Now showing items 1-19 of 19

    • 3D forest fire propagation simulation 

      Köse K.; Grammalidis, N.; Yilmaz, E.; Çetin, E. (2008)
      The increase in the number of forest fires in the last few years dispatch governments to take precautions. Besides prevention, early intervention is also very important in fire fighting. If the firefighters know where the ...
    • Animation of boiling phenomena 

      Bülbül, Abdullah; Küçüktunç, Onur; Özgüç, Bülent (IEEE, 2008-05)
      Phenomenon of boiling is a challenging topic for computer graphics due to its complex hydrodynamics and formulation. Realistic fluid animations require very heavy three-dimensional fluid flow calculations, and surface ...
    • Bessel functions-based reconstruction of non-uniformly sampled diffraction fields 

      Uzunov, V.; Esmer, G. Bora; Gotchev, A.; Onural, Levent; Özaktaş, Haldun M. (IEEE, 2007)
      A discrete computational model for the diffraction process is essential in forward problems related to holographic TV. The model must be as general as possible, since the shape of the displayed objects does not bear any ...
    • Circularly configured multi-SLM holographic display system 

      Yaraş, Fahri; Kang, Hoonjong; Onural, Levent (IEEE, 2011)
      The designed circular holographic display system produces ghost-like 3D optical reconstructions of a computer generated 3D model. System uses six phase-only reflective-type spatial light modulators (SLMs) that are configured ...
    • Connectivity-guided adaptive lifting transform for image like compression of meshes 

      Köse, Kıvanç; Çetin, Ahmet Enis; Güdükbay, Uğur; Onural, Levent (IEEE, 2007-05)
      We propose a new connectivity-guided adaptive wavelet transform based mesh compression framework. The 3D mesh is first transformed to 2D images on a regular grid structure by performing orthogonal projections onto the image ...
    • Current research activities on holographic video displays 

      Onural, L.; Yaraş, F.; Kang, H. (S P I E - International Society for Optical Engineering, 2010)
      "True 3D" display technologies target replication of physical volume light distributions. Holography is a promising true 3D technique. Widespread utilization of holographic 3D video displays is hindered by current technological ...
    • Design and implementation of a DMD based volumetric 3D display 

      Yücesoy V.; Tunaoǧlu, D.; Kovachev, M.; Ilieva, R.; Onural, L. (2008)
      A real image swept-volume volumetric display is developed. A piston type moving screen is used to obtain the desired volume. A commercially available DMD device is used to project 2D slices of a 3D frame. There is a varying ...
    • Error resilient layered stereoscopic video streaming 

      Tan, Ahmet Serdar; Aksay, A.; Bilen, Ç.; Bozdağı-Akar, G.; Arıkan, Erdal (IEEE, 2007)
      In this paper, error resilient stereoscopic video streaming problem is addressed. Two different Forward Error Correction (FEC) codes namely Systematic LT and RS codes are utilized to protect the stereoscopic video data ...
    • Keyframe reduction techniques for motion capture data 

      Önder, Onur; Güdükbay, Uğur; Özgüç, Bülent; Erdem, T.; Erdem, Ç.; Özkan, M. (IEEE, 2008-05)
      Two methods for keyframe reduction of motion capture data are presented. Keyframe reduction of motion capture data enables animators to easily edit motion data with smaller number of keyframes. One of the approaches achieves ...
    • Motion control for realistic walking behavior using inverse kinematics 

      Memişoǧlu, Aydemir; Güdükbay,Uğur; Özgüç, Bülent (IEEE, 2007-05)
      This study presents an interactive hierarchical motion control system for the animation of human figure locomotion. The articulated figure animation system creates movements using motion control techniques at different ...
    • Multi-SLM holographic display system with planar configuration 

      Yaraş, Fahri; Kang, Hoonjong; Onural, Levent (IEEE, 2010)
      Holographic display system that uses six phase-only spatial light modulators (SLMs) performs holographic reconstructions from the phase-hologram of a point cloud that is extracted from 3D object. The SLMs are tiled as a ...
    • An overview of research in 3DTV 

      Onural, Levent (IEEE, 2007)
      3DTV is regarded by the experts and the general public as the next major step in video technologies. The ghost-like images of remote persons or objects are already depicted in many futuristic movies; both entertainment ...
    • Performance assessment of a diffraction field computation method based on source model 

      Esmer, G. B.; Onural, L.; Ozaktas, H. M.; Uzunov, V.; Gotchev, A. (2008)
      Efficient computation of scalar optical diffraction field due to an object is an essential issue in holographic 3D television systems. The first step in the computation process is to construct an object. As a solution for ...
    • Piecewise-planar 3D reconstruction in rate-distortion sense 

      İmre, E.; Güdükbay, Uğur; Alatan, A. A. (IEEE, 2007-05)
      In this paper, a novel rate-distortion optimization inspired 3D piecewise-planar reconstruction algorithm is proposed. The algorithm refines a coarse 3D triangular mesh, by inserting vertices in a way to minimize the ...
    • Practical and realistic animation of cloth 

      Bayraktar, Serkan; Güdükbay, Uğur; Özgüç, Bülent (IEEE, 2007-05)
      In this paper, we propose a system for the practical animation of cloth materials. A mass spring based cloth model is used. Explicit time integration methods are used to solve the equations of motion. We update the spring ...
    • Reconstruction of scalar diffraction field from distributed data points over 3D space 

      Esmer, G. Bora; Uzunov, V.; Onural, Levent; Gotchev, A.; Özaktaş, Haldun M. (IEEE, 2007)
      Diffraction field computation is an important task in the signal conversion stage of the holographic 3DTV. We consider an abstract setting, where the diffraction field of the desired 3D scene to be displayed is given by ...
    • Research trends in holographic 3DTV displays 

      Onural, Levent (IEEE, 2009)
      Holographic 3DTV and especially displays are attracting more attention. There are SLM based laboratory prototypes. Current images can be viewed from a very narrow angle. Satisfactory holographic displays can be expected ...
    • Robust transmission of multi-view video streams using flexible macroblock ordering and systematic LT codes 

      Argyropoulos, S.; Tan, A. Serdar; Thomos, N.; Arıkan, Erdal; Strintzis, M. G. (IEEE, 2007)
      The transmission of fully compatible H.264/AVC multi-view video coded streams over packet erasure networks is examined. Macroblock classification into unequally important slice groups is considered using the Flexible ...
    • Simulation of water drops on a surface 

      Algan, Eren; Kabak, Mustafa; Özgüç, Bülent; Çapin, Tolga (IEEE, 2008-05)
      We have designed and implemented a model for rendering and animating water drops moving on a surface under physical effects such as gravity, surface affinity and wind. For improved rendering, the output of the simulation ...