtriangle ...
    • Progressive Simplification of Tetrahedral Meshes Preserving All Isosurface Topologies 

      Chiang, Yi-Jen; Lu, Xiang (Blackwell Publishers, Inc and the Eurographics Association, 2003)
      In this paper, we propose a novel technique for constructing multiple levels of a tetrahedral volume dataset whilepreserving the topologies of all isosurfaces embedded in the data. Our simplification technique has two ...
    • Ray Differentials and Multiresolution Geometry Caching for Distribution Ray Tracing in Complex Scenes 

      Christensen, Per H.; Laur, David M.; Fong, Julian; Wooten, Wayne L.; Batali, Dana (Blackwell Publishers, Inc and the Eurographics Association, 2003)
      When rendering only directly visible objects, ray tracing a few levels of specular reflection from large, low-curvaturesurfaces, and ray tracing shadows from point-like light sources, the accessed geometry is coherentand ...
    • Real-Time Caustics 

      Wand, M.; Strasser, W. (Blackwell Publishers, Inc and the Eurographics Association, 2003)
      We present a new algorithm to render caustics. The algorithm discretizes the specular surfaces into samplepoints. Each of the sample points is treated as a pinhole camera that projects an image of the incoming lightonto ...
    • Realistic Animation of Fluid with Splash and Foam 

      Takahashi, Tsunemi; Fujii, Hiroko; Kunimatsu, Atsushi; Hiwada, Kazuhiro; Saito, Takahiro and Tanaka, Ken and Ueki, Heihachi (Blackwell Publishers, Inc and the Eurographics Association, 2003)
      In this paper we describe a method for modeling and rendering dynamic behavior of fluids withsplashes and foam. A particle system is built into a fluid simulation system to represent an ocean wavecresting and spraying over ...
    • Reanimating Faces in Images and Video 

      Blanz, V.; Basso, C.; Poggio, T.; Vetter, T. (Blackwell Publishers, Inc and the Eurographics Association, 2003)
      This paper presents a method for photo-realistic animation that can be applied to any face shown in a single imageor a video. The technique does not require example data of the person's mouth movements, and the image to ...
    • Rendering and Affect 

      Duke, D.J.; Barnard, P.J.; Halper, N.; Mellin, M. (Blackwell Publishers, Inc and the Eurographics Association, 2003)
      Previous studies at the intersection between rendering and psychology have concentrated on issues such as realismand acuity. Although such results have been useful in informing development of realistic rendering ...
    • A Scalable Approach to Interactive Global Illumination 

      Benthin, Carsten; Wald, Ingo; Slusallek, Philipp (Blackwell Publishers, Inc and the Eurographics Association, 2003)
      The addition of global illumination can dramatically increase the realism achievable when rendering virtual environments.In particular with interactive applications we expect the environment to reflect changes in the ...
    • Shadow Volumes on Programmable Graphics Hardware 

      Brabec, Stefan; Seidel, Hans-Peter (Blackwell Publishers, Inc and the Eurographics Association, 2003)
      One of the best choices for fast, high quality shadows is the shadow volume algorithm. However, for real timeapplications the extraction of silhouette edges can significantly burden the CPU, especially with highly ...
    • ShieldTester: Cell-to-Cell Visibility Test for Surface Occluders 

      Navazo, I.; Rossignac, J.; Jou, J.; Shariff, R. (Blackwell Publishers, Inc and the Eurographics Association, 2003)
      We present a novel Cell-To-Cell Visibility (C2CV) algorithm, which given two polyhedra, AandBand a connectedand oriented manifold triangle mesh, S offers a simple, fast and conservative test for detecting when A and B ...
    • Solving Geometric Optimization Problems using Graphics Hardware 

      Denny, Markus (Blackwell Publishers, Inc and the Eurographics Association, 2003)
      We show how to use graphics hardware for tackling optimization problems arising in the field of computationalgeometry. We exemplarily discuss three problems, where combinatorial algorithms are inefficient or hard to ...