.: SIBGRAPI 2012 - Message from Chairs :.
Message from The General Chairs
SIBGRAPI 2012 - Conference on Graphics, Patterns and Images (formerly Brazilian Symposium on Computer Graphics and Image Processing) is the 25th edition of this conference, which is annually promoted by the Brazilian Computer Society (SBC) through its special interest group on Graphics and Image Processing (CEGRAPI). SIBGRAPI is the most traditional meeting in Latin America on Computer Graphics, Image Processing, Pattern Recognition, Computer Vision and related areas. Although SIBGRAPI have already been organized twice in Minas Gerais, Brazil, this is the first time it takes place in the historic and charming town of Ouro Preto.
In this year, the conference is being organized by the Computing Department (DECOM) of Universidade Federal de Ouro Preto (UFOP). We are delighted to introduce an exciting program, with four internationally renowned researchers as invited speakers. Besides the traditional full-papers track and the workshops of Theses and Dissertations (WTD), Undergraduate Works (WUW) and Works in Progress (WIP), this year we announce two workshops: Workshop on Industry Applications (WGARI), which aims at integrating industry and academic researchers; and the Workshop on Interactive Visualization, in its 3rd edition, which will include an invited talk by a leading researcher in Data Visualization.
Moreover, in this year, we have obtained the technical co-sponsorship from IEEE Computer Society, and we maintained the status of "in cooperation" with the European Association for Computer Graphics (Eurographics).
Besides the traditional electronic proceedings distributed to the participants, WTD, WUW, WIP, WGARY and WiVIS papers will be available through the website, and the technical papers sessions will be recorded and also made available. The technical papers will be included in the IEEE Digital Library and are already available at the SIBGRAPI Digital Library Archive, maintained by Instituto Nacional de Pesquisas Espaciais (INPE).
We are very grateful to all the chairs for their excellent work leading SIBGRAPI 2012 activities. We also would like to thank the authors of technical papers, tutorials, and workshops and the invited speakers for their invaluable collaboration to the success of SIBGRAPI 2012. Finally, we would like to thank the support from Universidade Federal de Ouro Preto (UFOP), Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES), Fundação de Amparo à Pesquisa de Minas Gerais (FAPEMIG), Parque Metalúrgico (Centro de Artes e Convenções da UFOP), APERAM, Google, Microsoft, and Sociedade Brasileira de Computação (SBC).
We wish all participants a time full of opportunities for sharing their work and learn from others. Welcome to SIBGRAPI 2012!
David Menotti, Guillermo Cámara Chávez and José Maria Ribeiro Neves
General and Local Chairs
Message from The Program Chairs
Welcome to the 25th SIBGRAPI - Conference on Graphics, Patterns and Images!
SIBGRAPI is the most prestigious conference in South America dedicated to Computer Graphics, Image Processing, Computer Vision, Pattern Recognition, and related areas. Formerly known as the Brazilian Symposium on Computer Graphics and Image Processing, it has been held in Brazil since 1988. SIBGRAPI has the status of "in cooperation" with Eurographics since 2009, and this year the conference obtained the technical co-sponsorship from the IEEE Computer Society.
To celebrate the 25th anniversary of SIBGRAPI in the historical city of Ouro Preto, Minas Gerais, we prepared a strong program with four keynote speakers, six tutorials and 45 papers in the technical papers track, as well as the traditional workshops of theses and dissertations (WTD), undergraduate works (WUW) and works in progress (WIP). Moreover two special workshops are also been held as part of the program, the Workshop on Industry Applications (WGARI), and the Workshop on Interactive Visualization.
For the technical papers track, we received 103 submissions authored by 330 researchers from 12 countries, which were reviewed by 158 researchers. After the double blind review process, we accepted 45 papers, involving 165 different authors from 8 different countries. We thank all these authors, who have chosen SIBGRAPI to submit their work, and the reviewers, who dedicated a lot of their valuable time in the revision process.
We are deeply grateful to the local organization committee, the chairs and several committees in charge of the different technical activities, the invited speakers, the session chairs, and the tutorial instructors.
Finally, we thank several institutions that supported directly or indirectly the organization of SIBGRAPI 2012: Universidade Federal de Ouro Preto (UFOP), the Brazilian Computer Society (SBC), Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES), Fundação de Amparo à Pesquisa de Minas Gerais (FAPEMIG), Parque Metalúrgico (Centro de Artes e Convenções da UFOP), APERAM, Google and Microsoft.
We wish all participants a great sharing experience during SIBGRAPI 2012!
Carla Dal Sasso Freitas, Roberto Scopigno, Sudeep Sarkar and Luciano Silva
Program Co-Chairs
Message from The Tutorials Chairs
Welcome to SIBGRAPI 2012 Tutorials. This year we have six tutorials on exciting topics in computer graphics, image processing and computer vision. Here you will find the survey papers the authors of selected tutorials were invited to submit, as well as the handouts used during the class presentation. We hope this material will inspire new exciting research in our fields!
We would like to thank the general organization for their support and the Universidade Federal de Ouro Preto (UFOP) for providing logistical and financial support. Finally, we would like to thank all tutorial authors, reviewers, and the organization committee of SIBGRAPI 2012.
Marcelo Walter and Lijun Yin
Tutorials Chairs
Message from The Workshop of Theses and Dissertations Chairs
The Workshop of Theses and Dissertations (WTD) aims to motivate discussions among graduate students and experts around the graduate-level research related to the topics covered by the SIBGRAPI.
Accepted works are included in the electronic proceedings, formatted in six-page papers and written in Portuguese or in English. This year, we received 37 submissions. During the review phase, each paper was evaluated by two different referees, leading to 31 accepted works for poster presentation during the event.
We would like to thank the authors, for their invaluable contribution, and the reviewers, who dedicated a lot of their valuable time in the revision. Finally, we would like to congratulate the local organizing committee and the program committee for their excellent work leading the SIBGRAPI activities.
Helio Lopes and Nina Hirata
WTD Chairs
Message from The Workshop of Undergraduate Works Chairs
The main goals of the Workshop of Undergraduate Works (WUW) are to motivate undergraduate students involved in research projects on Computer Graphics and Image Accepted works are included in the electronic proceedings, formatted in six-page papers and written in Portuguese or in English.
In this year, we received 29 submissions. During the review phase, each paper was evaluated by at least two different referees, leading to 27 accepted works for poster presentation during the event.
We would like to thank the authors, for their invaluable contribution, and the reviewers, who dedicated a lot of their valuable time in the revision. Finally, we would like to congratulate the local organizing committee and the program committee for their excellent work leading the SIBGRAPI activities.
Afonso Paiva Neto and Joao Paulo Papa
WUW Chairs
Message from The Workshop of Works in Progress Chairs
WIP is a workshop dedicated to present works in progress in all areas of Computer Graphics, Image Processing and Computer Vision. Its main goal is provide, to undergraduate and graduate students, a stimulating environment to discuss ongoing research, sketches and other technical information of potential interest of the SIBGRAPI community. Accepted works are included in the electronic proceedings, formatted in two-page papers and written in Portuguese or in English.
This year, we received 37 submissions. During the review phase, each paper was evaluated by three different referees via a double blind-review process, leading to 30 accepted works for poster presentation during the event.
We would like to thank the authors, for their invaluable contribution, and the reviewers, who dedicated a lot of their valuable time in the revision. Finally, we would like to congratulate the local organization committee and the program committee for their excellent work leading the SIBGRAPI activities.
Denise Guliato and Thales Vieira
WIP Chairs
Message from The Workshop on Industry Applications
The Workshop on Industry Applications (WGARI) is a forum dedicated to solutions based on graphics, patterns, and images, for industry applied problems. Contributions feature innovative use of original or known methods and/or tools from interactive graphics and visualization, machine vision, and image processing.
WGARI 2012 received 9 paper submissions, and each paper was evaluated, double-blind, by two reviewers. We accepted 7 of them, leaving out only the papers whose rejection was recommended by at least one reviewer. All papers will be presented orally.
In 2012, WGARI receives as Invited Speaker Alisson Sol, Engineering Lead for the Computer Vision team of the Kinect for Windows Business Unit at Microsoft, in Redmond, WA, USA.
We now urge the academic and industrial research communities to attend the workshop, and enjoy this newly created environment to showcase research efforts describing visualization and/or graphics-based solutions for applied problems.
We look forward to seeing you at WGARI - SIBGRAPI!
André Vital Saúde and Silvio Jamil Ferzoli Guimarães
WGARI Chairs
Message from The Workshop on Interactive Visualization
The Workshop on Interactive Visualization (WIVis) aims to provide a forum where visualization groups can share ideas towards fostering collaboration, as well as bring attention to the subject of visualization within the Brazilian Computer Science community. In fact, at least two of the great challenges in Computer Science research in Brazil from 2006 to 2016 explicitly involve interactive visualization tasks, and the WIVis workshop has been the only Brazilian effort to address the visualization subject in Brazil.
Besides group presentations, the WIVis 2012 brings Prof. Kwan-Liu Ma from University of California Davis (UC Davis) as the invited speaker. A roundtable to discuss future prospects for interactive visualization in Brazil and Latin America closes the event.
We are certain that WIVis 2012 will help promote visualization in the Brazilian computer science community, encouraging young researchers to the field.
Fernando Paulovich, João Comba and Luis Gustavo Nonato
WIVis Chairs
