EG 2013 - Posters

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

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Browsing EG 2013 - Posters by Title

Now showing 1 - 12 of 12
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    Automatic Convergence Adjustment for Stereoscopy using Eye Tracking
    (The Eurographics Association, 2013) Fisker, Martin; Gram, Kristoffer; Thomsen, Kasper Kronborg; Vasilarou, Dimitra; Kraus, Martin; Miguel Chover and A. Augusto de Sousa
    When using stereoscopic displays, decoupling between convergence and accommodation can cause eyestrain. This paper proposes an adjustment method to automatically fit convergence at user fixation depth to accommodation by using eye tracking. Two different adjustment methods are proposed: one binocular, adjusting the images for both eyes, and one monocular, which adjusts only the image for the non-dominant eye. Preliminary results suggest better user comfort and a preference for binocular adjustment in high adjustment scenarios, while the adjustment is less noticeable with the monocular system.
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    A Distributed and Collaborative vSLAM Framework for Real-Time Localisation in Huge Environments for Mobile Devices
    (The Eurographics Association, 2013) Barrena, Nagore; Sánchez, Jairo R.; García-Alonso, Alejandro; Miguel Chover and A. Augusto de Sousa
    This poster proposes a collaborative vSLAM system for mobile Augmented Reality applications in huge environments. The system combines the efficiency of local vSLAM methods with the accuracy of large-scale mapping techniques. In order to overcome the efficiency problems of large-scale algorithms,a distributed architecture in the Cloud that keeps the consistency of the map is proposed. To achieve it, the data coming from multi-user local vSLAM algorithms is fused with the large-scale map stored in the Cloud.
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    Multi-Camera Acquisition and Placement Strategy for Displaying High-Resolution Images for Telepresence Systems
    (The Eurographics Association, 2013) Islam, Tariqul; Ohl, Stephan; Staadt, Oliver; Miguel Chover and A. Augusto de Sousa
    Life-size high-resolution telepresence systems, used for remote collaboration, face the problem of transmitting huge data from multiple viewpoints. We present different strategies focusing on efficient camera selection and acquisition method to discard part of image data for transmission as a preprocess to classical video compression schemes. At the the receiver site, part of the omitted data can be restored by means of super-resolution methods.
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    On Depth-testing Wide Outlines
    (The Eurographics Association, 2013) Szécsi, László; Hajagos, Balázs; Umenhoffer, Tamás; Miguel Chover and A. Augusto de Sousa
    We investigate the visibility problem of crease outlines in stylistic and engineering rendering. We discuss why the problem is ill-defined, and offer two different, consistent formulations that lead to artistic and technical drawing styles. We propose real-time, flicker-free GPU algorithms for both problems.
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    Poisson Image Analogy: Texture-Aware Seamless Cloning
    (The Eurographics Association, 2013) Yoshizawa, Shin; Yokota, Hideo; Miguel Chover and A. Augusto de Sousa
    Synthesizing two images with seamless boundaries, i.e. seamless image cloning, is important and has many useful applications in CG. Previous approaches do not produce realistic results if texture details of the two images are different.We propose a novel texture-aware seamless cloning framework based on separately processing the details and base image colors. The proposed framework provides realistic cloning results with seamless texture details.
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    Real-time Control and Stopping of Fluids
    (The Eurographics Association, 2013) Zsolnai, Károly; Szirmay-Kalos, László; Miguel Chover and A. Augusto de Sousa
    In this paper we address the fluid control problem, where an arbitrary density distribution (a shape of any kind) is given, and forces are exerted to get the fluid to flow into this shape and stop when the target distribution is reached. We present a real-time solution.
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    Reverse Skew-T - A Cloudmaking Tool for CG
    (The Eurographics Association, 2013) McLoughlin, Leigh; Anderson, Eike Falk; Miguel Chover and A. Augusto de Sousa
    We present 'Reverse Skew-T', a tool that allows users to direct a physically inspired simulation of layered clouds. To achieve this, we extend existing models for cloud simulation and provide a graphical user interface for providing important simulation parameters to our system.
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    A Sensor Based Approach to Outdoor Illumination Estimation for Augmented Reality Applications on Mobile Devices
    (The Eurographics Association, 2013) Barreira, JoĂŁo; MagalhĂŁes, LuĂ­s; Bessa, Maximino; Miguel Chover and A. Augusto de Sousa
    Realistic Augmented Reality applications require integrating virtual objects in the real world in a seamless visual way. The main problem to obtain a perfect visual augmentation is rendering the virtual objects with consistent illumination. In this paper, we present a novel approach to estimate outdoor illumination for Augmented Reality applications on mobile devices based on information acquired from sensors. We use an ambient light sensor to automatically detect in real-time the scene illuminance, which is used to simulate the actual lighting conditions. As outdoor illumination is mostly dependent on the weather, we derived the sky/sun illumination parameters from the light sensor data based on the IESNA sky model. The sunlight direction is estimated based on information from the GPS, date and time of the day. The result is a practical solution for outdoor illumination estimation handling light changes under natural conditions and applying them to the rendering of virtual objects in the real scene.
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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.
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    Volume Ray Casting quality estimation in terms of Peak Signal-to-Noise Ratio
    (The Eurographics Association, 2013) Gavrilov, Nikolay; Turlapov, V.; Miguel Chover and A. Augusto de Sousa
    In spite of a large number of techniques aimed for improvement of Direct Volume Rendering (DVR) quality and performance proposed in the literature, there is a lack of approaches for numerical quality estimation of the images obtained by visualization of medical and scientific volumetric datasets. In this paper we propose a method to estimate sampling artefacts. Using the proposed estimation method we compare different RC algorithms to expose optimal ones in quality-performance criteria.