EG 2013 - Posters

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https://diglib.eg.org/handle/10.2312/303

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Browsing EG 2013 - Posters by Subject "Dimensional Graphics and Realism"

Now showing 1 - 3 of 3
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    Time-variant Volumetric Colors for Metamorphosis
    (The Eurographics Association, 2013) Fryazinov, Oleg; Sanchez, Mathieu; Adzhiev, Valery; Pasko, Alexander; Miguel Chover and A. Augusto de Sousa
    We propose to treat any changes in colors and textures in shape metamorphosis between two objects as time- dependent transformations of the volumetric distribution of materials. The main idea is to represent geometry of both objects with scalar fields with distance properties, to leave a time gap in where the geometric metamorphosis happens, and to use the scalar fields to apply shape-driven interpolation to volumetric material attributes within this time gap. The proposed solution is analytical, does not require heavy numerical computations essential to fluid simulations, and can be implemented in real-time applications.
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    Towards a Physically Plausible Constrained Shader Graph System for Predictive Rendering
    (The Eurographics Association, 2013) PavlĂ­k, Ivo; Wilkie, Alexander; Miguel Chover and A. Augusto de Sousa
    We present ongoing work on a modeling tool for Predictive Rendering based on the popular idea of shader graphs for description of object surfaces. To guarantee physical plausibility of the resulting materials, we use a restricted approach that only allows us to build the shader graphs by using physically safe surface models and physically safe manipulation operators. The tool also allows us to manipulate material properties - fluorescence and polarisation - which can affect object appearance, but are usually missing in other modeling toolsets. Since there is a rising demand for realism of the modelled material appearance among CG content creators, the concept of a restricted shader graph is also useful in the context of common photorealistic renderers.
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    Using Webcams for Product Presentations in HTML5
    (The Eurographics Association, 2013) Borg, Mathias; Kraus, Martin; Miguel Chover and A. Augusto de Sousa
    The Media Capture and Streams API ("getUserMedia API") enables plug-in free webcam support in HTML5. This opens new ways of interacting with visualisations using open web standards. In this work, two techniques are proposed that employ the user's webcam for interactive product presentations on websites. The first technique tracks the user's face and uses its position to create the impression of a user-controlled rotation of a product by displaying a sequence of product images for different view points. The second technique uses photographs of a product with reflections of coloured patterns to render the user's webcam stream as a reflection in the product presentation. Thus, users in front of a webcam are able to see their virtual reflection in a picture of a real product in real time. Our implementation of two prototypes shows that it is technically possible to implement these features with HTML5 and JavaScript only.