Computer Graphics and Visualization › Publications

2016

Olatz Castano, Ben Kybartas, and Rafael Bidarra
TaleBox - a mobile game for mixed-initiative story creation
In Proceedings of DiGRA-FDG 2016, 2016
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2015

We simulate the change of image appearance between photopic conditions (left) and appearance in scotopic conditions close to the absolute threshold (right), where consistent vision fades into temporally varying (not reproducible in print) noise.
Petr Kellnhofer, Tobias Ritschel, Karol Myszkowski, Elmar Eisemann, and Hans-Peter Seidel
Modeling Luminance Perception at Absolute Threshold
Computer Graphics Forum, 2015
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Screenshots of each prototype. Figure 2a shows a sample story built in Smart Storybook. Figure 2b shows the noun selection menu in Improv Game
Ben Kybartas and Rafael Bidarra
A Semantic Foundation for Mixed-Initiative Computational Storytelling
In Proceedings of ICIDS, 2015
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Depth Layering: While a single layer will result in a single average over all geometry (a), we can slice our scene in multiple depth layers to obtain averages for each layer separately (b).
Quintijn Hendrickx, Leonardo Scandolo, Martin Eisemann, and Elmar Eisemann
Adaptively layered statistical volumetric obscurance
In Proceedings of High Performance Graphics, 2015
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Prototype Visualization
Michael Stengel, Steve Grogorick, Martin Eisemann, Elmar Eisemann, and Marcus Magnor
An Affordable Solution for Binocular Eye Tracking and Calibration in Head-mounted Displays
In Proceedings of ACM Multimedia, 2015
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The player has to avoid the frogs in a swamp and reach the end.
Kevin Allain, Bas Dado, Mick van Gelderen, Olivier Hokke, Miguel Oliveira, et al.
An audio game for training navigation skills of blind children
In Proceedings of SIVE@VR, 2015
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Our framework for spacetime optimization efficiently generates planned motion of complex articulated characters. Snapshots of an animation of a four-legged character performing a handstand followed by a twisting jump are shown.
Christian Schulz, Christoph von Tycowicz, Hans-Peter Seidel, and Klaus Hildebrandt
Animating articulated characters using wiggly splines
In Proceedings of Symposium on Computer Animation, 2015
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a) Foldios are designed in 3D. Print&fold layouts are automatically generated, including customized printable electronics for sensing and output. The technique enables quick, easy and inexpensive fabrication of a wide variety of folded interactive objects, including b) UbiComp devices, c) actuated shape-changing objects and d) lightweight paper crafts.
Simon Olberding, Sergio Soto Ortega, Klaus Hildebrandt, and Jürgen Steimle
Foldio: Digital Fabrication of Interactive and Shape-Changing Objects With Foldable Printed Electronics
In Proceedings of UIST, 2015
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A complex scene with fine details and global illumination. Left: Images rendered with PBRT [PH10] using 32 samples per pixel rendered in 2.5 minutes. Middle: Image reconstructed by our algorithm in 2.6 minutes including rendering and filtering. Right: Equal error image with 200 samples per pixel rendered in 12.7 minutes.
Pablo Bauszat, Martin Eisemann, Elmar Eisemann, and Marcus Magnor
General and Robust Error Estimation and Reconstruction for Monte Carlo Rendering
Computer Graphics Forum, 2015
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Our initial TF for the PET dataset is defined using only a single value. After defining the α value, the TF can further adjusted if needed.
Kai Lawonn, Noeska Natasja Smit, Bernhard Preim, and Anna Vilanova
Illustrative Multi-volume Rendering for PET/CT Scans
In Proceedings of Visual Computing in Biology and Medicine, 2015
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In-game view of a part of the resulting level of Figure 2
Daniel Karavolos, Anders Bouwer, and Rafael Bidarra
Mixed-Initiative Design of Game Levels: Integrating Mission and Space into Level Generation
In Proceedings of FDG, 2015
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Petr Kellnhofer, Tobias Ritschel, Karol Myszkowski, Elmar Eisemann, and Hans-Peter Seidel
Modeling Luminance Perception at Absolute Threshold
Computer Graphics Forum, 2015
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Left full exposure, pins can be deployed anywhere on the bone/cartilage. Right limited exposure. The orthopedic surgeon paints the areas on the bone that are deemed accessible during surgery, thus limiting where pins can be deployed
Thomas Kroes, Edward R. Valstar, and Elmar Eisemann
Numerical optimization of alignment reproducibility for customizable surgical guides
International Journal of Computer Assisted Radiology and Surgery, 2015
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Manipulation of different entity types within the same scene. A street entity led to the generation of several buildings, represented as shapes. Each building was given a number which was then used to produce a custom texture to attach next to each door. Light sources were then instanced on the location of each street lamp, just above the doors. The generation of each entity type therefore greatly benefits when processed in sequence, in a single pipeline, instead of in separate environments.
Pedro Silva, Elmar Eisemann, Rafael Bidarra, and Antonio Coelho
Procedural Content Graphs for Urban Modeling
Int J Comput Games Technol, 2015
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A visualization of a salt marsh located in the Netherlands, rendered with our framework.
Benny Onrust, Rafael Bidarra, Robert Rooseboom, and Johan van de Koppel
Procedural generation and interactive web visualization of natural environments
In Proceedings of Web3D, 2015
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Snapshots from an interactive shape interpolation session with five example poses of an armadillo shell model with 332k triangles. After a preprocess, our framework for nonlinear shape interpolation computes weighted average poses in real-time
Christoph von Tycowicz, Christian Schulz, Hans-Peter Seidel, and Klaus Hildebrandt
Real-Time Nonlinear Shape Interpolation
ACM Transactions on Graphics, 2015
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Left: single scattering using the original geometry of the scene. The leaves of the tree block most of the light, causing only a subtle scattering effect. Right: scattering created by occluder manipulation. Using our system, an artist can easily add holes into the shadow map of the tree, causing an increased amount of and more interesting scattering effects. While physically incorrect, it is not visible to the viewer that the right image uses fake occlusion information. Insets show the scattering only. Surface shadows are created from the unmodified shadow map.
Oliver Klehm, Timothy R. Kol, Hans-Peter Seidel, and Elmar Eisemann
Stylized scattering via transfer functions and occluder manipulation
In Proceedings of Graphics Interface, 2015
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Example of a notification that reminds the user that a stroll is available.
Jurgen van Schagen, Martijn Gribnau, Jean de Leeuw, Benjamin Los, Nick Cleintuar, and Rafael Bidarra
Super Starfish Mania: Fish for Friends
In Proceedings of CHI PLAY, 2015
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Exposure comparison
Michael Stengel, Pablo Bauszat, Martin Eisemann, Elmar Eisemann, and Marcus Magnor
Temporal Video Filtering and Exposure Control for Perceptual Motion Blur
IEEE Transactions on Visualization and Computer Graphics, 2015
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Different ways to visualize the expansion of “Detective #firstName# #surname# #sipped# the #coffee#. It was #coffeeJudgement#, like life”. Right: visualizing the grammar’s connectivity shows how each symbol (in dark blue) can expand to many different options (pale blue). Left: visualizing five sample expansions demonstrates where each story varies or remains the same. Bottom-left: fully expanded text, as it would be read by the end reader (Color figure online).
Kate Compton, Ben Kybartas, and Michael Mateas
Tracery: An Author-Focused Generative Text Tool
In Proceedings of ICIDS, 2015
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