Computer Graphics and Visualization › Publications

2019

Indirect illumination computed from 1M animated virtual point lights (VPLs) with shadow maps of 162 resolution generated at interactive rates (100 ms, out of 194 ms for the image in total) by our many-view rendering algorithm (a). We show shadow maps of a subset of 2048 VPLs, for which many pixels are shared and rendered only once for multiple views (b). We highlight two close
Timothy R. Kol, Pablo Bauszat, Sungkil Lee, and Elmar Eisemann
MegaViews: Scalable Many-View Rendering With Concurrent Scene-View Hierarchy Traversal
Computer Graphics Forum, 2019
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Screenshot of our interactive web application, which allows users to explore linked 2D and 3D anatomy contained in the VSP atlas.
Noeska Natasja Smit, Kai Lawonn, Anne C. Kraima, Marco C. Deruiter, Stefan Bruckner, et al.
Model-based Visualization for Medical Education and Training
In Proceedings of Eurographics (Dirk Bartz Prize), 2019
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Overview of the system baseline. A many-light solution is baked into a lightmap using shadow mapping and rasterization, providing complex diffuse GI independent from the view-point. Baked solutions typically require complete recalculations, interrupting a continuous work flow. Our proposed approach extends such a system by an efficient update mechanism performing an incremental transition to the new illumination state.
Christan Luksch, Michael Wimmer, and Michael Schwärzler
Incrementally baked global illumination
In Proceedings of I3D, 2019
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Examples of generated bedrooms from content chunks reduced from the motifs of Kermani et al. and SceneSeer. Note that more objects are generated using SceneSeer’s generation method (independently of the motif method). Furthermore, more sets are stored in the motif method of SceneSeer than of Kermani et al..
J. Timothy Balint and Rafael Bidarra
A generalized semantic representation for procedural generation of rooms
In Proceedings of FDG, 2019
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From an input mesh representing the surface of a vessel, our algorithm detects and segments the aneurysms in the vessel. Afterwards, a report is generated including meta information on the patient as well as summaries of characteristics of the aneurysms, e.g., their widths and heights.
Kai Lawonn, Monique Meuschke, Ralph Wickenhoefer, Bernhard Preim, and Klaus Hildebrandt
A Geometric Optimization Approach for the Detection and Segmentation of Multiple Aneurysms
Computer Graphics Forum, 2019
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Pixel-perfect hard shadows produced by our method in the Citadel scene from different viewpoints.
Baran Usta, Leonardo Scandolo, Markus Billeter, Ricardo Marroquim, and Elmar Eisemann
A Practical and Efficient Approach for Correct Z-Pass Stencil Shadow Volumes
In Proceedings of High Performance Graphics (Short Papers), 2019
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Our novel interactive approach for shape detection in point clouds allows for sophisticated interactions: Left: A Lasso selection selects only points that lie on the support shape as shown in the top image. Points in front and back of the support shape are not selected (bottom). Middle: A volumetric brush selection is performed on the selected support shape (top). Points are only selected if they belong to the support shape and intersect the brush (bottom). Right: Interactive LoD increment interaction along the selected support shape (drawn in red). The top image shows the original rendering model of the point cloud; the bottom image shows the point cloud with the additional points.
Harald Steinlechner, Bernhard Rainer, Michael Schwärzler, and Georg Haaser
Adaptive pointcloud segmentation for assisted interactions
In Proceedings of I3D, 2019
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: Comparison between gradient-domain reconstruction and Monte Carlo denoising. For surface rendering, gradient-domain rendering is less efficient than Monte Carlo denoisers that use auxiliary buffers (NFOR [BRM∗ 16]) or histograms of path samples (BCD [BB17]). NFOR could also be applied to address noisy regions remaining in gradient-domain path tracing by using the reconstructed image as guiding features, leading to improved image quality (see G-PT + NFOR in the KITCHEN scene). For volume rendering, gradient-domain rendering is comparable to Monte Carlo denoisers, particularly with photon density estimation.
B. S. Hua, A Gruson, Victor Petitjean, M Zwicker, D Nowrouzezahrai, et al.
A Survey on Gradient-Domain Rendering
Computer Graphics Forum, 2019
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CyTOFmerge pipeline: Split the sample, stain each partial sample with a different marker panel and apply CyTOF to obtain the panels’ measurements. Both panels A and B share a set of markers m (green). L1 (red) are unique markers of panel A, and L2 (blue) are unique markers of panel B. Both panel measurements are combined to obtain an extended markers measurements per cell, which is input to downstream computational analysis as, for example, clustering in a t-SNE mapped domain shown here.
Tamim Abdelaal, Thomas Höllt, Vincent van Unen, Boudewijn P. F. Lelieveldt, Frits Koning, et al.
CyTOFmerge: integrating mass cytometry data across multiple panels
Bioinform, 2019
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Thomas Höllt, Anna Vilanova, Nicola Pezzotti, Boudewijn P. F. Lelieveldt, and Helwig Hauser
Focus+Context Exploration of Hierarchical Embeddings
Computer Graphics Forum, 2019
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Left: Input shapes X1 and X2 (taken from [PRMB15]) and reconstruction of linear average (Z(X1) +Z(X2))/2 ∈ M/ with the local violations of the integrability condition as color map. Rightmost shapes: reconstruction using various spanning trees color coded with respect to the order of traversal.
Josua Sassen, Behrend Heeren, Klaus Hildebrandt, and Martin Rumpf
Geometric optimization using nonlinear rotation-invariant coordinates
CoRR, 2019
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Four highly glossy spheres moving in different directions with 64 samples per pixel. In each subfigure: corresponding render, difference with reference and highlighted regions.
Jerry Guo and Elmar Eisemann
Geometric Sample Reweighting for Monte Carlo Integration
CoRR, 2019
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Streak visualization showing the formation, shedding and breakdown of a vortex in a patient with an aortic dissection in the aortic arch and regurgitation is present in the ascending aorta. The corresponding video can be found in the supporting material.
Niels de Hoon, Kai Lawonn, A.C. Jalba, Elmar Eisemann, and Anna Vilanova
InkVis: A High-Particle-Count Approach for Visualization of Phase-Contrast Magnetic Resonance Imaging Data
In Proceedings of Visual Computing in Biology and Medicine, 2019
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The components of LightGuider: (a) a 3D modeling view to place and modify luminaires, augmented with (b) a provenance tree, depicting several sequential modeling steps and parallel modeling branches, integrating information on the quality of the individual solutions, and providing guidance by pre-simulating and suggesting possible next steps to improve the design. A film-strip-like visualization (c) of screenshots helps to depict the evolution up to the currently selected state. A quality view (d) informs about the fulfillment level of the illumination constraints that need to be met, using bullet charts. Changing the weights of these constraints (e), and therefore, the lighting designer’s focus, triggers an update of the provenance tree node visualizations (reflecting the weights of the constraints in the distribution of the treemap space). Moreover, the defined weights are also considered in the generation of new suggestions, which are tailored towards satisfying constraints with higher weights.
Andreas Walch, Michael Schwärzler, Christan Luksch, Elmar Eisemann, and Theresia Gschwandtner
LightGuider: Guiding Interactive Lighting Design using Suggestions, Provenance, and Quality Visualization
CoRR, 2019
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HotPipe: screen capture of an early game level
Liam Mac an Bhaird, Mohammed Al Owayyed, Ronald van Driel, Huinan Jiang, Runar A. Johannessen, et al.
Learning geothermal energy basics with the serious game HotPipe
In Proceedings of GALA, 2019
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The setup used to play Loud and Clear
Berend Baas, Dennis van Peer, Jan Gerling, Matthias Tavasszy, Nathan Buskulic, et al.
Loud and Clear: the VR game without visuals
In Proceedings of GALA, 2019
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OMiCroN overview. A renderable hierarchy is maintained while inserting incoming nodes in parallel. This cycle is repeated until the whole hierarchy is constructed.
Vinicius da Silva, Claudio Esperança, and Ricardo Marroquim
OMiCroN - Oblique Multipass Hierarchy Creation while Navigating
Computers & Graphics, 2019
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A portal through which a laser can be teleported.
Bob Dorland, Lennard van Hal, Stanley Lageweg, Jurgen Mulder, Rinke Schreuder, et al.
Quantum physics vs. Classical physics: introducing the basics with a virtual reality game
In Proceedings of GALA, 2019
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Stacked kernel processing times in Ordinary LE/TM, and stacked kernel overheads due to property computation in Early LE/TM and Late LE/TM measured on four image families (a)-(d), at 8192 × 8192 pixels. For each family member, represented by a point in the x-axes of the respective plot groups (a)-(d), kernel processing times and overheads were averaged over 100 executions. Analogous kernels in LE/TM are colored similarly. The vertical order of the colored stripes does not necessarily reflect the order of operations.
Pedro Asad, Ricardo Marroquim, and Andréa L. e L. Souza
On GPU Connected Components and Properties: A Systematic Evaluation of Connected Component Labeling Algorithms and Their Extension for Property Extraction
IEEE Trans Image Process, 2019
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Left: single frame from 240Hz short-exposure video and a simulated long exposure at 30Hz by averaging 8 frames. Middle: Using the 240Hz input, our method enables mixing a long exposure in the periphery with a short exposure for the details on the pendulum. Via user annotations in the video, different shutter functions can be defined (top right). Annotations and shutter functions can be keyframed over time. Based on the annotations, our method defines an interpolated shutter function for each pixel (bottom right).
Nestor Z. Salamon, Markus Billeter, and Elmar Eisemann
ShutterApp: Spatio-temporal Exposure Control for Videos
Computer Graphics Forum, 2019
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