On the behalf of the Program Committee, it is our pleasure to introduce this volume containing the posters accepted for the Technical Poster Session of the 20^th Brazilian Symposium on Computer Graphics and Image Processing - SIBGRAPI 2007, held in Belo Horizonte from October 7 to October 10, 2007.

In this year we received 50 two-page submissions covering a large spectrum of Brazilian research areas in Computer Graphics and Image Processing. Each paper was evaluated by three referees and, based on their reports and the authors' rebuttals, the Program Committee selected 36 articles for exhibition in the SIBGRAPI 2007 Technical Poster Session.

One novelty in this year is that, as the full papers, all the selected articles are also available on the INPE Uniform Repository which guarantees their continuous availability and increases their visibility and exposure.

We acknowledge Prof. Gerald Banon for granting permissions to the INPE publications server. We would like to thank the reviewers for their careful reviews. In particular, we are grateful to the members of Program Committee for discussions and suggestions along the review process. We would also like to acknowledge Mr. Aquiles Burlamaqui for preparing the electronic version of this volume. And, above all, we wish to thank all the authors for choosing Sibgrapi for submitting their works.

We hope that you will enjoy talking with people in the Technical Poster Session.

Wu Shin - Ting
Luiz Marcos G. Gonçalves
Co-chairs do Sibgrapi 2007 - Technical Poster Session