EG2014 - Posters

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https://diglib.eg.org/handle/10.2312/7705

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Browsing EG2014 - Posters by Subject "I.3.7 [Computer Graphics]"

Now showing 1 - 4 of 4
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    Interactive Diffraction from Biological Nanostructures
    (The Eurographics Association, 2014) Dhillon, Daljit Singh; Teyssier, Jeremie; Single, Michael; Gaponenko, Iaroslav; Milinkovitch, Michel; Zwicker, Matthias; Mathias Paulin and Carsten Dachsbacher
    We describe a technique for interactive rendering of diffraction effects produced by biological nanostructures such as snake skin surface gratings. Our approach uses imagery from atomic force microscopy that accurately captures the nanostructures responsible for structural coloration, that is, coloration due to wave interference, in a variety of animals. We develop a rendering technique that constructs bidirectional reflection distribution functions (BRDFs) directly from the measured data and leverages precomputation to achieve interactive performance. We demonstrate results of our approach using various shapes of the surface grating nanostructures. Finally, we evaluate the accuracy of our precomputation-based technique and compare to a reference BRDF construction technique.
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    A Nonobscuring Eye Tracking Solution for Wide Field-of-View Head-mounted Displays
    (The Eurographics Association, 2014) Stengel, Michael; Grogorick, Steve; Rogge, Lorenz; Magnor, Marcus; Mathias Paulin and Carsten Dachsbacher
    We present a solution for integrating a binocular eye tracker into current state-of-the-art lens-based head-mounted displays (HMDs) without affecting the available field-of-view on the display. Estimating the relative eye gaze of the user opens the door for HMDs to a much wider spectrum of virtual reality applications and games. Further, we present a concept of a low-cost head-mounted display with eye tracking and discuss applications which strongly depend on or benefit from gaze estimation.
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    Skeleton-based Joints Position Detection
    (The Eurographics Association, 2014) Madaras, Martin; Piovarci, Michal; Kovacovský, Tomás; Mathias Paulin and Carsten Dachsbacher
    We present a system for detection of joint positions in scans of articulated models. Our method is based purely on skeletons extracted from scanned point clouds of input models. First, skeletons are extracted from scans and then an estimation of possible matches between skeletons is performed. The matches are evaluated and sorted out. The whole matching process is fully automatic, but some user-driven suggestions can be included. Finally, we pick the best matching of skeletons and create a union-skeleton containing all the nodes from all the skeletons. We find nodes in the union-skeleton with rotation changes higher than the predefined threshold. We take these nodes as joints and visualize them in original scans.
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    The Split Grid - A Hierarchical 1D-Grid-based Acceleration Data Structure for Ray Tracing
    (The Eurographics Association, 2014) Bauszat, Pablo; Kastner, Marc Aurel; Eisemann, Martin; Magnor, Marcus; Mathias Paulin and Carsten Dachsbacher
    We present a new acceleration structure for ray tracing called the Split Grid. Combining concepts of hierarchical grids, kd-trees and Bounding Volume Hierarchies (BVHs), our approach is based on the idea of nesting 1D-grids. Our proposed acceleration structure is compact in storage, adaptive to the scene geometry and can be traversed using a fast and efficient traversal scheme. We show that the Split Grid is comparable to other current state-of-theart acceleration structures regarding traversal performance and memory footprint. While other data structures usually achieve these levels of performance only due to a complex and expensive construction process (e.g. using the Surface Area Heuristic (SAH) [MB90]), our proposed Split Grid is built with a very simplistic construction scheme which is a major benefit of our approach.