TC18 - Newsletter #5 - July 2005 ===================================== Contents: ========= 1. Call for help: educational part of web site 2. Report on 12th DGCI conference in Poitiers ===================================== Contents: ========= 1. Call for help: educational part of web site (http://www.tc18.org/) We would like to propose to our community, via the TC18 web page, a good state of the art on discrete geometry. To do that, we need some help from researchers involved in the different sub-fields of discrete geometry. The idea is to have a few volunteers for each of the sub-fields, who will select and define basic references, lectures, slides, and materials. The defined sub-fields are: * Grids, cells, structures and topology (digital topology, graph theory and combinatorics) * nD objects and recognition (border tracking, discrete analytical objects (lines, planes, circles)) * Discrete distances and skeletons (square and diamond distances, chamfer distances, euclidean distance, skeletons, medial axis and medial lines/surfaces) * Discrete geometrical transforms (rotations, magnification) * Various shape representation (hulls, multiscale shapes, Fourier moments, fractals) * Features extraction and similarity measures (convexity, lengths and areas, curvature, normals) * Examples of applications image rendering, compression, ... If you can spend a few time to help, please contact firstname.lastname@example.org and precise for which topic you are interested. Concerning the image and code databases, several people provided various things... thanks to the contributors. 2. Report on 12th DGCI conference in Poitiers (by Guillaume Damiand and Attila Kuba) In 2005, the twelfth edition of the conference Discrete Geometry for Computer Imagery was held in Poitiers, France, April 13-15 2005. The conference was organized by the laboratory SIC - "Signal, Image, Communications" of the University of Poitiers, Centre National de la Recherche Scientifique and the Technical Committee 18 of the International Association of Pattern Recognition. The series of DGCI conferences, started in 1991, is now the main conference of TC18-IAPR (TC18 opened in November 2002 on discrete geometry: http://www.tc18.org/). For this edition, Eric Andres was the general chair, Pascal Lienhardt the program chair and Guillaume Damiand the publications chair. DGCI 2005 was sponsored by the Faculty of Science, the University of Poitiers, the Region of Poitou-Charentes and the International Association for Pattern Recognition (IAPR). The conference venue was the IFMI building on the Futuroscope campus ground in Chasseneuil du Poitou, near the Futuroscope park. The DGCI conference attracted again for this edition many excellent papers with 53 submitted papers from 21 countries. After careful reviewing by two and sometimes three reviewers, 36 papers have been accepted from which 22 were selected for oral presentation and 14 as posters. The conference brought together 84 participants, coming from 17 countries. As usual at DGCI conferences, there was a low cost registration for students. This year's conference was organized in combination with the 5th Workshop on Graph-based Representations in Pattern Recognition. The GBR workshop aims at using graph-based structures in image analysis. There is a strong connection between the community interested by the GBR workshop and the discrete geometry community. For this reason and for the first time, GBR and DGCI were organized in the same place with a common session of four papers, two of which were submitted to GBR and two to DGCI. The talk and poster sessions covered topics such as reconstruction and recognition, discrete topology, uncertain geometry, visualization, discrete models and transforms, morphology and tomography including various applications. Three invited speakers showed new important views to the field of discrete imagery: Prof. Achille Braquelaire gave a talk devoted to "Representing and Segmenting 2D Images by means of Planar Maps with Discrete Embeddings: from Model to Applications"; Prof. Peter Veelaert gave a talk on "Uncertain Geometry in Computer Vision"; and Prof. Jean-Pierre Guedon spoke about "The Mojette Transform: the First Ten Years". The conference was well organized, the program run smoothly without any problem. The available infrastructure, including the audio/projections, computer equipment, Internet connection, worked according to high standard. The social program contained a reception and also a conference banquet, both of them had big success among the participants. Proceedings of the conference are published by Springer in "Lecture Notes in Computer Science" #3429. Two special issues will come out soon: one in "Image and Vision Computing Journal" and the other in "Computer and Graphics". The next DGCI Conference will held in Szeged, Hungary, November 8-10 2006, organized by the Dept. of Image Pocessinng and Computer Graphics, Univ. of Szeged, with Prof. Attila Kuba at General Chair. See http://www.tc18.org/ for more details about the conference and moreover about the TC18-IAPR on Discrete Geometry. 06th July 2005 - David and Annick.