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Now showing items 21-40 of 60

  • Evaluating the visual fidelity of physically based animations 

    DINGLIANA, JOHN; GIANG, THANH; KAISER, MARY K.; O'SULLIVAN, CAROL ANN; O'SULLIVAN, CAROL ANN (2003)
    For many systems that produce physically based animations, plausibility rather than accuracy is acceptable. We consider the problem of evaluating the visual quality of animations in which physical parameters have been ...
  • An experimental approach to predicting saliency for simplified polygonal models 

    HOWLETT, SARAH; HAMILL, JOHN; O'SULLIVAN, CAROL ANN (ACM Press, 2004)
    In this paper, we consider the problem of determining feature saliency for 3D objects and describe a series of experiments that examined if salient features exist and can be predicted in advance. We attempt to determine ...
  • Extracting geometric models from medieval moundling profiles for case-based reasoning 

    BRADSHAW, GARETH; O'SULLIVAN, CAROL ANN (2000)
    Cross-sectional profiles of medieval mouldings are often considered to be a vital form of data for art historians. Mouldings have often been used to highlight salient areas of buildings, and they provide a wealth of ...
  • Eye movements and interactive graphics 

    HOWLETT, SARAH; DINGLIANA, JOHN LALZOLIANA; O'SULLIVAN, CAROL ANN (Elsevier Science, 2003)
    In this chapter, we will discuss the usefulness of eye-tracking for computer applications that attempt to render simulations at interactive rates. Some recent research that uses this technology is presented. While ...
  • Eye-catching Crowds: Saliency based selective variation 

    O'SULLIVAN, CAROL ANN; MC DONNELL, RACHEL (2009)
    Populated virtual environments need to be simulated with as much variety as possible. By identifying the most salient parts of the scene and characters, available resources can be concentrated where they are needed most. ...
  • Fidelity metrics for animation 

    O'SULLIVAN, CAROL ANN (2004)
    In this paper, the problem of evaluating the fidelity of animations will be addressed. Plausible simulation and the perceptual impact of animations generated using approximations or interactive manipulation will be ...
  • A framework for comparing task performance in real and virtual scenes 

    O'SULLIVAN, CAROL ANN (ACM Press, 2005)
    In this paper, we describe a framework for comparing task performance in real and virtual environments. Realistic graphics, rear projection, haptics and rapid prototyping are used to match the virtual scene to the real ...
  • Geometry reduction for urban simulation on handheld devices 

    O'SULLIVAN, CAROL ANN (2005)
    We present a real-time urban simulation on a Personal Digital Assistant (PDA). An existing desktop urban simulation is used to automatically generate potential visibility data, sub-divide the world into areas of similar ...
  • Harnessing the human visual system for image based modeling: an interaction system 

    O'SULLIVAN, CAROL ANN (2006)
    We present a novel interaction system for modeling 3D geometry from photographs. Given a set of stereo pairs, along with their camera parameters, the interface tracks the movements of the users and allows them to ...
  • Levels of detail for crowds and groups 

    CASSELL, JUSTINE; VILHJALMSSON, HANNES; DINGLIANA, JOHN; MACNAMEE, BRIAN; PETERS, CHRISTOPHER; GIANG, THANH; DOBBYN, SIMON; O'SULLIVAN, CAROL ANN (Blackwell, 2002)
    Work on levels of detail for human simulation has occurred mainly on a geometrical level, either by reducing the numbers of polygons representing a virtual human, or replacing them with a two-dimensional imposter. ...
  • LibViz: Data Visualisation of the Old Library 

    Ruhland, Kerstin; Sedlmair, Michael; BIOLETTI, SUSAN; O'SULLIVAN, CAROL ANN (2009)
    The Old Library of Trinity College Dublin, built in 1732, is an internationally renowned research library. In recent decades it has also become a major tourist attraction in Dublin, with the display of the Book of Kells ...
  • LOD human representations: a comparative study 

    MCDONNELL, RACHEL; O'SULLIVAN, CAROL ANN; DOBBYN, SIMON (2005)
    Real-time crowd systems are increasing in popularity and importance. With this comes the need for accurate low level of detail (LOD) human model representations. Currently, the two most commonly used representations for ...
  • A memory model for autonomous virtual humans 

    PETERS, CHRISTOPHER; O'SULLIVAN, CAROL ANN (2002)
    A memory model based on ?stage theory?, the dominant view of memory from the field of cognitive psychology, is presented for application to autonomous virtual humans. The virtual human senses external stimuli through a ...
  • Men behaving appropriately: integrating the role passing technique into the ALOHA system 

    MACNAMEE, BRIAN; DOBBYN, SIMON; CUNNINGHAM, PADRAIG; O'SULLIVAN, CAROL ANN (2002)
    The Adaptive Level of Detail for Human Animation (ALOHA) system is a platform for animating virtual humans within a virtual environment using levels-of-detail for geometry, motion and conversational behaviour. Until now ...
  • A model of collision perception for real-time animation 

    RADACH, RALPH; COLLINS, STEVEN; O'SULLIVAN, CAROL ANN (Springer, Wien, 1999)
    A model of human visual perception of collisions is presented, based on twodimensional measures of eccentricity and separation. The model is validated by performing psychophysical experiments. We demonstrate the feasibility ...
  • New metrics for evaluation of collision detection techniques 

    LEVEY, EVIN; PETERS, CHRISTOPHER; O'SULLIVAN, CAROL ANN (2000)
    In this paper we describe new metrics for the evaluation of collision detection techniques. Through careful study of common applications of these techniques we have developed a series of comparative tests that should ...
  • A perceptual approach to trimming unstructured lumigraphs 

    O'SULLIVAN, CAROL ANN (2007)
    We present a novel perceptual method to reduce the visual redundancy of unstructured lumigraphs, an image based representation designed for interactive rendering. We combine features of the unstructured lumigraph algorithm ...
  • Perceptual evaluation of level of detail clothing for virtual humans 

    MCDONNELL, RACHEL; DOBBYN, SIMON; Collins, Steven; O'SULLIVAN, CAROL ANN; DOBBYN, SIMON; MCDONNELL, RACHEL; O'SULLIVAN, CAROL ANN (ACM, 2006)
    Recent developments in crowd simulation have allowed thousands of characters to be rendered in real-time. Usually this is achieved through the use of Level of Detail (LOD) models for the individuals in the crowd. ...
  • Perceptually adaptive graphics 

    MCDONNELL, RACHEL; O'SULLIVAN, CAROL ANN (2004)
    In recent years, the Graphics community has come to realise the importance of taking human perception into account when striving for realism in images, animations and Virtual Environments. In May 2001, a EUROGRAPHICS/ SIGGRAPH ...