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Institut für Computergraphik und Algorithmen
Abteilung für Computergraphik


Michael Wimmer, Andreas Traxler, Helwig Hauser

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Up to December 13, 2004, we received a large number of announcements of participation in reply to the Call for Participation of CESCG 2005. Thus, we are proud to publish the preliminary program of CESCG 2005. Unfortunately, we were not able to accomodate all requested slots, but we have tried to make a fair selection. Please have a look at the list of talks below and send us as soon as possible the information still missing in the table (names, talk titles).

To prepare the successful preparation of printed proceedings and web proceedings for the seminar, we want to remind the participants about how to proceed in preparing their contributions. The detailed timetable can be found in the Call for Participation.

A Note to Participants

Participants are required to upload a zipped version of their submission (including possible supplementary material like additional images, movies, ..., for reviewing) via our submission page by February 4, 2005, 23:59 CET at the latest. Note that this year we do not require an anonymous version. The material will then be distributed for reviewing. Reviews will be sent to the authors by February 28. Final submissions must be uploaded by March 11th, 2005, 23:59 CET at the latest. Submissions which are uploaded after this deadline CANNOT be published in the printed version of CESCG 2005 proceedings. As the HTML version of the proceedings will be prepared in parallel with their printed version, the HTML files have to be here by the same deadline, as well.

Please read the upload instructions which are available at our submission web page carefully, such that we have no problems to include all the contributions in the proceedings. Please recall that only those contributions are included in any form of seminar proceedings, that conform to the "Guidelines for Authors" as specified at!

Please also make sure that all participants of CESCG 2005, esp. the speakers and supervisors, do register as early as possible via the registration page!

Preliminary Seminar Schedule

The seminar schedule is again divided into three days. We have two invited talks sessions, six paper sessions, coffee breaks and lunch and again very popular social programs. See the details in the following time table: [not yet available]

9 May 2005 10 May 2005 11 May 2005
7:30 - 8:30 Travelling Breakfast Breakfast
8:30 - 10:10 Session 3: Ray Casting and Panoramic Images Session 7: Geometric and Point-Based Algorithms
10:10 - 10:40 Coffee Break Coffee Break
10:40 - 11:00 Registration Session 4: Computer Vision and Medical Applications IPC Meeting
11:00 - 12:20 Session 8: Invited Talk by Radoslaw Mantiuk
12:20 - 14:00 Lunch Lunch Closing Ceremony
14:00 - 15:40 Session 1: Real-Time Rendering Effects Session 5: HDR, Textures and Images Travelling
15:40 - 16:10 Coffee Break Coffee Break
16:10 - 17:50 Session 2: Virtual Reality and Web-Based Applications Session 6: Invited Talk by Reinhard Klein
17:50 - 18:30 Spare Time Spare Time
18:30 - open

Invited Talks

The organizers of CESCG 2005 are proud to announce the invited talks to be held at the seminar:

Invited Speaker
Reinhard KLEIN,
Title:Realistic Materials in Computer Graphics

Realistic modeling of the interaction of light with objects is one important challenge in photorealistic or predictive rendering. Since the modeling of a desired appearance using parametric reflection models can be rather tideous task one way to obtain realistic reflection properties are measurements of real world surfaces. For arbitrary (non-fluorescent, non-phosphorescent) materials, the reflection properties can be described by the 8D reflectance field of the surface, also called BSSRDF. Since densely sampling an 8D function is currently not practical various acquisition methods have been proposed which reduce the number of dimensions by restricting the acquisition to specific classes of materials. A subsequent data modeling step is performed to interpolate missing values and compress the measured data further. In the first part of this talk we will give a brief overview over the different measurement techniques and algorithms used to capture reflection properties of different classes of objects targeted to the specific needs of computer graphics applications. Special emphasis will be given to surfaces with complex meso-structure. In the second part we will discuss some techniques we used for the validation of the measurements and the resulting renderings. Strength and limitations of different aquisition and validation techniques will be discussed and future challenges will be identified.

Radoslaw MANTIUK,
Title: Digital photography in realistic computer graphics

Despite of many years' researches, better and better graphics hardware, tremendous improvement of graphics algorithms, pictures generated by computers are still far from being perfect. We've been trying to synthesize realistic visual effects for many years but, to be quite honest, achieving photo-realism will not be possible very soon. Plenoptic function, which describes the color of any point in 3D, watching at any direction, in any range of light frequency, and in any time moment is too complex (please notice its 7-dimensions) and we don't know how to approximate it accurately. The best known approximation of plenoptic function is a classic photography. So why not to use photos in computer graphics. Taking photographs is a quite easy task, acquisition devices are technology developed and popular, storing is very efficient. Photographs can be used as a textures and environment maps in real time graphics systems. They can store information about light propagation and be used in global illumination algorithms. Recently, the latest constrain of photographs usage - limited dynamic range - seems to be overcome due to HDR (High Dynamic Range) images. HDR photos enables to light up the artificial imaginary in the most natural way. Thanks to photography, realistic visualization can be achieved based on relatively simple computation rather then complex global illumination models. An intention of the talk is to present various possibilities of using photographs in computer graphics. Especially, HDR images abilities are going to be discussed.

Preliminary Program

In the following we present all the talks announced for CESCG 2005.

In case of missing information (no name or title yet, etc.) we ask the concerning group to send the missing data as soon as possible.

Country City First Name Last Name Title
Austria Hagenberg Matthias Bauer Image-based rendering for real-time applications
Wien (VRVis) Henning Scharsach Advanced GPU Raycasting
Fabian Bendix Visual Analysis Tool for Categorical Data - Parallel Sets
Wien (VUT) Johanna Schmidt Practical Implementation of a Texture Synthesis Algorithm
Daniel Scherzer Robust shadow maps for large environements
Bosnia Sarejevo Emir Beca Panoramic Views in Virtual Sarajevo
Czech Republic Brno Josth Radovan Real time atmosphere rendering for space simulators
Michal Seeman Precise Merging of Multiple Phographs
Plzen Jana Hájková Graphical Support of the Traffic Simulation System
Praha Ádám Egressy e-Panel (Virtual Control Panel)
Germany Bonn Ruwen Schnabel Detecting Holes in Surfaces
Hungary Budapest (ELSU) Zoltán Gaál Boolean Operations on Point-sampled Geometry
Budapest (TUB) Mátyás Premecz Optimization Possibilities of a Simple Real-Time Renderer on Modern Graphics Hardware
Balázs Tóth Speed optimized Recursive Ray-tracer with KD-Tree and SSE vector mathematics
Szeged Krisztina Maróti Calibration of CCD cameras for computer aided surgery
Poland Sczeczin Pavel Gorny Highlight Removal Method for HDR Images
Konrad Kabaja Storing of High Dynamic Range Images in JPEG/JFIF files
Slovakia Bratislava (CUT) Zuzana Kúkelová A User Interface for Freeform Modeling Based on Convolution Surfaces from Sketched Silhouette Curves
Martin Bujñák On-line structure from motion
Vlado Roth Web-Based Parameter Space Explorer for Non-Inverible 3D Maps
Bratislava (SUT) Ludovít Lucenic Foot Gait Analysis and Simulation
Slovenia Maribor Timotej Globacnik Progressive compression for lossless transmission of triangle meshes in network applications
Switzerland Zürich Denis Steinemann Generation and Fracturing of Thick Shells
United Kingdom Bristol Matt Aranha Realistic Underwater Visualisation


The 9th Central European Seminar on Computer Graphics is sponsored by the following companies:


Visegrad Fund

Ministry of Education
of Slovakia


Slovenska Sporitelna




our official partner this year: COFAX
and is organized under the auspices of the Austrian ambassador in Slovakia Martin Bolldorf.

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