CEIG12

Permanent URI for this collection

https://diglib.eg.org/handle/10.2312/896
Jaen, Spain

BibTeX (CEIG12)
@inproceedings{
:10.2312/LocalChapterEvents/CEIG/CEIG12/001-010,

booktitle = {
Spanish Computer Graphics Conference},

editor = {
Isabel Navazo and Gustavo Patow
},
title = {{
A New Approach to Explore Integral Field Spectroscopy Data}},

author = {
Romo, Celia
 and 
Torres, Juan Carlos
 and 
León, Alejandro J.
 and 
Pérez, E.
},
year = {
2012},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-92-0},

DOI = {
/10.2312/LocalChapterEvents/CEIG/CEIG12/001-010}

}
@inproceedings{
:10.2312/LocalChapterEvents/CEIG/CEIG12/031-040,

booktitle = {
Spanish Computer Graphics Conference},

editor = {
Isabel Navazo and Gustavo Patow
},
title = {{
Uncertainty Visualization of Brain Fibers}},

author = {
Hermosilla, Pedro
 and 
Brecheisen, Ralph
 and 
Vázquez, Pere-Pau
 and 
Vilanova, Anna
},
year = {
2012},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-92-0},

DOI = {
/10.2312/LocalChapterEvents/CEIG/CEIG12/031-040}

}
@inproceedings{
:10.2312/LocalChapterEvents/CEIG/CEIG12/021-029,

booktitle = {
Spanish Computer Graphics Conference},

editor = {
Isabel Navazo and Gustavo Patow
},
title = {{
High Resolution Medical 3D Data Sets on Mobile Devices and WebGL}},

author = {
Jimenez, Juan-Roberto
 and 
Noguera, Jose Maria
},
year = {
2012},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-92-0},

DOI = {
/10.2312/LocalChapterEvents/CEIG/CEIG12/021-029}

}
@inproceedings{
:10.2312/LocalChapterEvents/CEIG/CEIG12/011-020,

booktitle = {
Spanish Computer Graphics Conference},

editor = {
Isabel Navazo and Gustavo Patow
},
title = {{
More Stable SPH-based Fluid Simulation}},

author = {
Perea, Juan J.
 and 
Cordero, Juan M.
},
year = {
2012},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-92-0},

DOI = {
/10.2312/LocalChapterEvents/CEIG/CEIG12/011-020}

}
@inproceedings{
:10.2312/LocalChapterEvents/CEIG/CEIG12/045-048,

booktitle = {
Spanish Computer Graphics Conference},

editor = {
Isabel Navazo and Gustavo Patow
},
title = {{
Ventricular Puncture Trainer}},

author = {
Pandiella, Imanol Muñoz
 and 
Monclús, Eva
 and 
Brunet, Pere
 and 
Conesa, Gerard
},
year = {
2012},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-92-0},

DOI = {
/10.2312/LocalChapterEvents/CEIG/CEIG12/045-048}

}
@inproceedings{
:10.2312/LocalChapterEvents/CEIG/CEIG12/049-056,

booktitle = {
Spanish Computer Graphics Conference},

editor = {
Isabel Navazo and Gustavo Patow
},
title = {{
A GPU Based Method for the Automatic Generation of Near-Optimal Navigation Meshes}},

author = {
Oliva, Ramon
 and 
Pelechano, Nuria
},
year = {
2012},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-92-0},

DOI = {
/10.2312/LocalChapterEvents/CEIG/CEIG12/049-056}

}
@inproceedings{
:10.2312/LocalChapterEvents/CEIG/CEIG12/041-044,

booktitle = {
Spanish Computer Graphics Conference},

editor = {
Isabel Navazo and Gustavo Patow
},
title = {{
An Application to Interact with 3D Models Reconstructed from Medical Images}},

author = {
Paulano, F.
 and 
Pulido, R.
 and 
Jiménez, J. J.
},
year = {
2012},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-92-0},

DOI = {
/10.2312/LocalChapterEvents/CEIG/CEIG12/041-044}

}
@inproceedings{
:10.2312/LocalChapterEvents/CEIG/CEIG12/077-080,

booktitle = {
Spanish Computer Graphics Conference},

editor = {
Isabel Navazo and Gustavo Patow
},
title = {{
Locating Companies in 3D Urban Environments on the Internet}},

author = {
Estrella, Ana M. López
 and 
Ortega, M. Dolores Robles
 and 
Alvarado, Lidia Ortega
 and 
Higueruela, Francisco R. Feito
},
year = {
2012},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-92-0},

DOI = {
/10.2312/LocalChapterEvents/CEIG/CEIG12/077-080}

}
@inproceedings{
:10.2312/LocalChapterEvents/CEIG/CEIG12/067-075,

booktitle = {
Spanish Computer Graphics Conference},

editor = {
Isabel Navazo and Gustavo Patow
},
title = {{
Bringing Direct Local Control to Interactive Visual Editing of Procedural Buildings}},

author = {
Riu, Adria
 and 
Patow, Gustavo
},
year = {
2012},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-92-0},

DOI = {
/10.2312/LocalChapterEvents/CEIG/CEIG12/067-075}

}
@inproceedings{
:10.2312/LocalChapterEvents/CEIG/CEIG12/057-066,

booktitle = {
Spanish Computer Graphics Conference},

editor = {
Isabel Navazo and Gustavo Patow
},
title = {{
Visual Language Generalization for Procedural Modeling of Buildings}},

author = {
Barroso, Santiago
 and 
Patow, Gustavo
},
year = {
2012},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-92-0},

DOI = {
/10.2312/LocalChapterEvents/CEIG/CEIG12/057-066}

}
@inproceedings{
:10.2312/LocalChapterEvents/CEIG/CEIG12/091-098,

booktitle = {
Spanish Computer Graphics Conference},

editor = {
Isabel Navazo and Gustavo Patow
},
title = {{
Differential Ray Marching}},

author = {
Muñoz, Adolfo
},
year = {
2012},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-92-0},

DOI = {
/10.2312/LocalChapterEvents/CEIG/CEIG12/091-098}

}
@inproceedings{
:10.2312/LocalChapterEvents/CEIG/CEIG12/081-090,

booktitle = {
Spanish Computer Graphics Conference},

editor = {
Isabel Navazo and Gustavo Patow
},
title = {{
Generating Coherent Ray Directions in Path Tracing}},

author = {
Torres, Roberto
 and 
Martín, Pedro J.
 and 
Gavilanes, Antonio
},
year = {
2012},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-92-0},

DOI = {
/10.2312/LocalChapterEvents/CEIG/CEIG12/081-090}

}
@inproceedings{
:10.2312/LocalChapterEvents/CEIG/CEIG12/099-108,

booktitle = {
Spanish Computer Graphics Conference},

editor = {
Isabel Navazo and Gustavo Patow
},
title = {{
Analysis of Coded Apertures for Defocus Deblurring of HDR Images}},

author = {
Garcia, Luis
 and 
Presa, Lara
 and 
Gutierrez, Diego
 and 
Masia, Belen
},
year = {
2012},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-92-0},

DOI = {
/10.2312/LocalChapterEvents/CEIG/CEIG12/099-108}

}
@inproceedings{
:10.2312/LocalChapterEvents/CEIG/CEIG12/109-112,

booktitle = {
Spanish Computer Graphics Conference},

editor = {
Isabel Navazo and Gustavo Patow
},
title = {{
Interactive Generation of (Paleontological) Scientific Illustrations from 3D-models}},

author = {
Schäfer, Sebastian
 and 
Knopp, Christoph
 and 
Krömker, Detlef
},
year = {
2012},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-92-0},

DOI = {
/10.2312/LocalChapterEvents/CEIG/CEIG12/109-112}

}
@inproceedings{
:10.2312/LocalChapterEvents/CEIG/CEIG12/113-122,

booktitle = {
Spanish Computer Graphics Conference},

editor = {
Isabel Navazo and Gustavo Patow
},
title = {{
Design of an Information System for Cultural Heritage}},

author = {
Soler, Francisco
 and 
Torres, Juan Carlos
 and 
León, Alejandro J.
 and 
Luzon, M. Victoria
},
year = {
2012},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-92-0},

DOI = {
/10.2312/LocalChapterEvents/CEIG/CEIG12/113-122}

}
@inproceedings{
:10.2312/LocalChapterEvents/CEIG/CEIG12/123-132,

booktitle = {
Spanish Computer Graphics Conference},

editor = {
Isabel Navazo and Gustavo Patow
},
title = {{
A Procedural Modeling System for the Creation of Huge Models}},

author = {
Cubero, Francisco
 and 
Mas, Albert
 and 
Patow, Gustavo
},
year = {
2012},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-92-0},

DOI = {
/10.2312/LocalChapterEvents/CEIG/CEIG12/123-132}

}
@inproceedings{
:10.2312/LocalChapterEvents/CEIG/CEIG12/133-136,

booktitle = {
Spanish Computer Graphics Conference},

editor = {
Isabel Navazo and Gustavo Patow
},
title = {{
PrimeSense Sensors as a Low-cost Method for Motion Capture on Clinical Tests}},

author = {
Sanmartín, G.
 and 
Flores, J.
 and 
Arias, P.
 and 
Cudeiro, J.
 and 
Méndez, R.
},
year = {
2012},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-92-0},

DOI = {
/10.2312/LocalChapterEvents/CEIG/CEIG12/133-136}

}
@inproceedings{
:10.2312/LocalChapterEvents/CEIG/CEIG12/137-140,

booktitle = {
Spanish Computer Graphics Conference},

editor = {
Isabel Navazo and Gustavo Patow
},
title = {{
Design of a Scalable System for the Sensorization of Virtual TV Sets with Live Broadcast}},

author = {
Méndez, Roi
 and 
Sanmartín, Gabriel
 and 
Mera, David
 and 
Flores, Julián
 and 
Castelló, Enrique
},
year = {
2012},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-92-0},

DOI = {
/10.2312/LocalChapterEvents/CEIG/CEIG12/137-140}

}
@inproceedings{
:10.2312/LocalChapterEvents/CEIG/CEIG12/141-150,

booktitle = {
Spanish Computer Graphics Conference},

editor = {
Isabel Navazo and Gustavo Patow
},
title = {{
A Survey on Development Tools for Mobile Augmented Reality}},

author = {
Rovelo, Gustavo
 and 
Abad, Francisco
 and 
Camahort, Emilio
},
year = {
2012},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-92-0},

DOI = {
/10.2312/LocalChapterEvents/CEIG/CEIG12/141-150}

}
@inproceedings{
:10.2312/LocalChapterEvents/CEIG/CEIG12/151-151,

booktitle = {
Spanish Computer Graphics Conference},

editor = {
Isabel Navazo and Gustavo Patow
},
title = {{
WebGL-based Visualization of Voxelized Brain Models}},

author = {
Torre, J. Cruz de la
 and 
Ibáñez, J. Jiménez
 and 
Estrella, A. M. López
 and 
Miras, J. Ruiz de
},
year = {
2012},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-92-0},

DOI = {
/10.2312/LocalChapterEvents/CEIG/CEIG12/151-151}

}
@inproceedings{
:10.2312/LocalChapterEvents/CEIG/CEIG12/152-152,

booktitle = {
Spanish Computer Graphics Conference},

editor = {
Isabel Navazo and Gustavo Patow
},
title = {{
Teaching Tool for Self-learning and Self-evaluation of Human Anatomy Using 3D Models of Human Bones}},

author = {
Pamos, Miguel Á.
 and 
Segura, Rafael
},
year = {
2012},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-92-0},

DOI = {
/10.2312/LocalChapterEvents/CEIG/CEIG12/152-152}

}
@inproceedings{
:10.2312/LocalChapterEvents/CEIG/CEIG12/153-153,

booktitle = {
Spanish Computer Graphics Conference},

editor = {
Isabel Navazo and Gustavo Patow
},
title = {{
Point Cloud Visualization from Large-range Scanner in Android Devices}},

author = {
Pamos, Miguel Á.
 and 
Segura, Rafael
},
year = {
2012},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-92-0},

DOI = {
/10.2312/LocalChapterEvents/CEIG/CEIG12/153-153}

}
@inproceedings{
:10.2312/LocalChapterEvents/CEIG/CEIG12/154-154,

booktitle = {
Spanish Computer Graphics Conference},

editor = {
Isabel Navazo and Gustavo Patow
},
title = {{
3D Interaction with Smartphone-like Devices}},

author = {
Rodríguez, A.
 and 
León, A.
 and 
Torres, J. C.
},
year = {
2012},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-92-0},

DOI = {
/10.2312/LocalChapterEvents/CEIG/CEIG12/154-154}

}
@inproceedings{
:10.2312/LocalChapterEvents/CEIG/CEIG12/160-160,

booktitle = {
Spanish Computer Graphics Conference},

editor = {
Isabel Navazo and Gustavo Patow
},
title = {{
Design of a Game Creation Environment}},

author = {
Chover, M.
 and 
Folch, F.
 and 
González, C.
 and 
Gumbau, J.
 and 
Quirós, R.
 and 
Rebollo, C.
 and 
Remolar, I.
 and 
Sánchez, I.
},
year = {
2012},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-92-0},

DOI = {
/10.2312/LocalChapterEvents/CEIG/CEIG12/160-160}

}
@inproceedings{
:10.2312/LocalChapterEvents/CEIG/CEIG12/156-156,

booktitle = {
Spanish Computer Graphics Conference},

editor = {
Isabel Navazo and Gustavo Patow
},
title = {{
Management of 3D Geometry on Portable Devices}},

author = {
Martínez, José Olmos
 and 
Romero, Francisco Ramos
 and 
Gonzalez, Carlos
},
year = {
2012},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-92-0},

DOI = {
/10.2312/LocalChapterEvents/CEIG/CEIG12/156-156}

}
@inproceedings{
:10.2312/LocalChapterEvents/CEIG/CEIG12/157-157,

booktitle = {
Spanish Computer Graphics Conference},

editor = {
Isabel Navazo and Gustavo Patow
},
title = {{
Evaluating Three Versions of an Augmented Reality Mobile Game about Recycling}},

author = {
Furió, D.
 and 
Juan, M.-Carmen
 and 
Alem, L.
 and 
Ashworth, P.
},
year = {
2012},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-92-0},

DOI = {
/10.2312/LocalChapterEvents/CEIG/CEIG12/157-157}

}
@inproceedings{
:10.2312/LocalChapterEvents/CEIG/CEIG12/158-158,

booktitle = {
Spanish Computer Graphics Conference},

editor = {
Isabel Navazo and Gustavo Patow
},
title = {{
Interactive Virtual Tours with Panoramic Video}},

author = {
Pérez, J.
 and 
Tamayo, I.
 and 
Garcia, J.
},
year = {
2012},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-92-0},

DOI = {
/10.2312/LocalChapterEvents/CEIG/CEIG12/158-158}

}
@inproceedings{
:10.2312/LocalChapterEvents/CEIG/CEIG12/159-159,

booktitle = {
Spanish Computer Graphics Conference},

editor = {
Isabel Navazo and Gustavo Patow
},
title = {{
Kinamo: Gait Analysis System}},

author = {
Martínez, H.
 and 
Gil-Gómez, J. A.
 and 
Martínez-Gramage, J.
 and 
Juan, M. C.
},
year = {
2012},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-92-0},

DOI = {
/10.2312/LocalChapterEvents/CEIG/CEIG12/159-159}

}
@inproceedings{
:10.2312/LocalChapterEvents/CEIG/CEIG12/155-155,

booktitle = {
Spanish Computer Graphics Conference},

editor = {
Isabel Navazo and Gustavo Patow
},
title = {{
Tracking for Virtual Environment using Kinect}},

author = {
Sánchez, M. García
 and 
Salas, A. León
 and 
Cantero, J. C. Torres
},
year = {
2012},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-92-0},

DOI = {
/10.2312/LocalChapterEvents/CEIG/CEIG12/155-155}

}
@inproceedings{
:10.2312/LocalChapterEvents/CEIG/CEIG12/163-163,

booktitle = {
Spanish Computer Graphics Conference},

editor = {
Isabel Navazo and Gustavo Patow
},
title = {{
Computing Curvature Information on 3D Meshes from Cultural Heritage Artifacts}},

author = {
López, L.
 and 
Torres, J. C.
 and 
Soler, F.
},
year = {
2012},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-92-0},

DOI = {
/10.2312/LocalChapterEvents/CEIG/CEIG12/163-163}

}
@inproceedings{
:10.2312/LocalChapterEvents/CEIG/CEIG12/161-161,

booktitle = {
Spanish Computer Graphics Conference},

editor = {
Isabel Navazo and Gustavo Patow
},
title = {{
Population Dynamics Visualization}},

author = {
Lozano, Miguel
 and 
García-Fernández, Ignacio
 and 
Orduña, Juan Manuel
},
year = {
2012},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-92-0},

DOI = {
/10.2312/LocalChapterEvents/CEIG/CEIG12/161-161}

}
@inproceedings{
:10.2312/LocalChapterEvents/CEIG/CEIG12/162-162,

booktitle = {
Spanish Computer Graphics Conference},

editor = {
Isabel Navazo and Gustavo Patow
},
title = {{
Method of 3D Reconstruction using Silhouettes}},

author = {
Villen, J. D. Gomez
},
year = {
2012},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-92-0},

DOI = {
/10.2312/LocalChapterEvents/CEIG/CEIG12/162-162}

}
@inproceedings{
:10.2312/LocalChapterEvents/CEIG/CEIG12/165-165,

booktitle = {
Spanish Computer Graphics Conference},

editor = {
Isabel Navazo and Gustavo Patow
},
title = {{
Multi-resolution Myocardial Architecture Study}},

author = {
Poveda, F.
 and 
Gil, D.
 and 
Gurgui, T.
 and 
Marti, E.
},
year = {
2012},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-92-0},

DOI = {
/10.2312/LocalChapterEvents/CEIG/CEIG12/165-165}

}
@inproceedings{
:10.2312/LocalChapterEvents/CEIG/CEIG12/164-164,

booktitle = {
Spanish Computer Graphics Conference},

editor = {
Isabel Navazo and Gustavo Patow
},
title = {{
Lineal Hull: Two Algorithms for Convex Hull}},

author = {
Sánchez, M. García
 and 
Salas, A. León
 and 
Cantero, J. C. Torres
},
year = {
2012},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-92-0},

DOI = {
/10.2312/LocalChapterEvents/CEIG/CEIG12/164-164}

}
@inproceedings{
:10.2312/LocalChapterEvents/CEIG/CEIG12/167-167,

booktitle = {
Spanish Computer Graphics Conference},

editor = {
Isabel Navazo and Gustavo Patow
},
title = {{
Modular Design of Graph Theory Based Software for Scientific Applications and Education}},

author = {
Sampedro, Frederic
 and 
Puig, Anna
 and 
Benseny, Antoni
},
year = {
2012},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-92-0},

DOI = {
/10.2312/LocalChapterEvents/CEIG/CEIG12/167-167}

}
@inproceedings{
:10.2312/LocalChapterEvents/CEIG/CEIG12/166-166,

booktitle = {
Spanish Computer Graphics Conference},

editor = {
Isabel Navazo and Gustavo Patow
},
title = {{
Non-rigid 3D Faces Registration using Geodesic Distance Maps}},

author = {
Gurguí, T.
 and 
Poveda, F.
 and 
Martí, E.
},
year = {
2012},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-92-0},

DOI = {
/10.2312/LocalChapterEvents/CEIG/CEIG12/166-166}

}
@inproceedings{
:10.2312/LocalChapterEvents/CEIG/CEIG12/168-168,

booktitle = {
Spanish Computer Graphics Conference},

editor = {
Isabel Navazo and Gustavo Patow
},
title = {{
From the Patient to the Surgery - A Complete Computer Vision and Graphics Process}},

author = {
Martinez, A.
 and 
Jimenez, J.
},
year = {
2012},

publisher = {
The Eurographics Association},


ISBN = {978-3-905673-92-0},

DOI = {
/10.2312/LocalChapterEvents/CEIG/CEIG12/168-168}

}

Browse

Recent Submissions

Now showing 1 - 37 of 37
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    A New Approach to Explore Integral Field Spectroscopy Data
    (The Eurographics Association, 2012) Romo, Celia; Torres, Juan Carlos; León, Alejandro J.; Pérez, E.; Isabel Navazo and Gustavo Patow
    Integral field spectroscopy (IFS) is a technique that is widely used in astronomy. It gives simultaneously the spectra of each spatial sampling element of a given field, generating a large amount of information that is also known as data cube. Visualizing and exploring these data cubes in a flexible and an intuitive way is a challenge. Although the information collected is three-dimensional (representing the I(x, y, l) function) and the scientific community generally recognizes the need to use 3D visualization tools, two dimensional tools are usually used to visualize the data cubes and very few 3D exploration techniques have been proposed specifically for astrophysics. This paper presents an interactive method to explore IFS data and two different GPU implementations of it.
  • No Thumbnail Available
    Item
    Uncertainty Visualization of Brain Fibers
    (The Eurographics Association, 2012) Hermosilla, Pedro; Brecheisen, Ralph; Vázquez, Pere-Pau; Vilanova, Anna; Isabel Navazo and Gustavo Patow
    Diffuse Tensor Imaging (DTI) is an acquisition method based on Magnetic Resonance (MR) that provides information on the white matter fiber pathways in the living human brain. Such knowledge is crucial for understanding the way different parts of the brain work and how they interact with each other. The reconstruction of fiber tracts, however, depends on a number of parameters that introduce a degree of uncertainty in the data. Together with the parameter setting, other elements such as noise, motion, partial volume effects, or image artifacts increase the uncertainty. Therefore, fiber tracking algorithms may produce misleading results. Visualizing such uncertainty is important to avoid taking wrong decisions in medical environments. In this paper we present a set of techniques that provide a better understanding on the visualization of brain fibers by means of textures, silhouettes, ambient occlusion, and animation.
  • No Thumbnail Available
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    High Resolution Medical 3D Data Sets on Mobile Devices and WebGL
    (The Eurographics Association, 2012) Jimenez, Juan-Roberto; Noguera, Jose Maria; Isabel Navazo and Gustavo Patow
    Nowadays, mobile devices and the web are being used to deliver 3D graphics to mass users. However, applications such as visualization of high resolution medical models are still impossible to handle in such platforms due to texture limitations, mainly the lack of 3D texture support. In this paper we propose a software architecture and a novel texture storage technique that overcome these limitations. In addition, our proposal allows us to adapt existing direct volume rendering techniques based on 3D textures to mobile devices and WebGL. Our experiments demonstrate the feasibility and validity of our proposal to render high resolution volumetric models on both platforms.
  • No Thumbnail Available
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    More Stable SPH-based Fluid Simulation
    (The Eurographics Association, 2012) Perea, Juan J.; Cordero, Juan M.; Isabel Navazo and Gustavo Patow
    The simulation of fluid is a field largely discussed, from the viewpoint of engineering, in the so-called computational fluid dynamics (CFD). A problem that occurs repeatedly in the literature of CFD is the stability of the simulation. One of the elements that introduce instability in any CFD model is the temporal integration method. Among the most commonly used CFD techniques, both in the field of engineering and in the computer graphics, is SPH, which is particularly relevant to its computational simplicity. However, this technique adds stability problems due to the treatment of viscous and pressure terms arising from the formulation of Navier'Stokes. SPH also introduces greater instability by the need to use interpolation functions appropriate to the phenomena that occur in fluid dynamics. We present solutions to these four problems of inestability mentioned: treatment of the terms of pressure and viscosity that appear in the Navier'Stokes, the formulation of the characteristic interpolation function of SPH and treatment of temporal integration.
  • No Thumbnail Available
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    Ventricular Puncture Trainer
    (The Eurographics Association, 2012) Pandiella, Imanol Muñoz; Monclús, Eva; Brunet, Pere; Conesa, Gerard; Isabel Navazo and Gustavo Patow
    The learning process in neurosurgery is a large and difficult task based on experimentation, being ventriculostomy not an exception. We have developed a virtual reality system to help training novel surgeons on this kind of operation. The system consists of the simulation of the surgery using a haptic device and a subsequent 3D visual inspection of the surgical trajectory. Our main objective was to proof that the tactile sensation produced by our system was enough realistic for the surgeons. We carried out a demonstration session in a medical workshop where all surgeons attending the workshop used the system with a very enthusiastic response about the perception experimented through the system.
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    A GPU Based Method for the Automatic Generation of Near-Optimal Navigation Meshes
    (The Eurographics Association, 2012) Oliva, Ramon; Pelechano, Nuria; Isabel Navazo and Gustavo Patow
    In this paper we present a novel, robust and efficient GPU based technique to automatically generate a Navigation Mesh for complex 3D scenes. Our method consists of two steps: firstly, starting with a 3D scene representing a complex environment of one floor with slopes, steps, and other obstacles, it automatically generates a 2D representation based on a single polygon (floor) with holes (obstacles).This step can handle degeneracies of the starting 3D scene model, such as interpenetrating geometry. Secondly, a novel method that exploits the GPU efficiency is used to automatically generate a near-optimal convex decomposition which will represent the cell and portal graph of the environment. Such convex decomposition is a 2D representation of the walkable areas of the environment with portals indicating the crossing borders. The results show that the presented technique not only is more robust than previous CPU methods, but also for the tested environments with up to 1000 vertices, it performs five times faster.
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    An Application to Interact with 3D Models Reconstructed from Medical Images
    (The Eurographics Association, 2012) Paulano, F.; Pulido, R.; Jiménez, J. J.; Isabel Navazo and Gustavo Patow
    Although the reconstruction of 3D models from medical images is not an easy task, there are many algorithms to perform it. However, the reconstructed models are usually large, have a lot of outliers and have not a correct topology. For that reason, the algorithms used to interact with them must be fast and robust. In this paper, we present an application that enables the interaction with models reconstructed from medical images. The application uses Marching Cubes to generate triangle soups from the medical images. Then, the user can define models by selecting a set of triangles. Once the models have been defined, the application allows to interact with them. In addition, a detailed collision detection is calculated between the models in the scene in order not only to avoid that models in the scene collide, but also to determine which triangles are overlapping. In addition, the calculation of distances and nearest points provides visual aid when the user is interacting with the models.
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    Locating Companies in 3D Urban Environments on the Internet
    (The Eurographics Association, 2012) Estrella, Ana M. López; Ortega, M. Dolores Robles; Alvarado, Lidia Ortega; Higueruela, Francisco R. Feito; Isabel Navazo and Gustavo Patow
    3D visualization is being incorporated in a lot of fields, including Geographic Information Systems (GIS). In addition, the Internet is the most popular method to find information, due to its accessibility. For this reason, most companies and businesses are interested in showing their products on the Web to make them well-known to many people. Considering all these concepts, this paper explains the process of developing a web application prototype with some GIS features. The main goal is to obtain business information, the location and the 2.5D navigation in an urban environment. In this way, through a web browser, the user will be able to search for companies by category, get information and see the scene from different levels of detail.
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    Bringing Direct Local Control to Interactive Visual Editing of Procedural Buildings
    (The Eurographics Association, 2012) Riu, Adria; Patow, Gustavo; Isabel Navazo and Gustavo Patow
    This paper presents a new system to add direct and persistent local control to the visual editing of rules for procedural buildings, avoiding a combinatorial explosion of grammar rules. In this paper we follow the ideas initially proposed by Lipp and co-workers [LWW08]. For this, we have added a few simple new commands, which are added to the artist-provided ruleset in a way completely transparent to the user. The end-user selects the primitives/assets to modify, and the system automatically incorporates these modifications into the ruleset. This change is performed using graph-rewriting techniques, which are both simple to define and control, but also very powerful and practical for these situations.
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    Visual Language Generalization for Procedural Modeling of Buildings
    (The Eurographics Association, 2012) Barroso, Santiago; Patow, Gustavo; Isabel Navazo and Gustavo Patow
    Procedural modeling has become the accepted standard for the creation of detailed large scenes, in particular urban landscapes. With the introduction of visual languages there has been a huge leap forward in terms of usability, but there is still need of more sophisticated tools to simplify the development process. In this paper we present extensions to the visual modeling of procedural buildings, which adapt concepts from general purpose programming languages, with the objective of providing higher descriptive power. In particular, we present the concepts of visual modules, parameter linking and the possibility to seamlessly add abstract parameter templates to the designer visual toolbox. We base our demonstrations on a new visual language created for volume-based models like historic architectonic structures (aqueducts, churches, cathedrals, etc.), which cannot be modeled as 2D facades because of the intrinsic volumetric structure of these construction (e.g. vaults or arches).
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    Differential Ray Marching
    (The Eurographics Association, 2012) Muñoz, Adolfo; Isabel Navazo and Gustavo Patow
    Several participating media rendering algorithms are based on ray marching: they integrate the variations of radiance along the volume covered by the participating media by splitting the path of light into segments and sampling light contribution at each of those segments. This paper revisits the concept of ray marching not as an integration technique, but as the application of a numerical method to solve an initial value differential equation. We present how to apply different numerical methods as ray marching techniques, analyze a wide range of them and study their applicability under different scenarios. Furthermore, we show how each of them improves over traditional ray marching. Any participating media rendering algorithm that is based on ray marching will benefit from the application of our technique by reducing the number of needed samples (and therefore, rendering time) and/or increasing accuracy.
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    Generating Coherent Ray Directions in Path Tracing
    (The Eurographics Association, 2012) Torres, Roberto; Martín, Pedro J.; Gavilanes, Antonio; Isabel Navazo and Gustavo Patow
    The quality of the images produced by a global illumination rendering engine is highly connected to the number of paths that are randomly generated from the camera to the light sources. Graphics Processing Units (GPUs) have been used to implement renderers by typically binding each thread to a ray. Nevertheless, this purely random generation does not fit well on the architecture of current GPUs, due to their SIMD nature. We modify the way paths are extended in order to take the most of GPUs. The arrangement of rays is split into groups of contiguous rays. The hemisphere on each intersection point is divided into spherical patches, and the same patch is chosen for all the rays in the group. The next direction for each path will be randomly chosen on that patch. Thus, if the intersection points of a group are near, the new rays spawned will be similar. We have implemented different configurations of this idea on a path tracer in CUDA and they have been experimentally tested on usual scenes. In the same amount of time, most of our algorithms complete more paths and, therefore, they produce images of higher quality than those obtained by the purely random generation.
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    Analysis of Coded Apertures for Defocus Deblurring of HDR Images
    (The Eurographics Association, 2012) Garcia, Luis; Presa, Lara; Gutierrez, Diego; Masia, Belen; Isabel Navazo and Gustavo Patow
    In recent years, research on computational photography has reached important advances in the field of coded apertures for defocus deblurring. These advances are known to perform well for low dynamic range images (LDR), but nothing is written about the extension of these techniques to high dynamic range imaging (HDR). In this paper, we focus on the analysis of how existing coded apertures techniques perform in defocus deblurring of HDR images. We present and analyse three different methods for recovering focused HDR radiances from an input of blurred LDR exposures and from a single blurred HDR radiance, and compare them in terms of the quality of their results, given by the perceptual metric HDR-VDP2. Our research includes the analysis of the employment of different statistical deconvolution priors, made both from HDR and LDR images, performing synthetic experiments as well as real ones.
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    Interactive Generation of (Paleontological) Scientific Illustrations from 3D-models
    (The Eurographics Association, 2012) Schäfer, Sebastian; Knopp, Christoph; Krömker, Detlef; Isabel Navazo and Gustavo Patow
    Scientific illustrations play an important role in the paleontological domain and are complex illustrations that are manually drawn. The artist creates illustrations that feature common expressive painting techniques: outlines, both irregular and periodic stippling as well as an abstract shaded surface in the background. We present a semiautomatic tool to generate these illustrations from 3D-models in real-time. It is based on an extensible GPU-based pipeline to interactively render characteristic into image-layers that are combined in an image-editing fashion. The user can choose the techniques used to render each layer and manipulate its key aspects. Using 3D- and 2D-painting the artist can still interact with the result and adjust it to his or her liking.
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    Design of an Information System for Cultural Heritage
    (The Eurographics Association, 2012) Soler, Francisco; Torres, Juan Carlos; León, Alejandro J.; Luzon, M. Victoria; Isabel Navazo and Gustavo Patow
    Usually the information that must be managed by archaeologist for any cultural heritage artefact is very heterogeneous. Due to its spatial nature this information cannot be easily represented with conventional data management frameworks. The strong spatial dependence of data concerning the object of study makes it interesting to have a three-dimensional model of the artefact to associate the large amount of information available. This paper presents a 3D information system that has been designed to manage cultural heritage information. The system allows to associate information layer to the artefact surface, following a GIS like approach. The association of information to the surface of the object allows to find out spatial relationships between different elements, making it easier to understand this information to both specialists and general public. The paper describes the system structure and functionality.
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    A Procedural Modeling System for the Creation of Huge Models
    (The Eurographics Association, 2012) Cubero, Francisco; Mas, Albert; Patow, Gustavo; Isabel Navazo and Gustavo Patow
    This paper presents a new general purpose procedural geometrical modeling system. It is focused on providing flexibility, modularity and scalability. Furthermore, it is taylored to manage huge geometric models, with millions of polygons. An out-of-core memory management system assures that any scene size can be generated during the modeling evolution. This generation is performed by a set of rules and operations on geometrical objects, organized as a directed acyclic graph.
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    PrimeSense Sensors as a Low-cost Method for Motion Capture on Clinical Tests
    (The Eurographics Association, 2012) Sanmartín, G.; Flores, J.; Arias, P.; Cudeiro, J.; Méndez, R.; Isabel Navazo and Gustavo Patow
    Virtual Reality (VR) is the computer recreation of simulated environments that create on the user a sense of physical presence. VR provides the advantages of being highly flexible and controllable, allowing experts to generate the optimal conditions for any given test and isolating any desired variables in the course of an experiment. An important feature of VR is that it allows interaction within the virtual world. Motion capture is one of the most popular technologies, because it contributes to creating in the subject the sense of presence. There are several methods to incorporate these techniques into an VR system, with the challenge of them not being too invasive. We propose a method using PrimeSense sensors and several computer vision techniques to build a low-cost system that has proven to be valid in its application as a support therapy for Parkinson's disease (PD) patients.
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    Design of a Scalable System for the Sensorization of Virtual TV Sets with Live Broadcast
    (The Eurographics Association, 2012) Méndez, Roi; Sanmartín, Gabriel; Mera, David; Flores, Julián; Castelló, Enrique; Isabel Navazo and Gustavo Patow
    The sensorization of virtual tv sets using motion capture systems allows the automation of many of the processes implied in the live broadcast of a tv show. It facilitates the tasks of both the actor (allowing him to interact with the environment) and the technicians (camera position and orientation, real objects position, etc.). Adding new sensors usually derives in an increase of the load of the render computer and therefore a decrease in the frame rate. This increase in the load is due to the captured data processing and its application to the scene, that must be computed in parallel to the render by the same computer. This article presents a centralized hardware and software architecture that allows the addition of an unlimited number of sensors without directly affecting the frame rate of the render. The system centralizes in a single PC all the data captured by the different sensors, giving a suitable format to this data and updating the appropriate variables across the network transparently to the rendering program, keeping a stable and unaffected render time.
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    A Survey on Development Tools for Mobile Augmented Reality
    (The Eurographics Association, 2012) Rovelo, Gustavo; Abad, Francisco; Camahort, Emilio; Isabel Navazo and Gustavo Patow
    Augmented Reality (AR) applications have become more popular beyond the research laboratory due to recent technological breakthroughs in computer hardware and mobile devices. Users are starting to interact with virtual content mixed with real environments at their offices, homes, and schools using their mobile phones. For this growing market, developers have first to decide the platform in which they will develop the application (e.g. Apple iOS or Android). Then they must decide whether start writing the application from scratch using only platform native tools, or using one of the available Software Development Kits (SDKs), or using high-level authoring tools for the chosen platform. Besides, developers have to face different AR related issues according to the application's requirements: markers, barcodes or general image tracking, geolocation, efficient rendering of 3D objects, and designing a robust GUI for the target devices. To help developers and researchers to start writing mobile AR applications, this survey identifies the main features of several freeware and commercial SDKs and authoring tools.
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    WebGL-based Visualization of Voxelized Brain Models
    (The Eurographics Association, 2012) Torre, J. Cruz de la; Ibáñez, J. Jiménez; Estrella, A. M. López; Miras, J. Ruiz de; Isabel Navazo and Gustavo Patow
    This work presents our preliminary results on the interactive construction and visualization of voxelized brain models into Web platforms by using WebGL. Our voxel model is a non-usual level of detail (LOD) representation based on the box-counting algorithm used to calculate the fractal dimension of 3D brain images. Our results to date show a promising solution based on a client-server approach.
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    Teaching Tool for Self-learning and Self-evaluation of Human Anatomy Using 3D Models of Human Bones
    (The Eurographics Association, 2012) Pamos, Miguel Á.; Segura, Rafael; Isabel Navazo and Gustavo Patow
    In this research, it's going to introduce the process we have applied by development an application intended to students of Physioteraphy Studies, The proccess is divided by three sub-process: scanning bones, processing models and developing the software application. As a result, we have found a useful and user friendly desktop application which increases the knowledge of the students about the course of General Anatomy of the University of Jaén.
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    Point Cloud Visualization from Large-range Scanner in Android Devices
    (The Eurographics Association, 2012) Pamos, Miguel Á.; Segura, Rafael; Isabel Navazo and Gustavo Patow
    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
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    3D Interaction with Smartphone-like Devices
    (The Eurographics Association, 2012) Rodríguez, A.; León, A.; Torres, J. C.; Isabel Navazo and Gustavo Patow
    3D applications require a series of 3D operations that are difficult to perform with the traditional interaction devices such as mouse and keyboard. In this paper we present a new 3D interaction system using smartphone-like devices
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    Design of a Game Creation Environment
    (The Eurographics Association, 2012) Chover, M.; Folch, F.; González, C.; Gumbau, J.; Quirós, R.; Rebollo, C.; Remolar, I.; Sánchez, I.; Isabel Navazo and Gustavo Patow
    There are many tools nowadays for videogame development. Generally, this kind of tools have been created for users with programming skills. This restriction, although is useful to programmers, excludes other professionals like graphics artists or designers. For this reason we propose an intuitive and simple environment that let professionals to design videogames without any programming knowledge. Our design allows to develop complex games visually without writing a single line of code, allowing to create game objects (actors) with complex interaction. The work uses a visual approach with diagrams for the specification of rules which are be defined without need of programming.
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    Management of 3D Geometry on Portable Devices
    (The Eurographics Association, 2012) Martínez, José Olmos; Romero, Francisco Ramos; Gonzalez, Carlos; Isabel Navazo and Gustavo Patow
    The mobile devices has evolutioned quickly in the recent years. The Games industry realized the great potential of these devices and made many developments whose requirements makes devices reach their hardware limits so there is a need to improve performance. One way is to study different forms for efficient 3D models visualizations.
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    Evaluating Three Versions of an Augmented Reality Mobile Game about Recycling
    (The Eurographics Association, 2012) Furió, D.; Juan, M.-Carmen; Alem, L.; Ashworth, P.; Isabel Navazo and Gustavo Patow
    We present three versions of an Augmented Reality (AR) game (basic, collaborative and competitive) for changing people attitudes with regard to climate change. We present a study in which twenty-eight primary school students have participated. To explore the extent to which the three AR game versions affected different aspects, the children had to answer questionnaires. The results did not show significant differences between the three versions. However, having into account the means and children preference, the competitive version could have had more influence on the participants.
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    Interactive Virtual Tours with Panoramic Video
    (The Eurographics Association, 2012) Pérez, J.; Tamayo, I.; Garcia, J.; Isabel Navazo and Gustavo Patow
    This paper presents the work being carried out in the context of 360IN project for the development of an interactive platform for panoramic video on the web. The purpose of this platform is to have an application where the user can perform interactive virtual tours and get extra information concerning points of interest that are in the course.
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    Kinamo: Gait Analysis System
    (The Eurographics Association, 2012) Martínez, H.; Gil-Gómez, J. A.; Martínez-Gramage, J.; Juan, M. C.; Isabel Navazo and Gustavo Patow
    The gait analysis is a fundamental technique for functional assessment of patients with gait problems. This analysis is generally available to few patients because the systems needed to carry it out have a high cost. In this paper, we present a novel system, Kinamo, which allows to decrease drastically the cost when performing the gait analysis using Kinect cameras, which not only allows the reduction of cost, but also facilitates the acquisition conditions.
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    Tracking for Virtual Environment using Kinect
    (The Eurographics Association, 2012) Sánchez, M. García; Salas, A. León; Cantero, J. C. Torres; Isabel Navazo and Gustavo Patow
    Los sistemas de tracking magnético suelen tener alcance limitado y presenta problemas de interferencias. En este trabajo proponemos utilizar los sensores de kinect para realizar el tracking en sistemas HMD.
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    Computing Curvature Information on 3D Meshes from Cultural Heritage Artifacts
    (The Eurographics Association, 2012) López, L.; Torres, J. C.; Soler, F.; Isabel Navazo and Gustavo Patow
    The curvature provides essential information about the features of a object surface. This poster presents an operation that makes it possible to generate the curvature information in the CHiSEL system.
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    Population Dynamics Visualization
    (The Eurographics Association, 2012) Lozano, Miguel; García-Fernández, Ignacio; Orduña, Juan Manuel; Isabel Navazo and Gustavo Patow
    In this work we present a graphic, interactive system to validate population dynamics models through hypothesis (simulation results) and radiocarbon samples selection and process. The goal of the graphical tool is to allow the combination of different hypotheses (on the wavefront speed) in a single scenario, so that a more preceise selection of radiocarbon samples reduces global error of the mathematical model.
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    Method of 3D Reconstruction using Silhouettes
    (The Eurographics Association, 2012) Villen, J. D. Gomez; Isabel Navazo and Gustavo Patow
    The present work has the aim of obtain the 3D model of simple objects by means of computer vision techniques. The method employed photographs taken around the object, then the silhouette is extracted and it is used to determine the 3D model in CAD software. Finally the 3D representation of the object is obtained.
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    Multi-resolution Myocardial Architecture Study
    (The Eurographics Association, 2012) Poveda, F.; Gil, D.; Gurgui, T.; Marti, E.; Isabel Navazo and Gustavo Patow
    Myocardial complexity has lead to vivid controversy in the interpretation of the cardiac form and function over the years. This complexity has not been clarified yet even with the most recent computational reconstructions of low level MRI data.We propose a data-based multi-resolution methodology and validation to tackle this problem.
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    Lineal Hull: Two Algorithms for Convex Hull
    (The Eurographics Association, 2012) Sánchez, M. García; Salas, A. León; Cantero, J. C. Torres; Isabel Navazo and Gustavo Patow
    This poster proposes a concept that improves the existing algorithms for convex hull. This concept can be applied whether the initial points are sorted or not. The results show a comparation with Quick-Hull (QH) [BDH96]
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    Modular Design of Graph Theory Based Software for Scientific Applications and Education
    (The Eurographics Association, 2012) Sampedro, Frederic; Puig, Anna; Benseny, Antoni; Isabel Navazo and Gustavo Patow
    This work describes a new software design approach in graph theory applications. Sometimes, while using or teaching applications related to this subject, one of the main drawbacks is to define the application-specific graph and easily process and visualize it in a computer. A generic and flexible graph processing and visualization engine is presented. It is focused on a modular scheme, allowing a multidisciplinary framework in a technology-aware platform. We present the power of this tool in computer science courses that include graph algorithms and data structures. However, major potential is achieved within applications in other scientific fields. Since it is well-known that Information Technology (IT) is becoming an essential requirement in most scientific disciplines, we describe the impact of the easy incorporation of the proposed framework in different fields.
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    Non-rigid 3D Faces Registration using Geodesic Distance Maps
    (The Eurographics Association, 2012) Gurguí, T.; Poveda, F.; Martí, E.; Isabel Navazo and Gustavo Patow
    3D facial mesh registration is a key step in 3D facial analisys. This process calculates a mapping between faces in order to put in correspondence each point of both faces. In this poster we introduce a new approach for 3D face registration based in geodesical distances and 2D non-rigid registration.
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    From the Patient to the Surgery - A Complete Computer Vision and Graphics Process
    (The Eurographics Association, 2012) Martinez, A.; Jimenez, J.; Isabel Navazo and Gustavo Patow
    Generating digital information ready to use on a surgery operation from a patient is a complex process. This process involves computer vision techniques, in order to extract digital information from medical images, and computer graphics techniques in order to generate proper models to interact with the digital information. In this approach a set of techniques covering both fields (computer vision and graphics) have been used to develop a complete process from the medical image to the surgery training.