Browsing by Subject "Computer graphics"

Now showing items 1-20 of 27

    • Conference Object  

      Breaking the walls: Scene partitioning and portal creation 

      Lerner, A.; Chrysanthou, Yiorgos L.; Cohen-Or, D. (IEEE Computer Society, 2003)
      In this paper, we revisit the cells-and-portals visibility methods, originally developed for the special case of architectural interiors. We define an effectiveness measure for a cells-and-portals partitioning, and introduce ...
    • Conference Object  

      A case study of a virtual audience in a reconstruction of an ancient Roman odeon in Aphrodisias 

      Cain, K.; Chrysanthou, Yiorgos L.; Niccolucci, F.; Silberman, N. (Association for Computing Machinery, Inc, 2005)
      The benefits of including virtual humans into cultural heritage reconstructions are twofold: the realism of architectural models is increased by populating them
    • Book  

      Computer graphics and virtual environments : from realism to real-time 

      Slater, Mel; Chrysanthou, Yiorgos L. (Addison-Wesley, 2000)
    • Book  

      Computer graphics and virtual environments: from realism to real-time 

      Slater, Mel; Steed, Anthony; Chrysanthou, Yiorgos L. (Addison Wesley, 2002)
    • Article  

      Context-dependent crowd evaluation 

      Lerner, A.; Chrysanthou, Yiorgos L.; Shamir, A.; Cohen-Or, D. (2010)
      Many times, even if a crowd simulation looks good in general, there could be some specific individual behaviors which do not seem correct. Spotting such problems manually can become tedious, but ignoring them may harm the ...
    • Conference Object  

      Crest line extraction from point clouds 

      Stylianou, Georgios; Chrysanthou, Yiorgos L. (2005)
      We present a simple, automatic method for extracting feature curves, called crest lines, from point clouds. Crest lines are surface shape features having a mathematical background. Given an unstructured point cloud as ...
    • Conference Object  

      Crowd self-organization, streaming and short path smoothing 

      Soteris, Stylianou; Chrysanthou, Yiorgos L. (2006)
      Pedestrians implicitly cooperate by forming lanes inside dense crowd in order to facilitate flow and prevent complete passage blocking. Our aim is to re-enforce this self-organization phenomenon in dense crowd for the ...
    • Article  

      Crowds by example 

      Lerner, A.; Chrysanthou, Yiorgos L.; Lischinski, D. (2007)
      We present an example-based crowd simulation technique. Most crowd simulation techniques assume that the behavior exhibited by each person in the crowd can be defined by a restricted set of rules. This assumption limits ...
    • Conference Object  

      Energy efficient stream-based configurable architecture for embedded platforms 

      Pratas, F.; Tomas, P.; Trancoso, Pedro; Sousa, L. (2012)
      Reconfigurable hardware can be used as an energy and performance efficient co-processing solution to accelerate certain types of applications. To facilitate the design of hardware accelerators we have proposed a methodology ...
    • Article  

      Evaluation of disconnected quark loops for hadron structure using GPUs 

      Alexandrou, Constantia; Constantinou, Martha; Drach, V.; Hadjiyiannakou, Kyriakos; Jansen, K.; Koutsou, Giannis; Strelchenko, A.; Vaquero, A. (2014)
      A number of stochastic methods developed for the calculation of fermion loops are investigated and compared, in particular with respect to their efficiency when implemented on Graphics Processing Units (GPUs). We assess ...
    • Conference Object  

      Fast approximate visibility on the GPU using pre-computed 4D visibility fields 

      Gaitatzes, Athanasios; Andreadis, Anthousis; Papaioannou, Georgios J.; Chrysanthou, Yiorgos L. (2010)
      We present a novel GPU-based method for accelerating the visibility function computation of the lighting equation in dynamic scenes composed of rigid objects. The method pre-computes, for each object in the scene, the ...
    • Conference Object  

      Feature extraction for human motion indexing of acted dance performances 

      Aristidou, Andreas; Chrysanthou, Yiorgos L. (SciTePress, 2014)
      There has been an increasing use of pre-recorded motion capture data for animating virtual characters and syn- thesising different actions
    • Article  

      Fine-grain parallelism using multi-core, Cell/BE, and GPU systems 

      Pratas, F.; Trancoso, Pedro; Sousa, L.; Stamatakis, A.; Shi, G.; Kindratenko, V. (2012)
      Currently, we are facing a situation where applications exhibit increasing computational demands and where a large variety of parallel processor systems are available. In this paper we focus on exploiting fine-grain ...
    • Conference Object  

      Global optimization for motion estimation with applications to ultrasound videos of carotid artery plaques 

      Murillo, S.; Pattichis, Marios S.; Soliz, P.; Barriga, S.; Loizou, Christos P.; Pattichis, Constantinos S. (2010)
      Motion estimation from digital video is an ill-posed problem that requires a regularization approach. Regularization introduces a smoothness constraint that can reduce the resolution of the velocity estimates. The problem ...
    • Conference Object  

      High-dimensional visual similarity search: K-d generalized randomized forests [extended abstract] 

      Avrithis, Yannis S.; Emiris, Ioannis Z.; Samaras, George S. (Association for Computing Machinery, 2016)
      We propose a new data-structure, the generalized random-ized k-d forest, or k-d GeRaF, for approximate nearest neigh-bor searching in high dimensions. In particular, we intro-duce new randomization techniques to specify a ...
    • Article  

      Initial experiences porting a bioinformatics application to a graphics processor 

      Charalambous, Maria; Trancoso, Pedro; Stamatakis, A. (2005)
      Bioinformatics applications are one of the most relevant and compute-demanding applications today. While normally these applications are executed on clusters or dedicated parallel systems, in this work we explore the use ...
    • Conference Object  

      Integrated levels of detail 

      Stylianou, Georgios; Chrysanthou, Yiorgos L. (2006)
      We introduce a new mesh representation for arbitrary surfaces that integrates different levels of detail into the final representation. It is produced after remeshing an existing model and omits storing connectivity ...
    • Article  

      Integration and use of diesel engine, driveline and vehicle dynamics models for heavy duty truck simulation 

      Assanis, D.; Bryzik, W.; Chalhoub, N.; Filipi, Z.; Henein, N.; Jung, D.; Liu, X.; Louca, Loucas S.; Moskwa, J.; Munns, S.; Overholt, J.; Papalambros, P.; Riley, S.; Rubin, Z.; Sendur, P.; Stein, J.; Zhang, G. (1999)
      An integrated vehicle system simulation has been developed to take advantage of advances in physical process and component models, flexibility of graphical programming environments (such as MATLAB-SIMULINK), and ever ...
    • Doctoral Thesis  Open Access

      Interactive diffuse global illumination discretization methods for dynamic environments 

      Gaitatzes, Athanasios G. (Πανεπιστήμιο Κύπρου, Σχολή Θετικών και Εφαρμοσμένων Επιστημών / University of Cyprus, Faculty of Pure and Applied Sciences, 2012-10)
      Ο υπολογισμός του διάχυτου Καθολικού Φωτισμού βρίσκει ακόμη περιορισμένη χρήση σε διαδραστικές εφαρμογές, λόγω του υπολογιστικού κόστους της επίλυσης της εξίσωσης φωτο-ρεαλιστικής απεικόνισης φωτισμού σε δυναμικά περιβάλλοντα. ...
    • Conference Object  

      Interactive local tone mapping operator with the support of graphics hardware 

      Roch, B.; Artusi, A.; Michael, D.; Chrysanthou, Yiorgos L.; Chalmers, A. (Association for Computing Machinery, Inc, 2007)
      The flexibility of current graphics hardware is still not enough to ensure the full implementation of an original complex algorithm such as a local tone mapping operator, which maintains the same quality performances as ...