Computer Graphics and Visualization › Publications

2019

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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The valuables (magenta) have to be dragged to the dropzone (green circle). If the junk (brown) ends up in the dropzone the score decreases. The space snot (large green blob) is an obstacle in which ships and valuables can get stuck.
Shaad Alaka, Max Lopes Cunha, Jop Vermeer, Nestor Z. Salamon, J. Timothy Balint, and Rafael Bidarra
Stimulating ideation in new teams with the mobile game Grapplenauts
Int J Serious Games, 2019
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Facet orchestration in Angelina, where different online sources are used to combine visuals and audio based on the mood and keywords of a Guardian article acting as (external) narrative. The level generator however was not connected to the remaining facets. The in-game screenshot is from [56].
Antonios Liapis, Georgios N Yannakakis, Mark J Nelson, Mike Preuss, and Rafael Bidarra
Orchestrating game generation
IEEE Trans Games, 2019
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Two armadillos (274k tetrahedra) in a pool of water (633k particles) simulated at 60 FPS with a time step of 1/60s. Fluid-deformable interaction and (self-)collisions are handled. The user can interact with the scene through click-and-dragging the meshes.
Christopher Brandt, Leonardo Scandolo, Elmar Eisemann, and Klaus Hildebrandt
The reduced immersed method for real-time fluid-elastic solid interaction and contact simulation
ACM Transactions on Graphics, 2019
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Saskia J Santegoets, Vanessa J van Ham, Ilina Ehsan, Pornpimol Charoentong, Chantal L Duurland, et al.
The Anatomical Location Shapes the Immune Infiltrate in Tumors of Same Etiology and Affects Survival
Clin Cancer Res, 2019
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