Now showing items 490-509 of 777

    • Perception-Based Lighting-by-Example 

      Ha, Hai Nam; Olivier, Patrick (The Eurographics Association, 2007)
      In computer graphics, easy-to-use tools for configuring lighting for 3D scenes are required by users. Following a perception-based lighting design framework, which models image quality using cognitively inspired objective ...
    • Perception-based painterly rendering: functionality and interface design 

      Nunes, Samuel; Almeida, Daniel; Brito, Vera; Carvalho, Joao; Rodrigues, Joao; Buf, J. M. Hans du (The Eurographics Association, 2006)
      Painterly rendering (non-photorealistic rendering or NPR) aims at translating photographs into paintings with discrete brush strokes, simulating certain techniques (im- or expressionism) and media (oil or watercolour). ...
    • Perceptual Level of Detail for Efficient Ray Tracing of Complex Scenes 

      Yang, X.; Chalmers, A. (The Eurographics Association, 2005)
      Rendering complex scenes in real time remains one of the major challenges in computer graphics. Recent research in perceptual rendering algorithms and level of detail techniques have shown that, by exploiting knowledge of ...
    • Perceptually-Oriented Interest Management In Large-Scale Networked Virtual Environments 

      Dunwell, I.; Whelan, J. C. (The Eurographics Association, 2005)
      Amongst the most significant challenges in developing large-scale multi-user virtual environments is the efficient filtering of data to each user - a process commonly described as "interest management". This work-in-progress ...
    • Perfect Spatial Hashing for Point-cloud-to-mesh Registration 

      Mejia-Parra, Daniel; Lalinde-Pulido, Juan; Sánchez, Jairo R.; Ruiz-Salguero, Oscar; Posada, Jorge (The Eurographics Association, 2019)
      Point-cloud-to-mesh registration estimates a rigid transformation that minimizes the distance between a point sample of a surface and a reference mesh of such a surface, both lying in different coordinate systems. ...
    • Perimeter Detection in Sketched Drawings of Polyhedral Shapes 

      Company, Pedro; Varley, Peter A. C.; Plumed, Raquel (The Eurographics Association, 2017)
      This paper describes a new "envelope" approach for detecting object perimeters in line-drawings vectorised from sketches of polyhedral objects. Existing approaches for extracting contours from digital images are unsuitable ...
    • Perlin Noise and 2D Second-Order Tensor Field Visualization 

      Liu, J.; Perrin, J.; Turner, M.; Hewitt, W. T. (The Eurographics Association, 2005)
      There has been much research in the use of texture for visulization the vector field data, whereas there has only been a few papers concerned specifically with tensor field data. This set is more complex and embeds more ...
    • Persistent Homology: a Step-by-step Introduction for Newcomers 

      Fugacci, Ulderico; Scaramuccia, Sara; Iuricich, Federico; Floriani, Leila De (The Eurographics Association, 2016)
      Persistent homology is a powerful notion rooted in topological data analysis which allows for retrieving the essential topological features of an object. The attention on persistent homology is constantly growing in a large ...
    • Phase Space Data-Driven Simulation of Elastic Materials 

      Monteagudo, Carlos; Lozano, Miguel; García-Fernández, Ignacio; Martinez-Gil, Francisco (The Eurographics Association, 2016)
      The use of data driven models in computer animation offers several benefits. We present an analysis of a regression model as a method to simulate cloth. In our approach, we generate data from a simple mass-spring system ...
    • Physical and Perceptual Limitations of a Projector-based High Dynamic Range Display 

      Wanat, Robert; Petit, Josselin; Mantiuk, Rafal (The Eurographics Association, 2012)
      High dynamic range (HDR) displays capable of reproducing scenes of high luminance (exceeding 2,000 cd/m2) and contrast (more than 10,000:1) are a useful tool for research on visual performance, image quality or colour ...
    • A Physical Model for the Polarized Scattering of Light 

      Brayford, David; Turner, Martin; Hewitt, W. T. (The Eurographics Association, 2008)
      The change in polarization state due to the interaction of light with the surface and beneath the surface of an object has become increasingly important in realistic image synthesis of materials such as metallic, iridescent ...
    • Physically Based Simulation and Visualization of Fire in Real-Time using the GPU 

      Rødal, Samuel; Storli, Geir; Gundersen, Odd Erik (The Eurographics Association, 2006)
      In this paper we present a physically based framework for real-time simulation and visualization of fire using the GPU. The physics of fire is modeled through a combination of a fluid solver and a combustion process causing ...
    • Physically Based Skeleton Tracking 

      López-Gandía, Axel; Susín, Antonio (The Eurographics Association, 2017)
      Skeleton tracking has multiple applications such as games, virtual reality, motion capture and more. One of the main challenges of pose detection is to be able to obtain the best possible quality with a cheap and easy-to-use ...
    • A Physically-Based Spatio-Temporal Sky Model 

      Guimera, David; Gutierrez, Diego; Jarabo, Adrián (The Eurographics Association, 2018)
      In this work we present a physically-based optical model of the atmosphere, that takes into account the seasonal and geographic variation of its composition. Based on data from the atmospheric science literature, we build ...
    • Physically-based Sticky Lips 

      Leach, Matthew; Maddock, Steve (The Eurographics Association, 2018)
      Abstract In this paper, a novel solution is provided for the sticky lip problem in computer facial animation, recreating the way the lips stick together when drawn apart in speech or in the formation of facial expressions. ...
    • Pixel-based Wake Interaction and Power Estimation for a Wind Farm with Irregular Boundary 

      Ohlsen, G.; Ruiz-Salguero, O.; Full, T.; Acosta, D. (The Eurographics Association, 2018)
      In the domain of generation of wind turbine energy, it is central to correctly estimate the interactions among the various turbines in a wind turbine farm. The spatial super-position of turbine wind wakes determines the ...
    • Pixel-Level Algorithms for Drawing Curves 

      Liu, Yong Kui; Wang, Peng Jie; Zhao, Dan Dan; Spelic, Denis; Mongus, Domen; Zalik, Borut (The Eurographics Association, 2011)
      This paper introduces new pixel level algorithms for parametric curves. The optimal value of the steps is first derived when rastrerizing parametric curves. A double-step algorithm using only integer arithmetic is presented ...
    • Point Cloud Visualization from Large-range Scanner in Android Devices 

      Pamos, Miguel Á.; Segura, Rafael (The Eurographics Association, 2012)
      In this work, we introduce a study of how to render a cloud of points extracted from a scanner based on LIDAR technology in an Android tablet
    • Polycube-based Decomposition for Fabrication 

      Fanni, Filippo A.; Cherchi, Gianmarco; Scateni, Riccardo (The Eurographics Association, 2017)
      In recent years, fabrication technologies developed at a very fast pace. However, some limitations on shape and dimension still apply both to additive and subtractive manufacturing, and one way to bypass them could be the ...
    • Polynomial Approximation of Blinn-Phong Model 

      Öztürk, Aydin; Bilgili, Ahmet; Kurt, Murat (The Eurographics Association, 2006)
      The Phong model has been one of the oldest and the most popular reflection models in Computer Graphics. It can be used to model specular highlights of various materials. In this paper, we consider a polynomial model and ...