Figure 1: Screenshots showing third party applications realized with X3DOM: Simulation of the planets and 100000 of the known 480000 asteroids of the Solar System (left), 3D visualization of social networks (middle), an animated WoW character with dynamic shadows (right). AbstractWe present a scalable architecture, which implements and further evolves the HTML/X3D integration model X3DOM introduced in [Behr et al. 2009]. The goal of this model is to integrate and update declarative X3D content directly in the HTML DOM tree. The model was previously presented in a very abstract and generic way by only suggesting implementation strategies. The available opensource x3dom.js architecture provides concrete solutions to the previously open points and extents the generic model if necessary. The outstanding feature of the architecture is to provide a single declarative interface to application developers and at the same time support of various backends through a powerful fallback-model. This fallback-model does not provide a single implementation strategy for the runtime and rendering module but supports different methods transparently. This includes native browser implementations and X3D-plugins as well as a WebGL-based scene-graph, which allows running the content without the need for installing additional plugins on all browsers that support WebGL. The paper furthermore discusses generic aspects of the architecture like encoding and introspection, but also provides details concerning two backends. It shows how the system interfaces with X3D-plugins and WebGL and also discusses implementation specific features and limitations.
In this paper we are presenting Cultural Heritage Layers, an approach that enables the visualization of historic media like drawings, paintings and photographs of buildings and historic scenes seamlessly superimposed on reality via video see through using X3D. This enables simple, inexpensive and sustainable Augmented Reality applications in the cultural heritage and architectural area based on industry standards.The main idea is to use existing historic media from archives and superimpose them seamlessly on reality at the right spot. These locative layers are context sensitively telling the location's history and create the impression of a virtual time journey.The registration of the virtual objects in the video images is provided by a robust 6DOF tracking framework based on two technologies that work in tandem: an initialization step based on Randomized Trees and a frame-to-frame tracking phase based on KLT.The entire application runs in real time on current Ultra Mobile PCs and MIDs.
The previous publications on X3DOM focused on the general integration model [Behr et al. 2009] and implementation strategies [Behr et al. 2010]. The aspects of dynamic and interactive worlds were an essential part, but not specifically addressed as such. The recent major additions to the system are CSS Animations and CSS 3D-Transforms as well as various forms of events for user interaction and system monitoring, which complement the existing design to support a large number of interactive and dynamic use cases. This overall design, including scene update mechanisms, animations, and a large number of DOM-based events are thus presented in this paper as part of a single overall system design
We present a method for noise reduction that is especially tailored to interactive progressive path tracing (PT). The idea is to exploit spatial coherence in the image and reuse information from neighboring pixels
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