Italian Chapter Conference 2007

Permanent URI for this collection

https://diglib.eg.org/handle/10.2312/911
Trento, Italy

BibTeX (Italian Chapter Conference 2007)
@inproceedings{
:10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/007-013,

booktitle = {
Eurographics Italian Chapter Conference},

editor = {
Raffaele De Amicis and Giuseppe Conti
},
title = {{
Spline-based Shape Modeling by 3D Sketching}},

author = {
Han, Li
 and 
Amicis, Raffaele De
 and 
Conti, Giuseppe
},
year = {
2007},

publisher = {
The Eurographics Association},


ISBN = {978-3905673-62-3},

DOI = {
/10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/007-013}

}
@inproceedings{
:10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/015-022,

booktitle = {
Eurographics Italian Chapter Conference},

editor = {
Raffaele De Amicis and Giuseppe Conti
},
title = {{
An Efficient Algorithm for Adaptive Segmentation and Tessellation with Pixel Precision}},

author = {
Martinelli, Alessandro
},
year = {
2007},

publisher = {
The Eurographics Association},


ISBN = {978-3905673-62-3},

DOI = {
/10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/015-022}

}
@inproceedings{
:10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/023-029,

booktitle = {
Eurographics Italian Chapter Conference},

editor = {
Raffaele De Amicis and Giuseppe Conti
},
title = {{
Rewriting Rules for the Dual Graph of a Stripified CLOD Mesh}},

author = {
Porcu, Massimiliano B.
 and 
Scateni, Riccardo
},
year = {
2007},

publisher = {
The Eurographics Association},


ISBN = {978-3905673-62-3},

DOI = {
/10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/023-029}

}
@inproceedings{
:10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/031-038,

booktitle = {
Eurographics Italian Chapter Conference},

editor = {
Raffaele De Amicis and Giuseppe Conti
},
title = {{
Explicit Adaptive Tessellation based on re-parametrization on Graphics Hardware}},

author = {
Martinelli, Alessandro
},
year = {
2007},

publisher = {
The Eurographics Association},


ISBN = {978-3905673-62-3},

DOI = {
/10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/031-038}

}
@inproceedings{
:10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/039-043,

booktitle = {
Eurographics Italian Chapter Conference},

editor = {
Raffaele De Amicis and Giuseppe Conti
},
title = {{
3D Objects Face Clustering using Unsupervised Mean Shift}},

author = {
Farenzena, M.
 and 
Cristani, M.
 and 
Castellani, U.
 and 
Fusiello, A.
},
year = {
2007},

publisher = {
The Eurographics Association},


ISBN = {978-3905673-62-3},

DOI = {
/10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/039-043}

}
@inproceedings{
:10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/059-064,

booktitle = {
Eurographics Italian Chapter Conference},

editor = {
Raffaele De Amicis and Giuseppe Conti
},
title = {{
Ramses: a Visual Steganographic System}},

author = {
Battiato, S.
 and 
Blasi, G. Di
 and 
Gallo, G.
 and 
Patti, S.
},
year = {
2007},

publisher = {
The Eurographics Association},


ISBN = {978-3905673-62-3},

DOI = {
/10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/059-064}

}
@inproceedings{
:10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/073-078,

booktitle = {
Eurographics Italian Chapter Conference},

editor = {
Raffaele De Amicis and Giuseppe Conti
},
title = {{
Realtime Wavelet Video Encoding with Generic Graphics Processing Unit}},

author = {
Stocklöw, Carsten
 and 
Noll, Stefan
},
year = {
2007},

publisher = {
The Eurographics Association},


ISBN = {978-3905673-62-3},

DOI = {
/10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/073-078}

}
@inproceedings{
:10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/045-049,

booktitle = {
Eurographics Italian Chapter Conference},

editor = {
Raffaele De Amicis and Giuseppe Conti
},
title = {{
Challenges for modern Scene-Graph Systems}},

author = {
Mueller-Wittig, Wolfgang
 and 
Voss, Gerrit
},
year = {
2007},

publisher = {
The Eurographics Association},


ISBN = {978-3905673-62-3},

DOI = {
/10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/045-049}

}
@inproceedings{
:10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/065-071,

booktitle = {
Eurographics Italian Chapter Conference},

editor = {
Raffaele De Amicis and Giuseppe Conti
},
title = {{
Rendering Order Optimization for SVGStat Improvement}},

author = {
Battiato, Sebastiano
 and 
Puglisi, Giovanni
},
year = {
2007},

publisher = {
The Eurographics Association},


ISBN = {978-3905673-62-3},

DOI = {
/10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/065-071}

}
@inproceedings{
:10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/051-058,

booktitle = {
Eurographics Italian Chapter Conference},

editor = {
Raffaele De Amicis and Giuseppe Conti
},
title = {{
Marker-less Real-time Camera Registration for Mixed Reality}},

author = {
Liverani, Alfredo
 and 
Grandi, Stefania
},
year = {
2007},

publisher = {
The Eurographics Association},


ISBN = {978-3905673-62-3},

DOI = {
/10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/051-058}

}
@inproceedings{
:10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/079-085,

booktitle = {
Eurographics Italian Chapter Conference},

editor = {
Raffaele De Amicis and Giuseppe Conti
},
title = {{
Preserving Information from Real Objects to Digital Shapes}},

author = {
Albertoni, Riccardo
 and 
Papaleo, Laura
 and 
Robbiano, Francesco
},
year = {
2007},

publisher = {
The Eurographics Association},


ISBN = {978-3905673-62-3},

DOI = {
/10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/079-085}

}
@inproceedings{
:10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/087-093,

booktitle = {
Eurographics Italian Chapter Conference},

editor = {
Raffaele De Amicis and Giuseppe Conti
},
title = {{
3D Scene Comparison using Topological Graphs}},

author = {
Paraboschi, L.
 and 
Biasotti, S.
 and 
Falcidieno, B.
},
year = {
2007},

publisher = {
The Eurographics Association},


ISBN = {978-3905673-62-3},

DOI = {
/10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/087-093}

}
@inproceedings{
:10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/103-106,

booktitle = {
Eurographics Italian Chapter Conference},

editor = {
Raffaele De Amicis and Giuseppe Conti
},
title = {{
Bringing the Semantics into Digital Shapes: the AIM@SHAPE Approach}},

author = {
Falcidieno, Bianca
},
year = {
2007},

publisher = {
The Eurographics Association},


ISBN = {978-3905673-62-3},

DOI = {
/10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/103-106}

}
@inproceedings{
:10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/095-101,

booktitle = {
Eurographics Italian Chapter Conference},

editor = {
Raffaele De Amicis and Giuseppe Conti
},
title = {{
Form Features in Non-manifold Shapes: A First Classification and Analysis}},

author = {
Crovetto, Chiara
 and 
Floriani, Leila De
 and 
Giannini, Franca
},
year = {
2007},

publisher = {
The Eurographics Association},


ISBN = {978-3905673-62-3},

DOI = {
/10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/095-101}

}
@inproceedings{
:10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/113-118,

booktitle = {
Eurographics Italian Chapter Conference},

editor = {
Raffaele De Amicis and Giuseppe Conti
},
title = {{
Flexible Multimodal Architecture for CAD Application}},

author = {
Dellisanti, M.
 and 
Fiorentino, M.
 and 
Monno, G.
 and 
Uva, A. E.
},
year = {
2007},

publisher = {
The Eurographics Association},


ISBN = {978-3905673-62-3},

DOI = {
/10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/113-118}

}
@inproceedings{
:10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/119-126,

booktitle = {
Eurographics Italian Chapter Conference},

editor = {
Raffaele De Amicis and Giuseppe Conti
},
title = {{
VR Studio: Solid Modelling in a Virtual Reality Environment}},

author = {
Cappello, F.
 and 
Ingrassia, T.
 and 
Romano, M.
},
year = {
2007},

publisher = {
The Eurographics Association},


ISBN = {978-3905673-62-3},

DOI = {
/10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/119-126}

}
@inproceedings{
:10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/107-112,

booktitle = {
Eurographics Italian Chapter Conference},

editor = {
Raffaele De Amicis and Giuseppe Conti
},
title = {{
Human Robot Interaction in Virtual Reality}},

author = {
Gironimo, G. Di
 and 
Marzano, A.
 and 
Tarallo, A.
},
year = {
2007},

publisher = {
The Eurographics Association},


ISBN = {978-3905673-62-3},

DOI = {
/10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/107-112}

}
@inproceedings{
:10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/135-138,

booktitle = {
Eurographics Italian Chapter Conference},

editor = {
Raffaele De Amicis and Giuseppe Conti
},
title = {{
Mobile Presence - a Computer Graphics Utopia?}},

author = {
Stork, Andre
 and 
Danch, Daniel
},
year = {
2007},

publisher = {
The Eurographics Association},


ISBN = {978-3905673-62-3},

DOI = {
/10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/135-138}

}
@inproceedings{
:10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/127-134,

booktitle = {
Eurographics Italian Chapter Conference},

editor = {
Raffaele De Amicis and Giuseppe Conti
},
title = {{
A Mixed Environment for Ergonomics Tests: Tuning of Stereo Viewing Parameters}},

author = {
Bordegoni, Monica
 and 
Caruso, Giandomenico
 and 
Ferrise, Francesco
 and 
Giraudo, Umberto
},
year = {
2007},

publisher = {
The Eurographics Association},


ISBN = {978-3905673-62-3},

DOI = {
/10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/127-134}

}
@inproceedings{
:10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/139-144,

booktitle = {
Eurographics Italian Chapter Conference},

editor = {
Raffaele De Amicis and Giuseppe Conti
},
title = {{
ImaginationTOOLS (TM)- A 3D Environment for Learning and Playing Music}},

author = {
Bilotta, E.
 and 
Pantano, P.
 and 
Bertacchini, F.
 and 
Gabriele, L.
 and 
Longo, G.
 and 
Mazzeo, V.
 and 
Rizzuti, C.
 and 
Talarico, A.
 and 
Tocci, G.
 and 
Vena, S.
},
year = {
2007},

publisher = {
The Eurographics Association},


ISBN = {978-3905673-62-3},

DOI = {
/10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/139-144}

}
@inproceedings{
:10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/145-150,

booktitle = {
Eurographics Italian Chapter Conference},

editor = {
Raffaele De Amicis and Giuseppe Conti
},
title = {{
A Practical Vision Based Approach to Unencumbered Direct Spatial Manipulation in Virtual Worlds}},

author = {
Bettio, Fabio
 and 
Giachetti, Andrea
 and 
Gobbetti, Enrico
 and 
Marton, Fabio
 and 
Pintore, Giovanni
},
year = {
2007},

publisher = {
The Eurographics Association},


ISBN = {978-3905673-62-3},

DOI = {
/10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/145-150}

}
@inproceedings{
:10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/151-153,

booktitle = {
Eurographics Italian Chapter Conference},

editor = {
Raffaele De Amicis and Giuseppe Conti
},
title = {{
"Beyond the desktop, Out of the Office..." Designing Interactive Graphics Applications for Mobile Devices}},

author = {
Chittaro, Luca
},
year = {
2007},

publisher = {
The Eurographics Association},


ISBN = {978-3905673-62-3},

DOI = {
/10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/151-153}

}
@inproceedings{
:10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/173-180,

booktitle = {
Eurographics Italian Chapter Conference},

editor = {
Raffaele De Amicis and Giuseppe Conti
},
title = {{
Collaborative Visualization of Sensor Data Through a Subscription based Architecture}},

author = {
Witzel, M.
 and 
Andreolli, M.
 and 
Conti, G.
 and 
Amicis, R. De
 and 
Araújo, B. De
 and 
Jota, R.
 and 
Jorge, J.
},
year = {
2007},

publisher = {
The Eurographics Association},


ISBN = {978-3905673-62-3},

DOI = {
/10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/173-180}

}
@inproceedings{
:10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/161-166,

booktitle = {
Eurographics Italian Chapter Conference},

editor = {
Raffaele De Amicis and Giuseppe Conti
},
title = {{
Medical Visualization with New Generation Spatial 3D Displays}},

author = {
Agus, Marco
 and 
Bettio, Fabio
 and 
Gobbetti, Enrico
 and 
Pintore, Giovanni
},
year = {
2007},

publisher = {
The Eurographics Association},


ISBN = {978-3905673-62-3},

DOI = {
/10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/161-166}

}
@inproceedings{
:10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/155-160,

booktitle = {
Eurographics Italian Chapter Conference},

editor = {
Raffaele De Amicis and Giuseppe Conti
},
title = {{
Techniques for Computer Assisted Surgery}},

author = {
Turini, G.
 and 
Pietroni, N.
 and 
Ganovelli, F.
 and 
Scopigno, R.
},
year = {
2007},

publisher = {
The Eurographics Association},


ISBN = {978-3905673-62-3},

DOI = {
/10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/155-160}

}
@inproceedings{
:10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/167-172,

booktitle = {
Eurographics Italian Chapter Conference},

editor = {
Raffaele De Amicis and Giuseppe Conti
},
title = {{
Methods for Spatial Data Quality of 3D City Models}},

author = {
Krämer, Michel
 and 
Haist, Jörg
 and 
Reitz, Thorsten
},
year = {
2007},

publisher = {
The Eurographics Association},


ISBN = {978-3905673-62-3},

DOI = {
/10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/167-172}

}
@inproceedings{
:10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/191-198,

booktitle = {
Eurographics Italian Chapter Conference},

editor = {
Raffaele De Amicis and Giuseppe Conti
},
title = {{
Modelling and Animation of Theatrical Greek Masks in an Authoring System}},

author = {
Bertacchini, P. A.
 and 
Bilotta, E.
 and 
Pantano, P.
 and 
Battiato, S.
 and 
Cronin, M.
 and 
Blasi, G. Di
 and 
Talarico, A.
 and 
Tavernise, A.
},
year = {
2007},

publisher = {
The Eurographics Association},


ISBN = {978-3905673-62-3},

DOI = {
/10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/191-198}

}
@inproceedings{
:10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/187-189,

booktitle = {
Eurographics Italian Chapter Conference},

editor = {
Raffaele De Amicis and Giuseppe Conti
},
title = {{
Daily Life in the Middle Ages - Parma in the Cathedral Age}},

author = {
Guidazzoli, Antonella
 and 
Ponti, Francesca Delli
},
year = {
2007},

publisher = {
The Eurographics Association},


ISBN = {978-3905673-62-3},

DOI = {
/10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/187-189}

}
@inproceedings{
:10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/181-185,

booktitle = {
Eurographics Italian Chapter Conference},

editor = {
Raffaele De Amicis and Giuseppe Conti
},
title = {{
Benefits of Innovative Technologies for "Territorial Communication": the Case of Study "Virtual Museum Net of Magna Graecia"}},

author = {
Bertacchini, P. A.
 and 
Dell'Accio, A.
 and 
Mallamaci, L.
 and 
Pantano, E.
},
year = {
2007},

publisher = {
The Eurographics Association},


ISBN = {978-3905673-62-3},

DOI = {
/10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/181-185}

}
@inproceedings{
:10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/203-208,

booktitle = {
Eurographics Italian Chapter Conference},

editor = {
Raffaele De Amicis and Giuseppe Conti
},
title = {{
Real Positioning in Virtual Environments Using Game Engines}},

author = {
Chiara, Rosario De
 and 
Santo, Valentina Di
 and 
Erra, Ugo
 and 
Scarano, Vittorio
},
year = {
2007},

publisher = {
The Eurographics Association},


ISBN = {978-3905673-62-3},

DOI = {
/10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/203-208}

}
@inproceedings{
:10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/209-212,

booktitle = {
Eurographics Italian Chapter Conference},

editor = {
Raffaele De Amicis and Giuseppe Conti
},
title = {{
Patterns of Creativity in Design}},

author = {
Bilotta, E.
 and 
Pantano, P.
},
year = {
2007},

publisher = {
The Eurographics Association},


ISBN = {978-3905673-62-3},

DOI = {
/10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/209-212}

}
@inproceedings{
:10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/231-234,

booktitle = {
Eurographics Italian Chapter Conference},

editor = {
Raffaele De Amicis and Giuseppe Conti
},
title = {{
Product Design, Reverse Engineering, Rapid Prototyping - a Case Study in Cutlery Production}},

author = {
Magrassi, Grazia
 and 
Bordegoni, Monica
},
year = {
2007},

publisher = {
The Eurographics Association},


ISBN = {978-3905673-62-3},

DOI = {
/10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/231-234}

}
@inproceedings{
:10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/213-216,

booktitle = {
Eurographics Italian Chapter Conference},

editor = {
Raffaele De Amicis and Giuseppe Conti
},
title = {{
Multiple Techniques Approach to the 3D Virtual Reconstruction of Cultural Heritage}},

author = {
Gonzo, L.
 and 
Voltolini, F.
 and 
Girardi, S.
 and 
Rizzi, A.
 and 
Remondino, F.
 and 
El-Hakim, S. F.
},
year = {
2007},

publisher = {
The Eurographics Association},


ISBN = {978-3905673-62-3},

DOI = {
/10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/213-216}

}
@inproceedings{
:10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/217-224,

booktitle = {
Eurographics Italian Chapter Conference},

editor = {
Raffaele De Amicis and Giuseppe Conti
},
title = {{
Use of a 3D Graphical User Interface in Microelectronics Learning and Simulation of an Industrial Application}},

author = {
Bilotta, E.
 and 
Pantano, P.
 and 
Rinaudo, S.
 and 
Servidio, R.
 and 
Talarico, V.
},
year = {
2007},

publisher = {
The Eurographics Association},


ISBN = {978-3905673-62-3},

DOI = {
/10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/217-224}

}
@inproceedings{
:10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/199-201,

booktitle = {
Eurographics Italian Chapter Conference},

editor = {
Raffaele De Amicis and Giuseppe Conti
},
title = {{
The Dance of the Air: a Case Study in Interactive Digital Art}},

author = {
Cuoghi, E.
 and 
Gherardi, R.
 and 
Toldo, R.
},
year = {
2007},

publisher = {
The Eurographics Association},


ISBN = {978-3905673-62-3},

DOI = {
/10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/199-201}

}
@inproceedings{
:10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/225-229,

booktitle = {
Eurographics Italian Chapter Conference},

editor = {
Raffaele De Amicis and Giuseppe Conti
},
title = {{
Dynamic Rail Inspection by Vision System}},

author = {
Cerniglia, D.
 and 
Nigrelli, V.
 and 
Prior, F.
},
year = {
2007},

publisher = {
The Eurographics Association},


ISBN = {978-3905673-62-3},

DOI = {
/10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/225-229}

}
@inproceedings{
:10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/235-242,

booktitle = {
Eurographics Italian Chapter Conference},

editor = {
Raffaele De Amicis and Giuseppe Conti
},
title = {{
Developing a Virtual Training System in Aeronautical Industry}},

author = {
Gironimo, G. Di
 and 
Guida, M.
},
year = {
2007},

publisher = {
The Eurographics Association},


ISBN = {978-3905673-62-3},

DOI = {
/10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2007/235-242}

}

Browse

Recent Submissions

Now showing 1 - 37 of 37
  • No Thumbnail Available
    Item
    Spline-based Shape Modeling by 3D Sketching
    (The Eurographics Association, 2007) Han, Li; Amicis, Raffaele De; Conti, Giuseppe; Raffaele De Amicis and Giuseppe Conti
    The increasing domination of spline-based graphic objects in CAD/CAS has driven a great attention to methods focusing on natural and intelligent free-form shape manipulation. We present a novel sketch-based system for the interactive modeling of a variety of free-form 3D objects using just simple spline sketches. Our technique addresses the issue of the traditional illustrations for depicting 3D subjects, ranging from geometric modeling to progressive refinement. The robust surface interpreters we proposed support NURBS surface construction respecting the designers' different drawing styles, and a so called spline-driven deformation technique provides designer predictable surface edition. In our system the spline strokes are freely sketched in 3D space and they are controlled by 3D dragger, which will produce a sequence of dynamic deformations to facilitate the user to achieve the desired models. The method has been tested with various types of sketches, which are rendered in a 3D environment.
  • No Thumbnail Available
    Item
    An Efficient Algorithm for Adaptive Segmentation and Tessellation with Pixel Precision
    (The Eurographics Association, 2007) Martinelli, Alessandro; Raffaele De Amicis and Giuseppe Conti
    We propose a new algorithm to get a representation of a curved surface with the precision of the image pixel. This technique uses some results from Scan-line algorithms, but it considers also the new functionalities from graphics hardware and takes advantages from it. We explain the general method, with principles common to every kind of surface: then we illustrate how these principles can be applied to quadratic and cubic bezier triangles, showing formulas and some algorithm details.
  • No Thumbnail Available
    Item
    Rewriting Rules for the Dual Graph of a Stripified CLOD Mesh
    (The Eurographics Association, 2007) Porcu, Massimiliano B.; Scateni, Riccardo; Raffaele De Amicis and Giuseppe Conti
    A triangular mesh is the piecewise linear approximation of a sampled or analytical surface, when each patch is a triangle. The connectivity of the mesh can be easily represented using its dual graph. Each node of such a graph has at most three incident edges; if the surface is homeomorphic to a sphere, each node has exactly three incident edges. Several triangular meshes, representing the same surface, with an increasing number of triangles are a representation of the surface at different levels of detail (LOD). When the number of triangles from one LOD to another varies continuously we call such a structure a continuous level of detail (CLOD) approximation of the surface. Given a CLOD data structure we can extract, at each level, the mesh representing the surface and derive its dual graph. If we group the triangles forming each mesh in strips, to accelerate their rendering, we should use two colors for the dual graph's edges to distinguish between the edges linking nodes belonging to the same strip or not. The main goal of this paper is to present a set of rules to recolor the dual graph of the mesh when passing from one LOD to the next and back. The operations used to change the mesh are a Vertex Split (VS) when the resolution increases, and an Edge Collapse (EC) when the resolution decreases. We can, then, use a local topological analysis to derive the rules allowing to recolor the graph, and to show that, under certain conditions, the recoloring is optimal. This allows to keep effectively an optimal triangle strip structure over the mesh, while changing its resolution.
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    Explicit Adaptive Tessellation based on re-parametrization on Graphics Hardware
    (The Eurographics Association, 2007) Martinelli, Alessandro; Raffaele De Amicis and Giuseppe Conti
    We propose to use an explicit function for adaptive tessellation of parametric curves and surfaces. This function behaves as a new parametrization from the surface domain (or curve domain) to the domain itself; it is build using information about derivatives and curvature: a fixed tessellation may be re-arranged in an adaptive tessellation, which takes care of those parts of the curve or surface which need to be tessellated more and those which may use a poorer tessellation. We show how to produce and how to use the kernel function with four example: a simple cubic curve, a spline curve, a cubic bezièr triangle and a cubic quadrilateral patch. For every example, we compare the fixed tessellation with the adaptive one: the number of vertexes used is always the same, but the points are re-arranged in a better way. At the end we show how to use commonly known forward differencing methods to evaluate both the explicit parametrization and the curve or surface; we also show how simply this method may be implemented on common graphics cards.
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    3D Objects Face Clustering using Unsupervised Mean Shift
    (The Eurographics Association, 2007) Farenzena, M.; Cristani, M.; Castellani, U.; Fusiello, A.; Raffaele De Amicis and Giuseppe Conti
    In this paper, a novel approach to face clustering is proposed. The aim is the completely unsupervised extraction of planes in a polygonal a mesh, obtained from a 3D reconstruction process. In this context, 3D coordinates points are inevitably affected by error, therefore resiliency is a primal concern in the analysis. The method is based on the Mean Shift clustering paradigm, devoted to separating modes of a multimodal non-parametric density, by using a kernel-based technique. A critical parameter, the kernel bandwidth size, is here automatically detected by following a well-accepted partition stability criterion. Experimental and comparative results on synthetic and real data validate the approach.
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    Ramses: a Visual Steganographic System
    (The Eurographics Association, 2007) Battiato, S.; Blasi, G. Di; Gallo, G.; Patti, S.; Raffaele De Amicis and Giuseppe Conti
    Steganography is the art of "secret communication". Its goal is to transmit a message (information) hidden inside another visible message. The typical visible message used in many steganographic systems is a digital image and the embedded message is usually hidden by working in the Fourier domain. In this paper we present Ramses, a novel approach to the steganography based on the Puzzle Image Mosaic (PIM) technique ( [DGP05]) which uses the metaphor of the hieroglyphicwriting to hide the message in the image. Themessage is first coded by a sequence of small irregular images and then merged inside another image together with many other small images.We prove that the Kerckhoff's principle required by a steganographic technique is satisfied and experimental results show how it is very difficult to detect the hidden message.
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    Realtime Wavelet Video Encoding with Generic Graphics Processing Unit
    (The Eurographics Association, 2007) Stocklöw, Carsten; Noll, Stefan; Raffaele De Amicis and Giuseppe Conti
    Wavelet video encoding with multi-resolution analysis is the base for a layered coding scheme. From one video source streams of different resolutions can be generated in one coding process. To reduce computing time the graphics processing unit (GPU) of a PC system is used for tasks of video compression. Color space conversion and wavelet transformation with just one single rendering pass for horizontal and for vertical decomposition were done be the GPU. Together with the CPU the GPU increases the computed frames per second and possible resolutions for live videos. Live broadcasting and interactive systems with streaming video like video conferencing are applications which take advantage from the proposed concept. This is especially interesting for live video encoding up to the high definition TV (HDTV) formats 720p and better.
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    Challenges for modern Scene-Graph Systems
    (The Eurographics Association, 2007) Mueller-Wittig, Wolfgang; Voss, Gerrit; Raffaele De Amicis and Giuseppe Conti
    Current scenegraph systems, especially systems used to build general purpose virtual reality systems, are trailing game engines and similar specialized systems in terms of the adaption of new renderingmethods like the different real-time shadow algorithms. This paper analysis the fundamental OpenGL state abstraction layers present in current scenegraph systems with respect to their influence on the adaption of new and complex rendering algorithms.
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    Rendering Order Optimization for SVGStat Improvement
    (The Eurographics Association, 2007) Battiato, Sebastiano; Puglisi, Giovanni; Raffaele De Amicis and Giuseppe Conti
    Vector representation of digital images offers a number of advantages over the more common raster representation, such as scalability and resolution independence. Many efforts have been made to deploy scalable raster standards for photographic imagery addressed to portable applications. However, they lack the flessibility and simplicity of vector representation. Vector graphics is a new and little explored alternative to the more common representation. In this paper we present our raster to vector technique, called SVGStat, improved with a new boundaries simplification algorithm.
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    Marker-less Real-time Camera Registration for Mixed Reality
    (The Eurographics Association, 2007) Liverani, Alfredo; Grandi, Stefania; Raffaele De Amicis and Giuseppe Conti
    A real-time and robust algorithm for 3D camera registration in a Mixed Reality (MR) environment is described in this paper. The most used technique for camera pose (position and orientation with respect to a fixed or moving object) is based on fiducial marker tracking. This method guarantees good results in real-time with a single camera, but needs several high contrast printed markers on external world in order to make possible the calculation of camera parameters and positioning. Thus real 3D geometric data are grabbed only through already known markers. The aim of this research is a real-time monocular camera tracking and registration through automatic image features extraction from video streaming. The first implementation of the method, several examples and confrontation with non interactive algorithm for SFM (Structure From Motion) have demonstrated that this meets the real-time response and sufficient precision needed by a Mixed Reality environment.
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    Preserving Information from Real Objects to Digital Shapes
    (The Eurographics Association, 2007) Albertoni, Riccardo; Papaleo, Laura; Robbiano, Francesco; Raffaele De Amicis and Giuseppe Conti
    Nowadays, the success of the scientific enterprise largely depends on the ability of sharing resources among the scientific community. This problem is particularly relevant in the field of Computer Graphics and Vision. During the last years specific domains ontologies are emerging in support of different contexts, aiming at facilitating automated resource-sharing among information systems in specific fields. A fast evolution of Computer Graphics and Vision is now conditioned by how research teams will be able to intercommunicate. The shared resources should preserve as much meaningful information as possible, in order to allow and improve collaborative research and complete understanding of complex tasks. A critical phase in Computer Graphics and Vision is the Acquisition Phase, which includes different conditions and properties related to the object to be scanned, to the surrounding environment or even to the knowledge of the scanning experts. The novelty of our work is the tentative to integrate Knowledge Management approaches to Computer Graphics and Vision and, in particular, we aim at preserving information when passing from the real world (Real Objects) to the digital one (Digital Shapes). This is a fundamental step for moving knowledge from humans to machines.
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    3D Scene Comparison using Topological Graphs
    (The Eurographics Association, 2007) Paraboschi, L.; Biasotti, S.; Falcidieno, B.; Raffaele De Amicis and Giuseppe Conti
    New technologies for shape acquisition and rendering of digital shapes have simplified the process of creating virtual scenes; nonetheless, shape annotation, recognition and manipulation of both the complete virtual scenes and even of subparts of them are still open problems. In this paper we deal with the problem of comparing two (or more) object sets, where each model is represented by an attributed graph. We will define a new distance to estimate the possible similarities among the sets of graphs and will validate our work using the shape graph [BGSF06].
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    Bringing the Semantics into Digital Shapes: the AIM@SHAPE Approach
    (The Eurographics Association, 2007) Falcidieno, Bianca; Raffaele De Amicis and Giuseppe Conti
    This presentation describes the main objectives and achievements of the European Network of Excellence AIM@SHAPE. This NoE is aimed to advance research in the direction of semantic-based shape representations and tools able to acquire, build, transmit and process shapes with their associated knowledge. Acting on a multi-disciplinary research field, AIM@SHAPE deeply integrates geometry processing, computer graphics and vision with knowledge technologies. The core of the integration resides in the homogenisation of the approach to modelling shapes and their associated semantics using knowledge formalisation mechanisms: metadata and ontology. A main objective is also to develop an innovative e-science platform for modelling, processing and sharing digital shapes, called the Digital Shape Workbench (DSW). Through the definition of general and specific shape ontologies, the DSW is a framework able to store shapes, tools, and publications along with the knowledge related to them.
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    Form Features in Non-manifold Shapes: A First Classification and Analysis
    (The Eurographics Association, 2007) Crovetto, Chiara; Floriani, Leila De; Giannini, Franca; Raffaele De Amicis and Giuseppe Conti
    During the industrial design process, a product model undergoes several analyses. One of the most common ones is the finite element analysis. This kind of analysis needs a simplified model, which can include idealised parts, and thus it is usually non-manifold and non-regular. During the idealisation process, the semantic information attached to the CAD model, such as features or surface types, or information used for model simplification, e.g. assumptions on the behavior type, is usually lost, thus making more difficult re-using, or, at least taking advantage, of performed simulations and models. This would be made easier if a meaningful interpretation of the object subparts is available. To this aim, in this paper, we provide a taxonomy of form features in non-manifold shapes and we describe an approach for their identification based on a decomposition of a non-manifold shapes into uniformly dimensional components proposed in [DHH06]. The process presented is the first step towards the identification of form features, since it analyzes those features containing non-manifold singularities.
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    Flexible Multimodal Architecture for CAD Application
    (The Eurographics Association, 2007) Dellisanti, M.; Fiorentino, M.; Monno, G.; Uva, A. E.; Raffaele De Amicis and Giuseppe Conti
    Multimodal interfaces are proved to increase the input\output bandwidth for a more efficient interaction in 3D activities. This work presents a novel framework designed to simplify the configuration procedures and to provide a high level of flexibility in multimodal interfaces. We propose an innovative system architecture to decouple input and output configuration from the application level and a multimodal engine designed to manage and synchronize the different inputs. The flexibility of the system is ensured by the use of a hierarchical XML-based configuration structure. This framework can be applied to test the advantage of multimodal interfaces in VRAD applications and provides tools to explore the synergy of different input\output techniques
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    VR Studio: Solid Modelling in a Virtual Reality Environment
    (The Eurographics Association, 2007) Cappello, F.; Ingrassia, T.; Romano, M.; Raffaele De Amicis and Giuseppe Conti
    Today one of the most important industrial needs is to improve the design process, making it faster and more robust; of course such a requirement can be obtained by using virtual reality. In the field of mechanical design, in fact, there is a great demand for more intuitive and natural modelling systems to speed up the modelling process. All that can be reached by stereocopic visualization tecnology and 3D input systems. In this paper we present a software for 3D solid modelling in a virtual reality system. The CAD models, carried out by this software, can be studied in their natural scale thanks to a large screen display. Moreover the user is free to move his hands to sketch the models thanks to a 3D wireless input device.
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    Human Robot Interaction in Virtual Reality
    (The Eurographics Association, 2007) Gironimo, G. Di; Marzano, A.; Tarallo, A.; Raffaele De Amicis and Giuseppe Conti
    In this paper, we describe a framework which helps designers visualize and verify the results of robotic work cell simulation in a Virtual Environment (VE). The system aims at significantly reducing production costs and error sources during manufacturing processes. The means to achieve these goals are the development of a prototypical VE for the support of robots planning tasks, reuse of animation events, and the implementation of customization tools for animation elements and their behavior. By using advanced Virtual Reality (VR) techniques, the system is also able to direct the focus of the observer to interesting events, objects and time-frames during robotic simulations in order to highlight the Human Robot Interaction within the manufacturing systems.
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    Mobile Presence - a Computer Graphics Utopia?
    (The Eurographics Association, 2007) Stork, Andre; Danch, Daniel; Raffaele De Amicis and Giuseppe Conti
    In this paper we set out a future scenario of mobile presence. We will define our understanding of the term mobile presence. We will derive the requirements imposed by mobile presence with respect to computer graphics and computer graphics research. Discussing the state of the art in various fields, we like to identify and stimulate approaches and areas of research relevant to mobile presence now and in the future.
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    A Mixed Environment for Ergonomics Tests: Tuning of Stereo Viewing Parameters
    (The Eurographics Association, 2007) Bordegoni, Monica; Caruso, Giandomenico; Ferrise, Francesco; Giraudo, Umberto; Raffaele De Amicis and Giuseppe Conti
    Virtual Reality and related technologies are becoming a common practice in the design industry in general and more specifically in the automotive field. By the joined use of virtual prototyping methodologies it is possible to achieve the reduction of the time-to-market, as well as the costs deriving from the creation of physical prototypes. Ergonomics tests conducted in Virtual Reality environments can be successfully used to influence the design of products. We have set up a mixed reality environment that allows us to simulate and test postural aspects as well as various levels and modalities of users' interaction. In order to achieve a performing interaction, correct registration and visualization parameters must be carefully set for preventing possible interaction errors, such as pointing with precision to the assigned target. The paper presents a methodology for tuning stereoscopic properties of the mixed reality environments used for ergonomic tests of a car interior in order to achieve correct visualization and positioning parameters. The environment includes a virtual human controlled by an optical motion tracking system, physical objects onto which the graphic virtual environment is superimposed, and a rotatory haptic device for controlling the car on-board infotainment. interface.
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    ImaginationTOOLS (TM)- A 3D Environment for Learning and Playing Music
    (The Eurographics Association, 2007) Bilotta, E.; Pantano, P.; Bertacchini, F.; Gabriele, L.; Longo, G.; Mazzeo, V.; Rizzuti, C.; Talarico, A.; Tocci, G.; Vena, S.; Raffaele De Amicis and Giuseppe Conti
    In this paper, we present ImaginationTOOLS, a software which uses mathematical models to generate, analyse and synthesize sound and music. User learns in an imaginary 3D-city basic concepts on mathematical models and music by interacting with pedagogical agents; composes in a laboratory room using a manipulatory agent-like interface; listens to music in an immersive room and creates interactive music with ad-hoc designed instruments and performs and shares music on the net. It represents a real advancement on the existing similar scientificallyoriented products available on the market and it is considered a fusion of different music and multimedia technologies, with a strong developmental trend into physical interaction design. It is the first software using 3D interaction in a 3D environment to produce sound and music, extending the potential of musicians by experimenting in the psycho-acoustical domain of sound and overcoming the problems of musical education, with simple interface.
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    A Practical Vision Based Approach to Unencumbered Direct Spatial Manipulation in Virtual Worlds
    (The Eurographics Association, 2007) Bettio, Fabio; Giachetti, Andrea; Gobbetti, Enrico; Marton, Fabio; Pintore, Giovanni; Raffaele De Amicis and Giuseppe Conti
    We present a practical approach for developing interactive environments that allows humans to interact with large complex 3D models without them having to manually operate input devices. The system provides support for scene manipulation based on hand tracking and gesture recognition and for direct 3D interaction with the 3D models in the display space if a suitably registered 3D display is used. Being based on markerless tracking of a user's two hands, the system does not require users to wear any input or output devices. 6DOF input is provided by using both hands simultaneously,making the tracker more robust since only tracking of position information is required. The effectiveness of the method is demonstrated with a simple application for model manipulation on a large stereo display, in which rendering constraints are met by employing state-of-the-art multiresolution techniques.
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    "Beyond the desktop, Out of the Office..." Designing Interactive Graphics Applications for Mobile Devices
    (The Eurographics Association, 2007) Chittaro, Luca; Raffaele De Amicis and Giuseppe Conti
    The recent availability of increasingly powerful PDAs and mobile phones is making it possible to develop new applications based on interactive (2D as well as 3D) graphics. However, limitations of mobile devices and the peculiar needs of users on-the-go require a careful design of applications that are specifically thought for mobile devices and users [Chi06]. Mobile graphics applications become even more innovative and provide functionalities that were unavailable on desktop systems when they are integrated with various sensors (e.g., GPS, accelerometers, heart rate monitors, pulseoximeters, ...) that allow one to adapt the behavior of the application according to position in space (location-awareness) and other parameters (context-awareness). In this way, the mobile device becomes able to choose what to draw and how to draw it on the display based on what is happening to the user as well as the physical world that surrounds her. Moreover, the data recorded by mobile sensors about the behavior of users on the move lends itself to the design of visualizations that can be important in domains such as health care, urban planning, geomarketing, emergency management, and others. This invited talk will first discuss why and how mobile graphics applications require to be approached differently from traditional ones. Then, it will demonstrate some new mobile applications that have been developed in domains as diverse as tourism, health and fitness, navigation, and architectural visualization. Finally, it will deal with the visualization of mobile users' behaviors by showing two different tools we have recently proposed [CRI06, NC07].
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    Collaborative Visualization of Sensor Data Through a Subscription based Architecture
    (The Eurographics Association, 2007) Witzel, M.; Andreolli, M.; Conti, G.; Amicis, R. De; Araújo, B. De; Jota, R.; Jorge, J.; Raffaele De Amicis and Giuseppe Conti
    In this paper we propose a collaborative prototype for the integration of Geographical Information System (GIS) sensor data into a distributed architecture for Virtual Reality. Sensor data of various origin and classified domains are provided using a topic subscription metaphor. A graphical editor, which allows creation/ import/export/manipulation of sensor data, serves as a real-time administrative interface to control the provision of topics/sensorial data and, at the same time, it is used as an interface to common GIS applications. A client application, responsible for the rendering, decides according to the context which data (timevarying, static) is relevant for the actual examination. Additionally, terrain cultures like forests, buildings, streets along with their geometrical and semantical attributes are provided by using queries to a Web Feature Service/PostGIS Database and translated to a 3D representation. These queries are broadcasted to all clients in the framework to assure at all times synchronicity of the examination data. Finally Session Management is enabled by storing the messages in a relational database to achieve persistency and recalling of the analysis process.
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    Medical Visualization with New Generation Spatial 3D Displays
    (The Eurographics Association, 2007) Agus, Marco; Bettio, Fabio; Gobbetti, Enrico; Pintore, Giovanni; Raffaele De Amicis and Giuseppe Conti
    In this paper the capabilities of a modern spatial 3D display are exploited for medical visualization tasks. The systemgives multiple viewers the illusion of seeing virtual objects floating at fixed physical locations. The usage of this kind of display in conjunction with 3D visualization techniques helps disambiguating complex images, so it is proven to be a real advantage for immediate understanding and visualization of medical data.We demonstrate this by reporting on some preliminary test cases of direct volume rendering techniques (Maximum Intensity Projection and X Ray simulation), as well as an example of a collaborative medical diagnostic application for analysis of Abdominal Aortic Aneurysms.
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    Techniques for Computer Assisted Surgery
    (The Eurographics Association, 2007) Turini, G.; Pietroni, N.; Ganovelli, F.; Scopigno, R.; Raffaele De Amicis and Giuseppe Conti
    In the recent decades robotic and computer science have been gaining more and more relevance in all aspects of our lives. In surgery, for example, they gave birth to procedures that would be impossible to perform otherwise (e.g. tele-surgery, nano-surgery). On this regard, these applied sciences already play an important role in assisting the surgeon both in the operative room and as a support in the education of young surgeons, but much work has still to be done. This paper presents some research and applicative results on Computer Assisted Surgery achieved in the framework of Endocas, a newly founded Center of Excellence in Pisa: a method for segmentation of anatomic parts from 3D dataset able to recover shapes from noisy 3D dataset; a technique for simulating bone drilling using a adaptive decomposition of tetrahedral meshes; a new open source library to support the implementation of techniques for simulating deformable objects.
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    Methods for Spatial Data Quality of 3D City Models
    (The Eurographics Association, 2007) Krämer, Michel; Haist, Jörg; Reitz, Thorsten; Raffaele De Amicis and Giuseppe Conti
    3D city models are nowadays used in very different applications. Due to this, the commercial exchange and, thus, the demand for high quality data becomes more and more important. We describe a quality model that defines common parameters used for spatial quality measurement, especially when dealing with 3D city models. Therefore, we explore different representations of city models: the reality, the user's idea and the digital data set. A welldefined mathematical formalism which addresses the different quality parameters is presented. This formalism also helps to create algorithms for measurement and improvement of spatial data quality. The aim is to be able to define uniformed criteria which can be easily transformed into software. The implemented prototype serves as base for the evaluation in which we provide examples based on actual data sets using typical quality requirements.
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    Modelling and Animation of Theatrical Greek Masks in an Authoring System
    (The Eurographics Association, 2007) Bertacchini, P. A.; Bilotta, E.; Pantano, P.; Battiato, S.; Cronin, M.; Blasi, G. Di; Talarico, A.; Tavernise, A.; Raffaele De Amicis and Giuseppe Conti
    This paper describes an authoring system for modelling Greek virtual masks that express emotions for synchronising their facial movements with pre-recorded speech files, and for creating theatrical performances. The system is related to parametric modelling and includes three interfaces: Editor, Recorder and Virtual Theatre. In the Editor interface it is possible to create several different 3D masks from a unique mask basic model. In the Recorder it is possible to import the models created in the Editor and select eight expressions (neutral, anger, surprise, sadness, fear, joy, disgust, attention), as well as to create and save little alterations in these expressions, and to synchronise the facial movements with speech on the time-line of the system. In the Virtual Theatre the animated Greek masks can be imported and can perform.
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    Daily Life in the Middle Ages - Parma in the Cathedral Age
    (The Eurographics Association, 2007) Guidazzoli, Antonella; Ponti, Francesca Delli; Raffaele De Amicis and Giuseppe Conti
    This experience is the result of a close interaction between computer science and historical studies. Technological knowledge and new tools for virtual reconstruction are not sufficient for Cultural Heritage philological works, but a close collaboration with historical experts is very important since the knowledge of both sciences have to work together in order for people to understand past civilizations. The aim of this exhibition is to improve the perception of events in the Middle Ages.
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    Benefits of Innovative Technologies for "Territorial Communication": the Case of Study "Virtual Museum Net of Magna Graecia"
    (The Eurographics Association, 2007) Bertacchini, P. A.; Dell'Accio, A.; Mallamaci, L.; Pantano, E.; Raffaele De Amicis and Giuseppe Conti
    Territorial communication aims at giving visibility and recognizability to a particular territory by emphasizing its distinctive aspects. It does not only supply information, but it has also a persuasive function, exciting interest and curiosity in the message receivers. In this vision, the use of innovative communication channels, such as Webbased Geographical Information Systems, as well as multimedia technologies and three-dimensional graphics, could be very effective. In this paper we introduce a case of study, the "Virtual Museum Net of Magna Graecia", a system in which technologies offer original procedures for the fruition of Calabrian Cultural Heritage.
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    Real Positioning in Virtual Environments Using Game Engines
    (The Eurographics Association, 2007) Chiara, Rosario De; Santo, Valentina Di; Erra, Ugo; Scarano, Vittorio; Raffaele De Amicis and Giuseppe Conti
    Immersive virtual environments offer a natural setting for educational and instructive experiences for users, and game engine technology offers an interesting, cost-effective and efficient solution for building them. In this paper we describe an ongoing project whose goal is to provide a virtual environment where the real location of the user is used to position the user's avatar into the virtual environment.
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    Patterns of Creativity in Design
    (The Eurographics Association, 2007) Bilotta, E.; Pantano, P.; Raffaele De Amicis and Giuseppe Conti
    One of the most remarkable features of the human mind is its creativity. During the course of this talk we shall be presenting some examples of the creative use of scientific models such as Chua's attractors and Cellular Automata in design. Our aim is to offer an enlightening glimpse into the relationship between scientific research into dynamical systems and the translation of these results into other media. As you all know, scientific research methods involve many kinds of cognitive processes such as, for example, categorization, reasoning, problem solving, analogy formation, which usually take place when representations are shared across representational media, as happens in the processes of data processing and transformation in order to create published scientific papers ( [HUT95], [LAT86]). Others are, for their part, widely distributed processes which involve the spreading of ideas across scientific communities. Yet there is a class of cognitive processes that occur in the interaction between scientists and with material representations, which is really action embodied in cognition, that is, pure creativity. There are two different methods by which people engage in the search for creativity, and each of these is associated with a different pattern of discovery. There are Experimental creators who work by trial and error, and arrive at their most important contributions in a gradual fashion. Conceptual creators, on the other hand, make sudden breakthroughs by formulating new ideas, and by this means they impose new ways of thinking and a new vision of the world. Today, the principal environment in which this form of creativity is represented is the computer ( [GER96], [BC01]), a new tool of and for the imagination that can shape our feelings and thoughts, and us the opportunity to communicate them to others. Computer based tools can be used to enhance the expressive potentials of our creativity, making it possible for everyone to express themselves.
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    Product Design, Reverse Engineering, Rapid Prototyping - a Case Study in Cutlery Production
    (The Eurographics Association, 2007) Magrassi, Grazia; Bordegoni, Monica; Raffaele De Amicis and Giuseppe Conti
    Reverse Engineering and Rapid Prototyping are consolidated practices in the industrial product design process. In any case, best practices should be set up according to the type of product and of objectives. This paper presents the results of a product re-engineering application in the field of high quality stainless steel cutlery. This activity included a re-modeling of a basis-shape that reproduces at best the original shape of a cutlery set designed in the Thirties for Alessi, which is still considered to be very fashionable. The shape of the manufactured physical pieces of cutlery has changed in time in respect to the original design, mainly because of some problems related to their manufacturing, which has been transferred from the central plant to other branches. We have obtained the digital model of the pieces of cutlery on the basis of the analysis of the available original 2D drawings, and of the laser scanning and subsequent re-engineering design of the available manufactured objects. Particularly complex activity was the removal of the shapes deviations due to the different forming techniques used in the various production factories. At the end of the reconstruction activity, physical prototypes of the new models were produced by means of a sintering process in order to evaluate and compare them to the original ones.
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    Multiple Techniques Approach to the 3D Virtual Reconstruction of Cultural Heritage
    (The Eurographics Association, 2007) Gonzo, L.; Voltolini, F.; Girardi, S.; Rizzi, A.; Remondino, F.; El-Hakim, S. F.; Raffaele De Amicis and Giuseppe Conti
    According to an UNESCO survey, Italy accounts for more than half of the Cultural Heritage of the entire world. Italy's Cultural Heritage therefore represents an enormous wealth not only for the country itself but also for the entire world and this asset should be preserved and documented for future generations and possibly used as source of revenues. Within the relevant methods of the Information Technology which can be applied to Cultural Heritage, that of accurate and realistic 3D "shape capture" of art works has been challenging the scientific community since a long time because an extremely high degree of realism is required. Thereby the virtual reconstruction of cultural heritage sites is becoming a significant field of application in the 3D modeling area. This paper proposes an integrated approach based upon a seamless combination of different 3D measurement techniques for the virtual reconstruction of complex architectures. Depending on the required spatial resolutions, different techniques can be used and at the end all the acquired data have to be integrated into a single 3D model. As example the model of a castle located in Trentino (Italy) was done using surveying, 3D laser scanner, close-range and aerial photogrammetry.
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    Use of a 3D Graphical User Interface in Microelectronics Learning and Simulation of an Industrial Application
    (The Eurographics Association, 2007) Bilotta, E.; Pantano, P.; Rinaudo, S.; Servidio, R.; Talarico, V.; Raffaele De Amicis and Giuseppe Conti
    The COMSON project (COupled Multiscale Simulation and Optimization in Nanoelectronics) is a Marie Curie Research Training Network (RTN) supported by the European Commission within the 6th Framework Research Programme of the EU. One of the outcomes of the COMSON project is the e-learning system linked to the Demonstrator Platform (DP). This framework is intended for researches in the Microelectronics, Physics and Applied Mathematics fields. It is also intended for industries and expert technical personnel. The main aim of the project is to provide an effective training to students and young researchers with a hands-on experience with the DP, which comprises coupled simulation of devices, interconnects, circuits, electromagnetic (EM) fields and thermal effects in one single framework. Furthermore, the project has a Virtual Working Place system in which it is possible to share experiments and results among the partners. As this domain of knowledge is very complex - there are strong requirements in Industry in order to train young researchers and improve the know-how in a process of continuous education in these topics - the approach we propose overcomes the traditional difficulties of delivering contents, providing the user with a transparent interface, which hides the mathematical technalities. The user has only to follow a procedure by using a visual, tactile and explorative interface. It allows a graphical access to a preset library of models in the form of equations and algorithms for model manipulation. Furthermore, in this approach the researcher can define new models and algorithms by means of a constructivist metaphor. Finally, this method permits an easy control of the DP simulation function, together with a complete monitoring and data analysis facility.
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    The Dance of the Air: a Case Study in Interactive Digital Art
    (The Eurographics Association, 2007) Cuoghi, E.; Gherardi, R.; Toldo, R.; Raffaele De Amicis and Giuseppe Conti
    This paper describes the conception and realization of an interactive art installation called The Dance of the Air . The whole process is taken as a case study for the different challenges encounteredduring the implementation of the system. The project is followed from the seminal idea to the artistic specifications, the translation into technical requirements and the final deployment step.
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    Dynamic Rail Inspection by Vision System
    (The Eurographics Association, 2007) Cerniglia, D.; Nigrelli, V.; Prior, F.; Raffaele De Amicis and Giuseppe Conti
    Current in-field rail track ultrasonic inspection technologies, requiring contact between the probes and the rail surface, show limitations as defect detection is affected by rail surface condition, rail head geometry and defect geometry and orientation. Moreover, inspection speeds are moderate. To improve rail flaw detection, the partnership of the U-Rail project - within the sixth EU framework programme - proposes a new non-contact ultrasonic inspection system, consisting of a pulsed laser and air-coupled transducers. For a proper positioning, the inspection unit includes a laser optic triangulation unit and an automatic positioning system. The first determines the position of the rail, processes the data and drives the positioning system. The U-Rail system allows high speed inspection of the complete rail section. The paper describes the system and results of research activities of two U-Rail partners.
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    Developing a Virtual Training System in Aeronautical Industry
    (The Eurographics Association, 2007) Gironimo, G. Di; Guida, M.; Raffaele De Amicis and Giuseppe Conti
    The paper deals with the developing of a virtual training system to be implemented in an aeronautic company. The strength of the training method based on the use of Virtual Reality is the high degree of interactivity that it is possible to obtain in a virtual environment. In fact, unlike the traditional methods based on classroom lessons supported by slides and videos that only allow a passive participation of the users to the training, Virtual Reality, with its immersive environments, allows the students both to visualize realistically the contents of the lesson, and to interact with the represented objects. According to that, thanks to the collaboration with Alenia, one of the most important Italian companies in the aeronautical field, we elaborated an innovative virtual training methodology, named AVIRA, specifically dedicated to the users working with composed materials. For the development of this system we started from a real case regarding a particular production process of a specific component. The considered production process is the stratification/lamination of carboresin, used for the fabrication of aeronautical components of high technological content, that is currently active at Alenia Aeronautica in Foggia.