Search Results

Now showing 1 - 10 of 90
  • Item
    Real-Time Shape Editing using Radial Basis Functions
    (The Eurographics Association and Blackwell Publishing, Inc, 2005) Botsch, Mario; Kobbelt, Leif
  • Item
    An Efficient Information Hiding Algorithm for Polygon Models
    (The Eurographics Association and Blackwell Publishing, Inc, 2005) Wang, Chung-Ming; Cheng, Yu-Ming
  • Item
    A New Interpolatory Subdivision for Quadrilateral Meshes
    (The Eurographics Association and Blackwell Publishing Ltd., 2005) Li, G.; Ma, W.; Bao, H.
    This paper presents a new interpolatory subdivision scheme for quadrilateral meshes based on a 1-4 splitting operator. The scheme generates surfaces coincident with those of the Kobbelt interpolatory subdivision scheme for regular meshes. A new group of rules are designed for computing newly inserted vertices around extraordinary vertices. As an extension of the regular masks,the new rules are derived based on a reinterpretation of the regular masks. Eigen-structure analysis demonstrates that subdivision surfaces generated using the new scheme are C1 continuous and, in addition, have bounded curvature.
  • Item
    Real-Time Ray-Casting and Advanced Shading of Discrete Isosurfaces
    (The Eurographics Association and Blackwell Publishing, Inc, 2005) Hadwiger, Markus; Sigg, Christian; Scharsach, Henning; Buehler, Khatja; Gross, Markus
  • Item
    Realistic real-time rendering of landscapes using billboard clouds
    (The Eurographics Association and Blackwell Publishing, Inc, 2005) Behrendt, S.; Colditz, C.; Franzke, O.; Kopf, J.; Deussen, O.
  • Item
    Dual Marching Cubes: Primal Contouring of Dual Grids
    (The Eurographics Association and Blackwell Publishing Ltd., 2005) Schaefer, Scott; Warren, Joe
    We present a method for contouring an implicit function using a grid topologically dual to structured grids such as octrees. By aligning the vertices of the dual grid with the features of the implicit function, we are able to reproduce thin features of the extracted surface without excessive subdivision required by methods such as Marching Cubes or Dual Contouring. Dual Marching Cubes produces a crack-free, adaptive polygonalization of the surface that reproduces sharp features. Our approach maintains the advantage of using structured grids for operations such as CSG while being able to conform to the relevant features of the implicit function yielding much sparser polygonalizations than has been possible using structured grids.
  • Item
    2004 Eurographics Symposium on Parallel Graphics and Visualization
    (The Eurographics Association and Blackwell Publishing Ltd., 2005) Raffin, Bruno
  • Item
    Lightness Perception in Tone Reproduction for High Dynamic Range Images
    (The Eurographics Association and Blackwell Publishing, Inc, 2005) Krawczyk, Grzegorz; Myszkowski, Karol; Seidel, Hans-Peter
  • Item
    Re-coloring Images for Gamuts of Lower Dimension
    (The Eurographics Association and Blackwell Publishing, Inc, 2005) Rasche, Karl; Geist, Robert; Westall , James
  • Item
    3D Posture Reconstruction and Human Animation from 2D Feature Points
    (The Eurographics Association and Blackwell Publishing Ltd., 2005) Zhao, Jianhui; Li, Ling; Chee Keong, Kwoh
    An optimal approach is proposed in this paper for posture reconstruction and human animation from 2D feature points extracted from the monocular images containing human motions. Biomechanical constraints are encoded in every joint of the adopted 3D skeletal human model to make sure that each state of the joints represents a physically valid posture. Size of the human model is adjusted to be consistent with the human figure represented by feature points. Energy Function is defined to represent the residuals between the extracted 2D feature points and the corresponding features resulted from projection of the 3D human model. Local Adjustment and Global Adjustment procedures are proposed to place the joints and body segments into proper locations and orientations in 3D space to create the posture with the minimum value of Energy Function. To find the optimal solution of the ill-posed recovery problem from 2D to 3D, Genetic Algorithm is employed in the high-dimensional parameter space by considering all the parameters simultaneously. Smooth and continuous changes between consecutive frames are considered in development of the human animation procedure. The proposed approach produces optimal reconstruction results of any possible human postures and movements. It is different from classical kinematics and dynamics formulations, and is an attempt to bridge the gap between computer vision and computer animation in human motion study.