VMV16

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https://diglib.eg.org/handle/10.2312/2630932

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Browsing VMV16 by Subject "Color"

Now showing 1 - 3 of 3
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    A Deferred Rendering Pipeline Including a Global Illumination Model for Atmospheric Scattering and Transparency
    (The Eurographics Association, 2016) Heppner, S.; Dransfeld, M.; Domik, G.; Oleg Lobachev
    Abstract This poster presents suitable global illumination models for atmospheric scattering in outdoor scenes combined with a deferred rendering pipeline which offers the possibility of rendering transparent objects. The use case is a HIL simulation for camera based ADAS tests that require a realistic rendering of outdoor scenes.
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    An Interactive Appearance Model for Microscopic Fiber Surfaces
    (The Eurographics Association, 2016) Velinov, Zdravko; Hullin, Matthias B.; Matthias Hullin and Marc Stamminger and Tino Weinkauf
    Modeling and rendering the appearance of fabrics remains one of the most challenging research topics in computer graphics. Today's most advanced models are based on volumetric fiber distributions, obtained from advanced measurement techniques like micro-CT, and only renderable through expensive volume rendering approaches. In this paper, we propose an analytical BRDF model for pile fabrics, i.e., textiles like velvet, plush or Alcantara, that are characterized by open-ended strands of yarn. A fascinating property of many such materials is that they ''memorize'' tactile interaction and that their appearance depends on the last direction in which the surface was brushed. Our reflectance model, inspired by recent microflake models, links the microscopic structure of a material to the interaction that caused that structure, and to the resulting macroscopic reflectance behavior. We present an end-to-end pipeline for fitting the parameters of our model to measured reflectance data, for manipulating fiber distributions using tactile input, and rendering the resulting spatially varying surface appearance in real time.
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    Reflection Separation in Light Fields based on Sparse Coding and Specular Flow
    (The Eurographics Association, 2016) Sulc, Antonin; Alperovich, Anna; Marniok, Nico; Goldluecke, Bastian; Matthias Hullin and Marc Stamminger and Tino Weinkauf
    We present a method to separate a dichromatic reflection component from diffuse object colors for the set of rays in a 4D light field such that the separation is consistent across all subaperture views. The separation model is based on explaining the observed light field as a sparse linear combination of a constant-color specular term and a small finite set of albedos. Consistency across the light field is achieved by embedding the ray-wise separation into a global optimization framework. On each individual epipolar plane image (EPI), the diffuse coefficients need to be constant along lines which are the projections of the same scene point, while the specular coefficient needs to be constant along the direction of the specular flow within the epipolar volume. We handle both constraints with depth-dependent anisotropic regularizers, and demonstrate promising performance on a number of real-world light fields captured with a Lytro Illum plenoptic camera.