Italian Chapter Conference 2006

Permanent URI for this collection

https://diglib7.eg.org/handle/10.2312/910
Catania, Italy

BibTeX (Italian Chapter Conference 2006)
@inproceedings{
10.2312:LocalChapterEvents/ItalianChapConf2006/007-013,

booktitle = {
4th Eurographics Italian Chapter Conference},

editor = {
S. Battiato and G. Gallo and F. Stanco
},
title = {{
Topological, Geometric and Structural Approaches to Enhance Shape Information}},

author = {
Attene, M.
 and 
Biasotti, S.
 and 
Mortara, M.
 and 
Patané, G.
 and 
Spagnuolo, M.
 and 
Falcidieno, B.
},
year = {
2006},

publisher = {
The Eurographics Association},


ISBN = {3-905673-58-4},

DOI = {
10.2312/LocalChapterEvents/ItalianChapConf2006/007-013}

}
@inproceedings{
10.2312:LocalChapterEvents/ItalianChapConf2006/023-028,

booktitle = {
4th Eurographics Italian Chapter Conference},

editor = {
S. Battiato and G. Gallo and F. Stanco
},
title = {{
Sub-part correspondence using structure and geometry}},

author = {
Biasotti, S.
 and 
Marini, S.
},
year = {
2006},

publisher = {
The Eurographics Association},


ISBN = {3-905673-58-4},

DOI = {
10.2312/LocalChapterEvents/ItalianChapConf2006/023-028}

}
@inproceedings{
10.2312:LocalChapterEvents/ItalianChapConf2006/015-021,

booktitle = {
4th Eurographics Italian Chapter Conference},

editor = {
S. Battiato and G. Gallo and F. Stanco
},
title = {{
SVG Vectorization by Statistical Region Merging}},

author = {
Battiato, S.
 and 
Farinella, G. M.
 and 
Puglisi, G.
},
year = {
2006},

publisher = {
The Eurographics Association},


ISBN = {3-905673-58-4},

DOI = {
10.2312/LocalChapterEvents/ItalianChapConf2006/015-021}

}
@inproceedings{
10.2312:LocalChapterEvents/ItalianChapConf2006/037-043,

booktitle = {
4th Eurographics Italian Chapter Conference},

editor = {
S. Battiato and G. Gallo and F. Stanco
},
title = {{
Shape Comparison and Deformation Analysis in Biomedical Applications}},

author = {
Colantonio, S.
 and 
Moroni, D.
 and 
Salvetti, O.
},
year = {
2006},

publisher = {
The Eurographics Association},


ISBN = {3-905673-58-4},

DOI = {
10.2312/LocalChapterEvents/ItalianChapConf2006/037-043}

}
@inproceedings{
10.2312:LocalChapterEvents/ItalianChapConf2006/045-051,

booktitle = {
4th Eurographics Italian Chapter Conference},

editor = {
S. Battiato and G. Gallo and F. Stanco
},
title = {{
Multi-resolution Morphological Representation of Terrains}},

author = {
Danovaro, E.
 and 
Floriani, L. De
 and 
Vitali, M.
 and 
Papaleo, L.
},
year = {
2006},

publisher = {
The Eurographics Association},


ISBN = {3-905673-58-4},

DOI = {
10.2312/LocalChapterEvents/ItalianChapConf2006/045-051}

}
@inproceedings{
10.2312:LocalChapterEvents/ItalianChapConf2006/029-035,

booktitle = {
4th Eurographics Italian Chapter Conference},

editor = {
S. Battiato and G. Gallo and F. Stanco
},
title = {{
Easy Access to Huge 3D Models ofWorks of Art}},

author = {
Callieri, M.
 and 
Ponchio, F.
 and 
Cignoni, P.
 and 
Scopigno, R.
},
year = {
2006},

publisher = {
The Eurographics Association},


ISBN = {3-905673-58-4},

DOI = {
10.2312/LocalChapterEvents/ItalianChapConf2006/029-035}

}
@inproceedings{
10.2312:LocalChapterEvents/ItalianChapConf2006/053-059,

booktitle = {
4th Eurographics Italian Chapter Conference},

editor = {
S. Battiato and G. Gallo and F. Stanco
},
title = {{
Shape Reconstruction with Uncertainty}},

author = {
Papaleo, L.
 and 
Puppo,  E.
},
year = {
2006},

publisher = {
The Eurographics Association},


ISBN = {3-905673-58-4},

DOI = {
10.2312/LocalChapterEvents/ItalianChapConf2006/053-059}

}
@inproceedings{
10.2312:LocalChapterEvents/ItalianChapConf2006/083-089,

booktitle = {
4th Eurographics Italian Chapter Conference},

editor = {
S. Battiato and G. Gallo and F. Stanco
},
title = {{
A Natural and Effective Calibration of the CyberGlove}},

author = {
Partipilo, S.
 and 
Felice, F. De
 and 
Renna, F.
 and 
Attolico, G.
 and 
Distante, A.
},
year = {
2006},

publisher = {
The Eurographics Association},


ISBN = {3-905673-58-4},

DOI = {
10.2312/LocalChapterEvents/ItalianChapConf2006/083-089}

}
@inproceedings{
10.2312:LocalChapterEvents/ItalianChapConf2006/075-081,

booktitle = {
4th Eurographics Italian Chapter Conference},

editor = {
S. Battiato and G. Gallo and F. Stanco
},
title = {{
VTK4AR: An Object Oriented Framework for Scientific Visualization of CAE Data in Augmented Reality}},

author = {
Bruno, F.
 and 
Caruso, F.
 and 
Ferrise, F.
 and 
Muzzupappa, M.
},
year = {
2006},

publisher = {
The Eurographics Association},


ISBN = {3-905673-58-4},

DOI = {
10.2312/LocalChapterEvents/ItalianChapConf2006/075-081}

}
@inproceedings{
10.2312:LocalChapterEvents/ItalianChapConf2006/061-067,

booktitle = {
4th Eurographics Italian Chapter Conference},

editor = {
S. Battiato and G. Gallo and F. Stanco
},
title = {{
Topological Descriptor for CAD Models with Inner Cavities}},

author = {
Symonova, O.
 and 
Dao, M.-S.
 and 
Amicis, R. De
 and 
Ucelli, G.
},
year = {
2006},

publisher = {
The Eurographics Association},


ISBN = {3-905673-58-4},

DOI = {
10.2312/LocalChapterEvents/ItalianChapConf2006/061-067}

}
@inproceedings{
10.2312:LocalChapterEvents/ItalianChapConf2006/069-073,

booktitle = {
4th Eurographics Italian Chapter Conference},

editor = {
S. Battiato and G. Gallo and F. Stanco
},
title = {{
An Experimental Setup to Evaluate the Performance of Tone Mapping Algorithms}},

author = {
Marsi, S.
 and 
Impoco, G.
 and 
Ukovich, A.
 and 
Ramponi, G.
},
year = {
2006},

publisher = {
The Eurographics Association},


ISBN = {3-905673-58-4},

DOI = {
10.2312/LocalChapterEvents/ItalianChapConf2006/069-073}

}
@inproceedings{
10.2312:LocalChapterEvents/ItalianChapConf2006/105-109,

booktitle = {
4th Eurographics Italian Chapter Conference},

editor = {
S. Battiato and G. Gallo and F. Stanco
},
title = {{
Use of Shader Technology for Realistic Presentation of Train Prototypes in Virtual Reality}},

author = {
Gironimo, G. Di
 and 
Papa, S.
},
year = {
2006},

publisher = {
The Eurographics Association},


ISBN = {3-905673-58-4},

DOI = {
10.2312/LocalChapterEvents/ItalianChapConf2006/105-109}

}
@inproceedings{
10.2312:LocalChapterEvents/ItalianChapConf2006/099-103,

booktitle = {
4th Eurographics Italian Chapter Conference},

editor = {
S. Battiato and G. Gallo and F. Stanco
},
title = {{
3D data segmentation using a non-parametric density estimation approach}},

author = {
Castellani, U.
 and 
Cristani, M.
 and 
Murino, V.
},
year = {
2006},

publisher = {
The Eurographics Association},


ISBN = {3-905673-58-4},

DOI = {
10.2312/LocalChapterEvents/ItalianChapConf2006/099-103}

}
@inproceedings{
10.2312:LocalChapterEvents/ItalianChapConf2006/091-097,

booktitle = {
4th Eurographics Italian Chapter Conference},

editor = {
S. Battiato and G. Gallo and F. Stanco
},
title = {{
Data-Driven Facial Feature Morphing for 3D Face Synthesis}},

author = {
Zhang, Yu
},
year = {
2006},

publisher = {
The Eurographics Association},


ISBN = {3-905673-58-4},

DOI = {
10.2312/LocalChapterEvents/ItalianChapConf2006/091-097}

}
@inproceedings{
10.2312:LocalChapterEvents/ItalianChapConf2006/123-127,

booktitle = {
4th Eurographics Italian Chapter Conference},

editor = {
S. Battiato and G. Gallo and F. Stanco
},
title = {{
A study on textures and their perceptual visual dimensions as application for flexible and effective scientific visualization}},

author = {
Taponecco, F.
},
year = {
2006},

publisher = {
The Eurographics Association},


ISBN = {3-905673-58-4},

DOI = {
10.2312/LocalChapterEvents/ItalianChapConf2006/123-127}

}
@inproceedings{
10.2312:LocalChapterEvents/ItalianChapConf2006/111-115,

booktitle = {
4th Eurographics Italian Chapter Conference},

editor = {
S. Battiato and G. Gallo and F. Stanco
},
title = {{
Designing a Virtual Reality Game for the CAVE}},

author = {
Livatino, S.
 and 
Agerbech, V.
 and 
Johansen, A.
 and 
Johansen, B.
},
year = {
2006},

publisher = {
The Eurographics Association},


ISBN = {3-905673-58-4},

DOI = {
10.2312/LocalChapterEvents/ItalianChapConf2006/111-115}

}
@inproceedings{
10.2312:LocalChapterEvents/ItalianChapConf2006/129-135,

booktitle = {
4th Eurographics Italian Chapter Conference},

editor = {
S. Battiato and G. Gallo and F. Stanco
},
title = {{
A Survey of Digital Mosaic Techniques}},

author = {
Battiato, S.
 and 
Blasi, G. Di
 and 
Farinella, G.M.
 and 
Gallo, G.
},
year = {
2006},

publisher = {
The Eurographics Association},


ISBN = {3-905673-58-4},

DOI = {
10.2312/LocalChapterEvents/ItalianChapConf2006/129-135}

}
@inproceedings{
10.2312:LocalChapterEvents/ItalianChapConf2006/117-121,

booktitle = {
4th Eurographics Italian Chapter Conference},

editor = {
S. Battiato and G. Gallo and F. Stanco
},
title = {{
Multi-Modal Presentation of Work of Arts in Virtual Reality with Simulation of Multi-Mirror Reflection}},

author = {
Livatino, S.
 and 
Cuciti, D.
 and 
Wojciechowki, A.
},
year = {
2006},

publisher = {
The Eurographics Association},


ISBN = {3-905673-58-4},

DOI = {
10.2312/LocalChapterEvents/ItalianChapConf2006/117-121}

}
@inproceedings{
10.2312:LocalChapterEvents/ItalianChapConf2006/143-149,

booktitle = {
4th Eurographics Italian Chapter Conference},

editor = {
S. Battiato and G. Gallo and F. Stanco
},
title = {{
Solutions to 3D Building Reconstruction from Photographs}},

author = {
Farinella, G. M.
 and 
Mattiolo,  G.
},
year = {
2006},

publisher = {
The Eurographics Association},


ISBN = {3-905673-58-4},

DOI = {
10.2312/LocalChapterEvents/ItalianChapConf2006/143-149}

}
@inproceedings{
10.2312:LocalChapterEvents/ItalianChapConf2006/137-142,

booktitle = {
4th Eurographics Italian Chapter Conference},

editor = {
S. Battiato and G. Gallo and F. Stanco
},
title = {{
A New Descreening Technique in the Frequency Domain}},

author = {
Battiato, S.
 and 
Stanco, F.
},
year = {
2006},

publisher = {
The Eurographics Association},


ISBN = {3-905673-58-4},

DOI = {
10.2312/LocalChapterEvents/ItalianChapConf2006/137-142}

}
@inproceedings{
10.2312:LocalChapterEvents/ItalianChapConf2006/151-157,

booktitle = {
4th Eurographics Italian Chapter Conference},

editor = {
S. Battiato and G. Gallo and F. Stanco
},
title = {{
Hand Made 3d Modelling for the Reconstructive Study of Temple C in Selinunte : Preliminary Results}},

author = {
Gabellone, F.
},
year = {
2006},

publisher = {
The Eurographics Association},


ISBN = {3-905673-58-4},

DOI = {
10.2312/LocalChapterEvents/ItalianChapConf2006/151-157}

}
@inproceedings{
10.2312:LocalChapterEvents/ItalianChapConf2006/165-169,

booktitle = {
4th Eurographics Italian Chapter Conference},

editor = {
S. Battiato and G. Gallo and F. Stanco
},
title = {{
DentroTrento: an Example of Application of Computer Graphics to the Evolution of the Archaeological Site of Tridentum}},

author = {
Piffer, S.
 and 
Conti, G.
 and 
Girardi, G.
 and 
Ucelli, G.
 and 
Amicis, R. De
},
year = {
2006},

publisher = {
The Eurographics Association},


ISBN = {3-905673-58-4},

DOI = {
10.2312/LocalChapterEvents/ItalianChapConf2006/165-169}

}
@inproceedings{
10.2312:LocalChapterEvents/ItalianChapConf2006/159-163,

booktitle = {
4th Eurographics Italian Chapter Conference},

editor = {
S. Battiato and G. Gallo and F. Stanco
},
title = {{
Tradition and Virtuality: The Caltagirone Staircase}},

author = {
Campisi, V.
 and 
Blasi, G. Di
 and 
Gallo, G.
},
year = {
2006},

publisher = {
The Eurographics Association},


ISBN = {3-905673-58-4},

DOI = {
10.2312/LocalChapterEvents/ItalianChapConf2006/159-163}

}
@inproceedings{
10.2312:LocalChapterEvents/ItalianChapConf2006/171-175,

booktitle = {
4th Eurographics Italian Chapter Conference},

editor = {
S. Battiato and G. Gallo and F. Stanco
},
title = {{
Maya Sun Simulation of Bosnian Gravestone Virtual Model}},

author = {
Rizvic, S.
 and 
Sadzak, A.
 and 
Avdagic, Z.
 and 
Chalmers, A.
},
year = {
2006},

publisher = {
The Eurographics Association},


ISBN = {3-905673-58-4},

DOI = {
10.2312/LocalChapterEvents/ItalianChapConf2006/171-175}

}
@inproceedings{
10.2312:LocalChapterEvents/ItalianChapConf2006/189-195,

booktitle = {
4th Eurographics Italian Chapter Conference},

editor = {
S. Battiato and G. Gallo and F. Stanco
},
title = {{
3D Input devices integration in CAD environment}},

author = {
Bruno, F.
 and 
Caruso, G.
 and 
Muzzupappa, M.
},
year = {
2006},

publisher = {
The Eurographics Association},


ISBN = {3-905673-58-4},

DOI = {
10.2312/LocalChapterEvents/ItalianChapConf2006/189-195}

}
@inproceedings{
10.2312:LocalChapterEvents/ItalianChapConf2006/177-181,

booktitle = {
4th Eurographics Italian Chapter Conference},

editor = {
S. Battiato and G. Gallo and F. Stanco
},
title = {{
Recovering 3D architectural information from dense digital models of buildings}},

author = {
Spinelli, A.
 and 
Ganovelli, F.
 and 
Montani, C.
 and 
Scopigno, R.
},
year = {
2006},

publisher = {
The Eurographics Association},


ISBN = {3-905673-58-4},

DOI = {
10.2312/LocalChapterEvents/ItalianChapConf2006/177-181}

}
@inproceedings{
10.2312:LocalChapterEvents/ItalianChapConf2006/183-187,

booktitle = {
4th Eurographics Italian Chapter Conference},

editor = {
S. Battiato and G. Gallo and F. Stanco
},
title = {{
Real-time Cataract Surgery Simulation for Training}},

author = {
Agus, M.
 and 
Gobbetti, E.
 and 
Pintore, G.
 and 
Zanetti, G.
 and 
Zorcolo, A.
},
year = {
2006},

publisher = {
The Eurographics Association},


ISBN = {3-905673-58-4},

DOI = {
10.2312/LocalChapterEvents/ItalianChapConf2006/183-187}

}
@inproceedings{
10.2312:LocalChapterEvents/ItalianChapConf2006/219-224,

booktitle = {
4th Eurographics Italian Chapter Conference},

editor = {
S. Battiato and G. Gallo and F. Stanco
},
title = {{
GPU based direct illuminance values computation for interactive lighting CAD}},

author = {
Selmo, D.
 and 
Musante, F.
 and 
Rossi, M.
},
year = {
2006},

publisher = {
The Eurographics Association},


ISBN = {3-905673-58-4},

DOI = {
10.2312/LocalChapterEvents/ItalianChapConf2006/219-224}

}
@inproceedings{
10.2312:LocalChapterEvents/ItalianChapConf2006/233-239,

booktitle = {
4th Eurographics Italian Chapter Conference},

editor = {
S. Battiato and G. Gallo and F. Stanco
},
title = {{
Compressed SVG Representation of Raster Images Vectorized by DDT Triangulation}},

author = {
Battiato, S.
 and 
Greco, F.
 and 
Nicotra, S.
},
year = {
2006},

publisher = {
The Eurographics Association},


ISBN = {3-905673-58-4},

DOI = {
10.2312/LocalChapterEvents/ItalianChapConf2006/233-239}

}
@inproceedings{
10.2312:LocalChapterEvents/ItalianChapConf2006/197-203,

booktitle = {
4th Eurographics Italian Chapter Conference},

editor = {
S. Battiato and G. Gallo and F. Stanco
},
title = {{
An Architecture for Distributed Behavioral Models with GPUs}},

author = {
Chiara, R. De
 and 
Erra, U.
 and 
Scarano, V.
},
year = {
2006},

publisher = {
The Eurographics Association},


ISBN = {3-905673-58-4},

DOI = {
10.2312/LocalChapterEvents/ItalianChapConf2006/197-203}

}
@inproceedings{
10.2312:LocalChapterEvents/ItalianChapConf2006/205-211,

booktitle = {
4th Eurographics Italian Chapter Conference},

editor = {
S. Battiato and G. Gallo and F. Stanco
},
title = {{
Preparation of Finite Element Models: The Use of an a Posteriori Mechanical Criterion}},

author = {
Ferrandes, R.
 and 
Marin, P. M.
 and 
Léon, J-C.
 and 
Giannini, F.
},
year = {
2006},

publisher = {
The Eurographics Association},


ISBN = {3-905673-58-4},

DOI = {
10.2312/LocalChapterEvents/ItalianChapConf2006/205-211}

}
@inproceedings{
10.2312:LocalChapterEvents/ItalianChapConf2006/213-218,

booktitle = {
4th Eurographics Italian Chapter Conference},

editor = {
S. Battiato and G. Gallo and F. Stanco
},
title = {{
Implementing Mesh-Based Approaches for Deformable Objects on GPU}},

author = {
Ranzuglia, G.
 and 
Cignoni, P.
 and 
Ganovelli, F.
 and 
Scopigno, R.
},
year = {
2006},

publisher = {
The Eurographics Association},


ISBN = {3-905673-58-4},

DOI = {
10.2312/LocalChapterEvents/ItalianChapConf2006/213-218}

}
@inproceedings{
10.2312:LocalChapterEvents/ItalianChapConf2006/225-231,

booktitle = {
4th Eurographics Italian Chapter Conference},

editor = {
S. Battiato and G. Gallo and F. Stanco
},
title = {{
From Skull to Face: an Improved Framework for Ethnically Faithful 3D Face Reconstruction}},

author = {
Abate, A. F.
 and 
Nappi, M.
 and 
Ricciardi, S.
 and 
Sabatino, G.
},
year = {
2006},

publisher = {
The Eurographics Association},


ISBN = {3-905673-58-4},

DOI = {
10.2312/LocalChapterEvents/ItalianChapConf2006/225-231}

}
@inproceedings{
10.2312:LocalChapterEvents/ItalianChapConf2006/263-266,

booktitle = {
4th Eurographics Italian Chapter Conference},

editor = {
S. Battiato and G. Gallo and F. Stanco
},
title = {{
3D CT Segmentation for Clinical Evaluation of Knee Prosthesis Operations}},

author = {
Battiato, S.
 and 
Bosco, C.
 and 
Farinella, G. M.
 and 
Impoco, G.
},
year = {
2006},

publisher = {
The Eurographics Association},


ISBN = {3-905673-58-4},

DOI = {
10.2312/LocalChapterEvents/ItalianChapConf2006/263-266}

}
@inproceedings{
10.2312:LocalChapterEvents/ItalianChapConf2006/255-261,

booktitle = {
4th Eurographics Italian Chapter Conference},

editor = {
S. Battiato and G. Gallo and F. Stanco
},
title = {{
Unambiguous Analysis of Woman Breast Shape for Plastic Surgery Outcome Evaluation}},

author = {
Farinella, G. M.
 and 
Impoco, G.
 and 
Gallo, G.
 and 
Spoto, S.
 and 
Catanuto, G.
},
year = {
2006},

publisher = {
The Eurographics Association},


ISBN = {3-905673-58-4},

DOI = {
10.2312/LocalChapterEvents/ItalianChapConf2006/255-261}

}
@inproceedings{
10.2312:LocalChapterEvents/ItalianChapConf2006/241-246,

booktitle = {
4th Eurographics Italian Chapter Conference},

editor = {
S. Battiato and G. Gallo and F. Stanco
},
title = {{
Color Palette Images Re-indexing by Self Organizing Motor Maps}},

author = {
Battiato, S.
 and 
Rundo, F.
 and 
Stanco, F.
},
year = {
2006},

publisher = {
The Eurographics Association},


ISBN = {3-905673-58-4},

DOI = {
10.2312/LocalChapterEvents/ItalianChapConf2006/241-246}

}
@inproceedings{
10.2312:LocalChapterEvents/ItalianChapConf2006/273-277,

booktitle = {
4th Eurographics Italian Chapter Conference},

editor = {
S. Battiato and G. Gallo and F. Stanco
},
title = {{
Using Layout Profiles in MPE G-4 Hypervideo Presentation}},

author = {
Bue, A. Lo
},
year = {
2006},

publisher = {
The Eurographics Association},


ISBN = {3-905673-58-4},

DOI = {
10.2312/LocalChapterEvents/ItalianChapConf2006/273-277}

}
@inproceedings{
10.2312:LocalChapterEvents/ItalianChapConf2006/247-253,

booktitle = {
4th Eurographics Italian Chapter Conference},

editor = {
S. Battiato and G. Gallo and F. Stanco
},
title = {{
Adaptive Frame Rate Up-conversion with Motion Extraction from 3D Space for 3D Graphic Pipelines}},

author = {
Falchetto, M.
 and 
Barone, M.
 and 
Pau, D.
},
year = {
2006},

publisher = {
The Eurographics Association},


ISBN = {3-905673-58-4},

DOI = {
10.2312/LocalChapterEvents/ItalianChapConf2006/247-253}

}
@inproceedings{
10.2312:LocalChapterEvents/ItalianChapConf2006/267-271,

booktitle = {
4th Eurographics Italian Chapter Conference},

editor = {
S. Battiato and G. Gallo and F. Stanco
},
title = {{
Smart Ideas for Photomosaic Rendering}},

author = {
Blasi, G. Di
 and 
Gallo, G.
 and 
Petralia, M.P.
},
year = {
2006},

publisher = {
The Eurographics Association},


ISBN = {3-905673-58-4},

DOI = {
10.2312/LocalChapterEvents/ItalianChapConf2006/267-271}

}
@inproceedings{
10.2312:LocalChapterEvents/ItalianChapConf2006/279-283,

booktitle = {
4th Eurographics Italian Chapter Conference},

editor = {
S. Battiato and G. Gallo and F. Stanco
},
title = {{
A Message-Based Annotation System for Collaborative Design Review}},

author = {
Witzel, M.
 and 
Conti, G.
 and 
Amicis, R. De
},
year = {
2006},

publisher = {
The Eurographics Association},


ISBN = {3-905673-58-4},

DOI = {
10.2312/LocalChapterEvents/ItalianChapConf2006/279-283}

}

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    Topological, Geometric and Structural Approaches to Enhance Shape Information
    (The Eurographics Association, 2006) Attene, M.; Biasotti, S.; Mortara, M.; Patané, G.; Spagnuolo, M.; Falcidieno, B.; S. Battiato and G. Gallo and F. Stanco
    Nowadays, the increasing power of hardware components has made available a huge amount of digital models, more and more complex and detailed, as needed in many innovative research fields such as medical imaging, entertainment, product modelling and design. In this scenario, both industry and academy feel an urgent need of tools to efficiently describe, recognise and retrieve shapes, which usually require to enhance the raw geometry with additional high-level shape information. Analyzing and enhancing geometry is the basis for an efficient understanding of shapes, and has been for many years one of the most challenging issues at IMATI-GE/CNR. Recent advances in the field of semantic-based knowledge systems dealing with multi-dimensional media boosted this research field significantly, and the Shape Modeling Group at IMATI-GE/CNR produced several innovative methods that are reviewed in this paper. Approaches are classified and described along with some results, and discussed with respect to applications. Open issues are outlined along with future research plans.
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    Sub-part correspondence using structure and geometry
    (The Eurographics Association, 2006) Biasotti, S.; Marini, S.; S. Battiato and G. Gallo and F. Stanco
    The paper describes a method for recognizing similar sub-parts of objects described by 3D polygonal meshes. The innovation of our method is the coupling of structure and geometry in the matching process. First of all, the structure of the shape is coded in a graph where each node is associated to a sub-part of the shape. Then, the matching between two shapes is approached using a graph-matching technique relying upon a geometric description of each sub-part.
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    SVG Vectorization by Statistical Region Merging
    (The Eurographics Association, 2006) Battiato, S.; Farinella, G. M.; Puglisi, G.; S. Battiato and G. Gallo and F. Stanco
    In this paper a novel algorithm for raster to vector conversion is presented. The technique is mainly devoted to vectorize digital picture maintaining an high degree of photorealistic appearance specifically addressed to the human visual system. The algorithm makes use of an advanced segmentation strategy based on statistical region analysis together with a few ad-hoc heuristics devoted to track boundaries of segmented regions. The final output is rendered by Standard Vector Graphics. Experimental results confirm the effectiveness of the proposed approach both in terms of perceived and measured quality. Moreover, the final overall size of the vectorized images outperforms existing methods.
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    Shape Comparison and Deformation Analysis in Biomedical Applications
    (The Eurographics Association, 2006) Colantonio, S.; Moroni, D.; Salvetti, O.; S. Battiato and G. Gallo and F. Stanco
    In this paper, we present a method for comparing shapes and analyzing deformations of 3D image objects. This method is based on the definition of an object model based on multi-source 3D images. Elective application cases of the proposed method consist of the analysis of deformable anatomical structures, useful to support medical diagnosis in routine clinical practice. In particular, preliminary aspects are discussed of a study case regarding heart dynamics.
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    Multi-resolution Morphological Representation of Terrains
    (The Eurographics Association, 2006) Danovaro, E.; Floriani, L. De; Vitali, M.; Papaleo, L.; S. Battiato and G. Gallo and F. Stanco
    Mesh-based terrain representations provide accurate descriptions of a terrain, but fail in capturing its morphological structure. The morphology of a terrain is defined by its critical points and by the critical lines joining them, which form a so-called surface network. Besides being compact, a morphological terrain description supports a knowledge-based approach to the analysis, visualization and understanding of a terrain dataset. Moreover, because of the large size of current terrain data sets, a multi-resolution representation of the terrain morphology is crucial. Here, we address the problem of representing the morphology of a terrain at different resolutions. The basis of the multi-resolution terrain model, that we call a Multi-resolution Surface Network (MSN), is a generalization operator on a surface network, which produces a simplified representation incrementally. An MSN is combined with a multi-resolution mesh-based terrain model, which encompasses the terrain morphology at different resolutions. We show how variable-resolution representations can be extracted from an MSN, and we present also an implementation of an MSN in a compact encoding data structure.
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    Easy Access to Huge 3D Models ofWorks of Art
    (The Eurographics Association, 2006) Callieri, M.; Ponchio, F.; Cignoni, P.; Scopigno, R.; S. Battiato and G. Gallo and F. Stanco
    Automatic shape acquisition technologies evolved rapidly in recent years, and huge mass of 3D data can be easily produced. The high accuracy of range scanning technology makes the Cultural Heritage domain one of the ideal fields of use of these devices. Given this particular application domain, two issues arise: how to visualize at interactive rates these complex data on commodity computers (both locally and on web), and how to improve the ease of use of the visualization tools (as potential users are often not expert with interactive graphics). We present a new visualization system designed to support easy implementation of multimedia kiosk for museums or expositions, which has also been extended to web-based usage. The system allows naive users to inspect a large complex 3D model at interactive frame rates on off-the-shelf PC s, presenting the 3D model and all the multimedia data that has been linked to selected points of its surface. A main goal in the design of the system was to provide the user with a very easy and natural interaction approach, based on a straightforward "point and click" metaphor. Visualization efficiency is obtained by adopting a continuous level-of-detail (LOD) representation, where on-line automatic selection of the best-fit level of detail (according to the current view frustum) is coupled with visibility culling and ready-to-render representation of the geometry.
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    Shape Reconstruction with Uncertainty
    (The Eurographics Association, 2006) Papaleo, L.; Puppo, E.; S. Battiato and G. Gallo and F. Stanco
    This paper presents a general Surface Reconstruction framework which encapsulates the uncertainty of the sampled data, making no assumption on the shape of the surface to be reconstructed. Starting from the input points (either points clouds or multiple range images), an Estimated Existence Function (EEF) is built which models the space in which the desired surface could exist and, by the extraction of EEF critical points, the surface is reconstructed. The final goal is the development of a generic framework able to adapt the result to different kinds of additional information coming from multiple sensors.
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    A Natural and Effective Calibration of the CyberGlove
    (The Eurographics Association, 2006) Partipilo, S.; Felice, F. De; Renna, F.; Attolico, G.; Distante, A.; S. Battiato and G. Gallo and F. Stanco
    This work addresses the calibration of the CyberGlove, a device which provides information about the position and attitude in space of all the components of the user hand in a haptic system for the fruition of digital 3D contents by blind people. A realistic haptic interaction requires a reliable detection of user movements and a good calibration of the device to account for size and articulation capability of the specific hand. At the same time the application of interest calls for a calibration procedure that should be executable in a natural and straightforward way by every user. The two methods provided by the CyberGlove software are not suitable for these purposes: one is very simple and fast but produces quite imprecise results while the other is effective and accurate but involves a complex and cumbersome trial-and-error process not suited for general users. The proposed method aims to reach satisfactory results using a intuitive and simple approach. The user is asked to assume with his hand several pre-defined poses, each supplying the sensors output associated to known joints angles. Combining these data with the constraints derived by the anatomical structure of the hand it is possible to evaluate the values of the two parameters, gain and offset, that drive the digitalization of the sensor output. This process, in spite of its simplicity, has provided satisfactory results in several experimental sessions, enabling a realistic and reliable mirroring of user movements in the virtual space.
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    VTK4AR: An Object Oriented Framework for Scientific Visualization of CAE Data in Augmented Reality
    (The Eurographics Association, 2006) Bruno, F.; Caruso, F.; Ferrise, F.; Muzzupappa, M.; S. Battiato and G. Gallo and F. Stanco
    In the last ten years many Augmented Reality (AR) applications for Scientific Visualization have been developed, attesting the effectiveness of this technique for data visualization and interaction. In all these applications, a software framework for scientific visualization was used to process data to be visualized, while an AR system was employed to display these data within an AR context. Hence, everyone who intended to approach the development of such applications should become necessarily familiar with the scientific visualization framework and the augmented reality one. This is of course an hurdle for the applications development, and the idea behind this work is exactly to provide a software framework that simplifies the development of such applications. With this in mind, we extended an existing and powerful open source library for scientific visualization (VTK) with few but useful classes for the interfacing with an existing AR library (ARToolKit) to easily handle the video see-through and the video-tracking functionalities. The resulting software tool, called VTK4AR, can be considered as an all in one software framework specific for scientific visualization in AR. Moreover, since it is built on top of VTK, it will be possible to employ a wide range of visualization techniques in many application fields. In particular, it has been tested in two AR applications: one for displaying data relative to a CFD simulation of a flow past a helmet, and another for displaying the forming error obtained prototyping an ankle support with the incremental forming technique.
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    Topological Descriptor for CAD Models with Inner Cavities
    (The Eurographics Association, 2006) Symonova, O.; Dao, M.-S.; Amicis, R. De; Ucelli, G.; S. Battiato and G. Gallo and F. Stanco
    The current work introduces an algorithm for constructing Reeb graph for CAD models and their inner cavities. The nodes of the graph represent areas of the manifold of the model where topological changes occur. Edges of the graph encode information about connections between such areas. The outline for the topological graph matching is given for detection of graph (sub)isomorphism. The proposed Reeb graph structure can be used as a descriptor of CAD models in the retrieval process.
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    An Experimental Setup to Evaluate the Performance of Tone Mapping Algorithms
    (The Eurographics Association, 2006) Marsi, S.; Impoco, G.; Ukovich, A.; Ramponi, G.; S. Battiato and G. Gallo and F. Stanco
    Many algorithms have been proposed in the literature to solve the problem of mapping tones from high dynamic range sources to low dynamics displays, while preserving the information conveyed by the original scene. Methods and tools to evaluate the performance of tone mapping algorithms are needed. Some experiments have recently been presented involving human observers. In this paper, we propose method not relying on human scoring. Wellilluminated reference pictures of challenging scenes are captured and used as references. Low-quality shots of the same scenes are enhanced using some tone mapping algorithms and the outcome is compared to the reference images using a standard colour distance measure. The results clearly favour the more sophisticated local methods.
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    Use of Shader Technology for Realistic Presentation of Train Prototypes in Virtual Reality
    (The Eurographics Association, 2006) Gironimo, G. Di; Papa, S.; S. Battiato and G. Gallo and F. Stanco
    The aim of the paper is to make up a virtual showroom and work-through of a train model in order to allow railway companies showing new trains prototypes, in phase of concept, and present their new design in more exhaustive way than simply technical documentation. The possibility of applying Virtual Reality (VR) methodologies to make a scene more realistic as possible is a great advantage for the effectiveness of the presentation, in order to increase their competitivity. Shader technology allows the programmers to have control over shape, appearance (such as colour, lighting, reflection) and animation of objects, in order to make very realistic real-time rendering. In the paper the authors describe the use of shader technology in Virtual Design 2 (VD2) for realistic presentation of train prototypes in VR. The software VD2 is an extensive tool that allows following many phases of product development, from the creation of showroom for realistic presentations supporting shader technology to the assembly simulation or ergonomics analysis. Moreover, the possibility of interfacing with a wide range of input/output devices and the possibility to access to the API made this software to be chosen for Virtual Reality applications in the VR laboratory of the Competence Center for the Qualification of Transportation Systems founded by Campania Region (www.centrodicompetenzatrasporti.unina.it).
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    3D data segmentation using a non-parametric density estimation approach
    (The Eurographics Association, 2006) Castellani, U.; Cristani, M.; Murino, V.; S. Battiato and G. Gallo and F. Stanco
    In this paper, a new segmentation approach for sets of 3D unorganized points is proposed. The method is based on a clustering procedure that separates the modes of a non-parametric multimodal density, following the mean-shift paradigm. The main idea consists in projecting the source 3D data into a set of independent sub-spaces, forming a joint multidimensional space. Each sub-space describes a geometric aspect of the data set, such as the normals and principal curvatures, so as a dense region in a particular sub-space indicates a set of 3D points sharing a similar value of that feature. A non-parametric clustering method is applied in this joint space by using a multidimensional kernel. This kernel smoothly takes into account for all the subspaces, moving towards high density regions in the joint space, separating them and providing "natural" clusters of 3D points. The algorithm can be implemented very easily and only few parameters need to be freely tuned. Experiments are reported, both on synthetic and real data, assessing the quality of the proposed approach and promoting further developments.
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    Data-Driven Facial Feature Morphing for 3D Face Synthesis
    (The Eurographics Association, 2006) Zhang, Yu; S. Battiato and G. Gallo and F. Stanco
    This paper presents a data-driven method for synthesizing new realistic 3D human faces by morphing a set of facial features. The method takes as examples 3D scanned human face models in order to exploit the shape variations presented in the real faces of individuals. We automatically compute a vertex-to-vertex correspondence between the unregistered face scans by deforming a generic mesh to fit the specific person s face geometry in a global-tolocal fashion. Exploiting the statistics of the generated datasets of feature shapes we transform them into vector space representations by applying a principal component analysis (PCA). Our feature shape morphing model is formed as a linear combination of the main modes of feature shape variations. We introduce a shape smoothing and blending method for generating a seamlessly deformed mesh around the feature borders. We demonstrate our method by combining 3D morphing of four features to generate a wide range of different face shapes.
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    A study on textures and their perceptual visual dimensions as application for flexible and effective scientific visualization
    (The Eurographics Association, 2006) Taponecco, F.; S. Battiato and G. Gallo and F. Stanco
    The use of textures is fundamental in several areas of Computer Graphics, Computer Vision and Image Processing. In this work, we focus on their main relevant attributes, in order to define and design textures as effective visual representations for use in scientific visualization. We concentrate on the problem of visualizing complex multivariate and multi-dimensional datasets as well as in synthesizing multi-fields and temporal evolution of vectorial datasets visualization. Textures features, such as directionality, color and shape are particularly suited for use in a synthesis algorithm, and they serve as effective seed primitives, which can incorporate many visual dimensions for intuitive and flexible data mapping and encoding. As special application, we propose a level-based visualization approach, with a special focus on systematic layering of information for scientific datasets.
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    Designing a Virtual Reality Game for the CAVE
    (The Eurographics Association, 2006) Livatino, S.; Agerbech, V.; Johansen, A.; Johansen, B.; S. Battiato and G. Gallo and F. Stanco
    Virtual Reality has for many years been a technology which has stagnated in application and software development for games. The applications available for VR environments have increased but they mostly remain related to scientific purposes while computer games in VR are still being developed and only show a part of their actual potential. The game industry has begun to see the possibilities of VR games in a near future with the implementation of some popular games to a CAVE system. However, a full immersion VR solution still remains uncommon and expensive. This paper aims to demonstrate the potential of VR games, and in particular games for the CAVE, now that affordable solutions are close to reach as more powerful hardware is available at low price. The focus is also on the methodology to be pursued while designing a VR game. Results were encouraging and tests performed on a first prototype demonstrates system feasibility.
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    A Survey of Digital Mosaic Techniques
    (The Eurographics Association, 2006) Battiato, S.; Blasi, G. Di; Farinella, G.M.; Gallo, G.; S. Battiato and G. Gallo and F. Stanco
    Art often provides valuable hints for technological innovations especially in the field of Image Processing and Computer Graphics. In this paper we survey in an unified framework several methods to transform a raster input image into good quality mosaics. The common and different ideas among the methods are reported and described. Finally we try to address the evaluation problem of an NPR algorithm.
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    Multi-Modal Presentation of Work of Arts in Virtual Reality with Simulation of Multi-Mirror Reflection
    (The Eurographics Association, 2006) Livatino, S.; Cuciti, D.; Wojciechowki, A.; S. Battiato and G. Gallo and F. Stanco
    The use of different media such as photography and virtual reality combined with different presentation modalities may provide a user with an extraordinary tool for exploration and appreciation of real work of art. This is especially important in case of time-spatial works-of-art where the problem of functionalities presentation becomes much more demanding. The possibility offered by latest graphics machines has attracted the interest of researchers to investigate this new area. The goal of the presented work is the creation of a multi-modal presentation of a piece of contemporary art, tightening the relation between computer graphics and arts. The focus is on an application that it is capable to cope in real-time with simulation of mirror reflections, including multi-reflections. The results were very encouraging which led to optimistic conclusions with a wide range of options for future works.
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    Solutions to 3D Building Reconstruction from Photographs
    (The Eurographics Association, 2006) Farinella, G. M.; Mattiolo, G.; S. Battiato and G. Gallo and F. Stanco
    The 3D model reconstruction of buildings from uncalibrated photographs allows new useful Computer Graphics and Computer Vision applications. In this paper we survey some solutions proposed in literature and in commerce. The common and different methodology are reported and described. Finally we try to address the 3D reconstruction problem of architectural scenes presenting our solution: BolBol. We demonstrate our reconstruction process and some results obtained applying BolBol to the modeling of real buildings.
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    A New Descreening Technique in the Frequency Domain
    (The Eurographics Association, 2006) Battiato, S.; Stanco, F.; S. Battiato and G. Gallo and F. Stanco
    In this paper a new algorithm to obtain a continuous tone image starting from a halftoned one is proposed. This descreening technique is based on Butterworth filtering in the frequency domain. It removes the pattern of the original screen leaving unchanged the colors in the image. The proposed algorithm ensures fast and effective results, and can be used also by non-qualified operators.
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    Hand Made 3d Modelling for the Reconstructive Study of Temple C in Selinunte : Preliminary Results
    (The Eurographics Association, 2006) Gabellone, F.; S. Battiato and G. Gallo and F. Stanco
    This paper illustrates the preliminary results of the virtual reconstruction of temple C in Selinunte. The reconstruction was undertaken as part of the Land-Lab Project launched by the University of Lecce in 2003 for the promotion and appropriate exploitation of the cultural, historic, artistic and archaeological heritage of two Italian regions, Puglia and Sicily, using advanced technologies. The reconstruction of temple C was launched with the help of numerous experts in the field of surveying and representation, as well as art historians, archaeologists and architects, following a fully multidisciplinary approach. The reconstructive study was conducted in a 3D environment mainly using NURBS modelling, Subdivision Surfaces and sub-polygonal displacement. Our reconstructive approach, which might be defined numerical, makes it possible to recompose, at least in the initial phases of the work, all the surveyed architectural elements in accordance with a procedure based on digital anastylosis. The reconstruction of the monument represents a contribution to the study of Doric architecture in southern Italy conducted with the help of modern technologies.
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    DentroTrento: an Example of Application of Computer Graphics to the Evolution of the Archaeological Site of Tridentum
    (The Eurographics Association, 2006) Piffer, S.; Conti, G.; Girardi, G.; Ucelli, G.; Amicis, R. De; S. Battiato and G. Gallo and F. Stanco
    This paper illustrates the DentroTrento project, commissioned by the local authority for Cultural Heritage, which has lead to the creation of an edutainment system for the visitors of an archaeological site in the town of Trento. In particular, the aim of the project was to enhance the didactic and entertaining potential of a Roman archaeological site which is located between the Theatre s foundations through the development of a computer graphics-based application capable of high visual and emotional impact. This has been made possible through the creation of an interactive system where the virtual reconstruction becomes the main means of guiding the visitor through a virtual walk across time. The relevance of the work illustrated is underlined by the profile of the project and the nature and importance of the site, which is located underground below a square. In fact this circumstance does not let the visitor perceive the urban outline of the roman town nor it lets visitors fully perceive, through the use of traditional teaching material, the way of life typical of the time. The system proposed instead engages the visitor into a more exciting experience replicating, not only the architecture, but the way of life of the Roman town. The scope of the project together with the heterogeneity of the working team has required a rigorous approach to the management of the entire project.
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    Tradition and Virtuality: The Caltagirone Staircase
    (The Eurographics Association, 2006) Campisi, V.; Blasi, G. Di; Gallo, G.; S. Battiato and G. Gallo and F. Stanco
    Computer Graphics (CG) and Virtual Reality (VR) are two of the most interesting research fields in Computer Science. In this paper we present an application of CG and VR in arts, tourist promotion and cultural heritage. We propose a technique able to simulate the Saint Mary of the Mount staircase, a magnificent staircase in Caltagirone, a beautiful baroque town in Sicily (Italy). Our system is an example of how new technologies may lead to a new way of interacting with traditional arts
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    Maya Sun Simulation of Bosnian Gravestone Virtual Model
    (The Eurographics Association, 2006) Rizvic, S.; Sadzak, A.; Avdagic, Z.; Chalmers, A.; S. Battiato and G. Gallo and F. Stanco
    Bosnia and Herzegovina is very rich with cultural heritage sites. Perhaps the most famous of these are the stecaks; the monumental gravestones of Bosnian Heretic Christians. The orientation of the stecaks was important to the ancient Bosnians, Unfortunately, their orientation towards the sun has been changed when they were moved from their original locations to more secure sites at museums. This is particularly true of the stecak from Donje Zgosce, one of the most beautiful stecaks in B&H. Using high-fidelity graphics techniques we have created a detailed virtual reconstruction of this stecak and produced a sun simulation in Maya This enables archaeologists to be able to investigate the interaction of the light with the stecak s carvings as it may have appeared in 14th century.
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    3D Input devices integration in CAD environment
    (The Eurographics Association, 2006) Bruno, F.; Caruso, G.; Muzzupappa, M.; S. Battiato and G. Gallo and F. Stanco
    Virtual Reality (VR) technologies are becoming commonly used tools in the product development process, starting from the styling review in the conceptual design phase, until to the Digital Mock-up (DMU) validation in the advanced stages of the design process. What has not yet been sufficiently investigated is the possibility to interact with the DMU directly inside the CAD environment using 3D input devices. Although few CAD systems, like CATIA V5, have an additional module to support VR devices, in most cases it is still necessary to customize the application to obtain the functionalities desired by the user. The present paper discusses difficulties and advantages related to the integration of VR techniques and 3D input devices in CAD systems. The work has been conducted analyzing and testing the potentialities of the Unigraphics NX3 CAD environment and implementing a software plug-in that allows the user to perform such interaction tasks employing 3D input devices.
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    Recovering 3D architectural information from dense digital models of buildings
    (The Eurographics Association, 2006) Spinelli, A.; Ganovelli, F.; Montani, C.; Scopigno, R.; S. Battiato and G. Gallo and F. Stanco
    In recent years the progress of 3D scanning technologies and the consequent growing commercialization of scanners opened a large spectrum of opportunities for many professionals. In particular, architects and engineers may access to a digital model of a building without having to model it using a CAD software. On the other hand, there are two important differences between the digitized and the handcrafted model. The first is the absence of interpretation. The digitized model is merely a set of polygons that describe, possibly in a very accurate manner, the scanned object. It does not provide the user with any other information about what a surface is (a wall, a window, an arch etc.) that, conversely, can be incorporated during the editing in a CAD session. The second difference is excess of realism. In the digitized models the are no planar walls, no right angles, no straight edges, simply because they are not, at the millimetric scale. Unfortunately, if a model must be used in a FEM simulation, for example, a CAD like model would be required. This paper describes an application framework and some techniques that have been implemented to help a non computer-graphics user in handling digital models of buildings acquired using 3D scanning. The techniques permit to visualize efficiently the models independently from their size, recover 3D information (measurements, sections, . . . ), extract geometric features and fit high level geometric primitives.
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    Real-time Cataract Surgery Simulation for Training
    (The Eurographics Association, 2006) Agus, M.; Gobbetti, E.; Pintore, G.; Zanetti, G.; Zorcolo, A.; S. Battiato and G. Gallo and F. Stanco
    Cataract is a clouding of the eye's natural lens, normally due to natural aging changes, and involving at least half of the population over 65 years. Cataract extraction is the only solution for restoring a clear vision, and nowadays is probably the most frequently practiced surgical procedure. This paper describes a novel virtual reality simulation system for cataract surgery training, involving the capsulorhexis and phacoemulsification tasks. The simulator runs on a multiprocessing PC platform and provides realistic physically-based visual simulations of tools interactions. The current setup employs SensAble PHANToM for simulating the interaction devices, and a binocular display for presenting images to the user.
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    GPU based direct illuminance values computation for interactive lighting CAD
    (The Eurographics Association, 2006) Selmo, D.; Musante, F.; Rossi, M.; S. Battiato and G. Gallo and F. Stanco
    In this work we focus our attention on real-time direct illuminance values computation using dedicated 3D graphics hardware compatible with OpenGL 2 standard. Our method works with real light intensity distribution measured for lighting fixtures by enconding it in a texture for GPU data comunication. Illuminance values are reprensented in real-time by using a perceptual based colour scale. Illuminance computation is limited to direct light. This is not a severe limitation for exterior and road lighting design, and nevertheless it is a useful project parameter for interior lighting design too.
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    Compressed SVG Representation of Raster Images Vectorized by DDT Triangulation
    (The Eurographics Association, 2006) Battiato, S.; Greco, F.; Nicotra, S.; S. Battiato and G. Gallo and F. Stanco
    This paper presents a portable compression algorithm applied to raster data images properly triangulated by using DDT (Data Dependent Triangulation). In particular the input source data are encoded to be rendered by standard SVG (Scalable Vector Graphics) engine. The proposed compression strategy works reducing the overall entropy implementing some heuristic strategies to properly re-code the redundancy inside the mesh representation. The compressed data are enclosed into an SVG player able to both decompress and show the original image. Results show the effectiveness of the approach.
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    An Architecture for Distributed Behavioral Models with GPUs
    (The Eurographics Association, 2006) Chiara, R. De; Erra, U.; Scarano, V.; S. Battiato and G. Gallo and F. Stanco
    We describe an architecture for massive simulation of a distributed behavioral model using graphics hardware. By leveraging on the recent programmable capabilities of GPUs we implemented the model capable of managing a large aggregate motion of birds in a virtual environment that can avoid both static and dynamic obstacles. We demonstrate the effectiveness of our GPU implementation by comparing the results to a CPU implementation and, emphasize the modularity of the proposed architecture that favors reusability in several contexts.
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    Preparation of Finite Element Models: The Use of an a Posteriori Mechanical Criterion
    (The Eurographics Association, 2006) Ferrandes, R.; Marin, P. M.; Léon, J-C.; Giannini, F.; S. Battiato and G. Gallo and F. Stanco
    A geometrical model needs to be simplified to perform a FE (Finite Element) analysis. Several tasks of shape processing are required during the FE model preparation phase. An appropriate geometric model and a suitable set of geometric and mechanical operators may significantly improve the efficiency of the whole process. Our approach is based on the use of a reference geometric model that is the polyhedral representation of a component. To simplify the component shape, we utilize some geometric operators associated to mechanical hypotheses, so that all the component shape changes take into account the mechanical hypotheses related to the FE model. Since a priori criteria acting before the FEM solving process cannot efficiently quantify the influence of a shape simplification on the accuracy of FE simulation results, a mechanical a posteriori criterion has been implemented, which analyses the impact of shape changes on the simulation to tune the simplification process. Therefore, we perform a first FE computation on the simplified model and use the results to assess the mechanical influence of shape simplifications that have acted on the model. If some details prove to have influence on the mechanical behaviour, the model on which the FE analysis is performed needs to be redefined. Therefore, we are able to adapt the model according to a desired accuracy of the analysis results. In this article, we describe all the process that has to beset up to perform this adaptive modelling of components.
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    Implementing Mesh-Based Approaches for Deformable Objects on GPU
    (The Eurographics Association, 2006) Ranzuglia, G.; Cignoni, P.; Ganovelli, F.; Scopigno, R.; S. Battiato and G. Gallo and F. Stanco
    These latest years witnessed an impressive improvement of graphics hardware both in terms of features and in terms of computational power. This improvement can be easily observed in computer games, where effects which, until few years ago, could only be achieved with expensive CPU computation are now shown interactively. Although the GPU has been designed for implementing graphics effects, it is still it basically a processing unit with its own memory, and, being specialized for algebraic tasks, supplies a number of floating point operations per second which is orders of magnitude greater than the CPU. This suggested to the graphics community that the GPU could also be used for general purpose computation and a number of papers have been published on how to hack the GPU to this target. Following this trend we propose a framework for using GPU for implementing techniques for deformable objects represented as generic meshes. The framework only assumes than the global computation is the union of local computations, which is true for all the explicit methods.
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    From Skull to Face: an Improved Framework for Ethnically Faithful 3D Face Reconstruction
    (The Eurographics Association, 2006) Abate, A. F.; Nappi, M.; Ricciardi, S.; Sabatino, G.; S. Battiato and G. Gallo and F. Stanco
    3D imagery can be a useful tool for archaeologists and anthropologists committed to the study of ancient people, helping them to better visualize the results of their theories and findings. This paper presents a methodology to generate a tridimensional model of a compatible face from its skull, and is specifically aimed to archaeological/anthropological applications. The proposed approach to facial reconstruction, that relies on craniometrical analysis and content based image retrieval technology, has two main purposes: to achieve a more ethnically faithful reproduction of main facial features respect to other techniques based on statistical data, and to allow a plausible reproduction of important physiognomic features (such as eyes, nose, lips, ears and hairs) which can t be inferred from the skull. The facial reconstruction of a female subject found in the archaeological site of Murecine (Pompei) who found death during the volcanic eruption in 79 a. C. is presented as a case study.
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    3D CT Segmentation for Clinical Evaluation of Knee Prosthesis Operations
    (The Eurographics Association, 2006) Battiato, S.; Bosco, C.; Farinella, G. M.; Impoco, G.; S. Battiato and G. Gallo and F. Stanco
    In surgical knee replacement, the damaged knee joint is replaced with artificial prostheses. An accurate clinical evaluation must be carried out before applying knee prostheses to ensure optimal outcome from surgical operations and to reduce the probability of having long-term problems. Useful information can be inferred from CT scans of the knee area, that can be used to estimate the stress that will be acting on the prosthesis being implanted. This information can be exploited to tailor the prothesis to the patient s anatomy. We present some ideas for a system intended to help surgeons in evaluating the post-operative outcome of knee prosthesis implantation. We also show some preliminary results about the 3D segmentation of CT data, that is the main activity of our lab in the project.
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    Unambiguous Analysis of Woman Breast Shape for Plastic Surgery Outcome Evaluation
    (The Eurographics Association, 2006) Farinella, G. M.; Impoco, G.; Gallo, G.; Spoto, S.; Catanuto, G.; S. Battiato and G. Gallo and F. Stanco
    This paper reports a multidisciplinary research between computer science and plastic and reconstructive surgery. In particular, a new method is proposed to unambiguously define a geometric partitioning of a large thoracic area including the breast mound. The new technique uses only well-defined anatomical points, defined and selected by surgeons. A simple sequence of geometric operations is performed to partition the breast surface into four anatomic subunits, according to clinically derived breast meridian and equator lines. Using this breast shape partition, useful measurement can be extrapolated on 3D model data set. Our method has been validated on a number of breast 3D models acquired by means of a commercial scanner on real clinical cases collected by Istituto Nazionale dei Tumori in Milan (INT).
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    Color Palette Images Re-indexing by Self Organizing Motor Maps
    (The Eurographics Association, 2006) Battiato, S.; Rundo, F.; Stanco, F.; S. Battiato and G. Gallo and F. Stanco
    Palette re-ordering is a well known and very effective approach for improving the compression of color-indexed images. If the spatial distribution of the indexes in the image is smooth, greater compression ratios may be obtained. As known, obtaining an optimal re-indexing scheme is not a simple problem. In this paper we provide a novel algorithm for palette re-ordering problem showing the advantages of using a neural network instead of classical heuristic methods. We propose to apply the Motor Map neural network which is considered an extension of the well-known SOM Kohonen neural network. Experiments confirm the effectiveness of the proposed technique.
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    Using Layout Profiles in MPE G-4 Hypervideo Presentation
    (The Eurographics Association, 2006) Bue, A. Lo; S. Battiato and G. Gallo and F. Stanco
    The definition of presentation layout, based on device and user features, can be useful to provide multidevices content adaptation capabilities for hypervideos presentations. We provide a possible approach of content adaptation through different devices using MPEG-4 as presentation framework. In particular, we focus on the use of adaptable interfaces in hypervideos presentations, separating layout information from media data. A possibility of adaptation comes from separation of media representation and audiovisual scene structure in MPEG-4. We describe an implementation of this approach through XMT-A language, defining two layout examples and denoting advantages and problems encountered.
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    Adaptive Frame Rate Up-conversion with Motion Extraction from 3D Space for 3D Graphic Pipelines
    (The Eurographics Association, 2006) Falchetto, M.; Barone, M.; Pau, D.; S. Battiato and G. Gallo and F. Stanco
    A novel 3D Graphic Pipeline for mobile handheld devices is introduced. It s able to achieve increased frame-rate at its output, high picture quality, improved temporal anti-aliasing, thanks to frame-rate upconversion algorithm based on primitive s motion extraction and efficient compensation. Classic rendering process doesn t exploit spatial and temporal coherence of the motion: each frame is rendered by using a lot of the pipeline resources inside geometry, rasteriser and fragment processing stages. Moreover each frame is computed independently from the temporal adjacent one with a brute force approach. Video based algorithms instead (e.g. MPEG type of processing), heavily exploit temporal, spatial and statistical coherency of the content being coded, relying on motion estimation to extract motion vectors from pixel domain during coding process and apply them during motion compensation decoding process. Previous works on 3D graphics were based on the use of impostors, sprite or coherent layers. Those approaches are too much complex and requires high computational power. Other ones based on frame averaging are too much simple: they achieve poor spatial and temporal quality and artifacts become clearly visible as the motion dynamic increases. Proposed approach instead exploits motion temporal coherency by extracting motion vectors from motions of visible primitives in screen space. Temporal coherence has been exploited between key frames using an adaptive motion compensated stage. This method is able to reconstruct the frames without introducing noticeable artifacts on final pictures. Results achieved are 10-15 dB better quality than simple temporal frame average and show a natural motion with no annoying artifacts like real video content shows.
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    Smart Ideas for Photomosaic Rendering
    (The Eurographics Association, 2006) Blasi, G. Di; Gallo, G.; Petralia, M.P.; S. Battiato and G. Gallo and F. Stanco
    Photomosaic is a technique which transforms an input image into a rectangular grid of thumbnail images preserving the overall appearance. The typical photomosaic algorithm searches from a large database of images one picture that approximates a block of pixels in the main image. Since the quality of the output depends on the size of the database, it turns out that the bottleneck in each photomosaic algorithm is the searching process. In this paper we present a technique to speed-up this critical phase using the Antipole Tree Data Structure. This improvement allows the use of larger databases without requiring much longer processing time, leading to very interesting results. Further we present some ideas to render an image in a "photomosaic style". These techniques are based on QuadTree and fractal images and allow the creation of very interesting "photomosaic effects".
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    A Message-Based Annotation System for Collaborative Design Review
    (The Eurographics Association, 2006) Witzel, M.; Conti, G.; Amicis, R. De; S. Battiato and G. Gallo and F. Stanco
    The paper illustrates a shared annotation mechanism developed within a collaborative virtual environment for design review. This represents one of the first prototypes being developed within the European Project IMPROVE and it has been designed to be used within two distinct industrial scenarios: automotive and architectural design. The key feature of the system is that its functionalities (modelling, rendering, tracking) are distributed across a network of computers performing specific tasks and that the communication among these takes place through a standardised data message exchange. This paper shows the effectiveness of this approach by focusing on the implementation of the distributed annotation feature.