Researchers have combined XML3D, which provides declarative, interactive 3D scene descriptions based on HTML5, with Xflow, a language for declarative, high-performance data processing. The result ...lets Web developers combine a 3D scene graph with data flows for dynamic meshes, animations, image processing, and postprocessing.
Composite lighting simulations with lighting networks Slusallek, Philipp; Stamminger, Marc; Heidrich, Wolfgang ...
ACM SIGGRAPH 97 Visual Proceedings: The art and interdisciplinary programs of SIGGRAPH '97,
01/1997
Conference Proceeding
Over the past few decades, advances in acquisition, modeling, and simulation technologies have resulted in databases of 3D models that seem to be unlimited in size and complexity. Highly detailed ...models are increasingly produced in areas such as industrial CAD for airplanes, ships, production plants, and buildings; geographic information systems; oil and gas exploration; medical imaging; scanned 3D models; unorganized information spaces; and high-end scientific simulations. Such models might contain millions or even billions of 3D primitives, such as triangles, point sets, surfaces, and voxels. The models often have additional, higher-dimensional attributes associated with the primitives. The Guest Editors of this Special Issue of IEEE Computer Graphics and Applications discuss the challenges that complex models present and how those articles represent and address some of those challenges.
Radiosity and relaxation methods Gortler, S.; Cohen, M.F.; Slusallek, P.
IEEE computer graphics and applications,
11/1994, Volume:
14, Issue:
6
Magazine Article
Peer reviewed
Open access
To date, there has been some confusion in the computer graphics community about how the progressive radiosity (PR) method relates to standard numerical methods for solving linear systems of ...equations. We show that PR is actually equivalent to the combination of two numerical analysis techniques known as Southwell relaxation and Jacobi iteration. A new overshooting method similar to over relaxation can accelerate the convergence of the iterative radiosity methods.< >
...the focusing property of a real convergent electron probe is captured in the aberration-corrected STEM. Figure 4 Fourier transform of a focal series. (a) The frequencies covered by one focal stack ...correspond to the shape of a double-wedge of opening semi-angle α. (b) If the tilt increment is chosen as Δβ = 2α, neighboring wedges overlap in a non-trivial shape (orange). (c) When considering a cross section through the origin and perpendicular to the tilt axis, the wedges seem to seamlessly cover the entire frequency space. (d) A cross section shifted along the tilt axis reveals a complex-shaped region in frequency space that contains information from more than one tilt direction. (e) A cross section further along the tilt axis toward highest frequencies exposes that the region containing information from both tilt directions expands toward higher frequencies. Conclusion For the imaging of thick samples of 0.5 µm or more, the HAADF-STEM mode is a powerful alternative to conventional TEM. Because aberration-corrected STEM images have a very limited DOF, tilt-series STEM tomography can be supplemented by depth sectioning. The authors acknowledge the electron microscopy supported by the Materials Sciences and Engineering Division, Basic Energy Sciences, Office of Science, U.S. Department of Energy (ARL), using instrumentation at the Oak Ridge National Laboratory’s Center for Nanophase Materials Sciences (CNMS), which is sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy, as well as the electron microscopy support provided by the Karlsruhe Nano Micro Facility (KNMF), a Helmholtz large-scale user facility operated at the Karlsruhe Institute of Technology (KIT).
Composite lighting simulations with lighting networks Slusallek, P.; Stamminger, M.; Heidrich, W. ...
IEEE computer graphics and applications,
1998-March-April, 1998-03-00, 19980301, Volume:
18, Issue:
2
Magazine Article
Peer reviewed
Lighting networks combine different global illumination algorithms in a composite lighting simulation and allow for restricting costly lighting effects to important parts of the scene. In the ...lighting networks approach, each lighting algorithm is considered a lighting operator or LightOp. Each LightOp takes illumination information as input and generates new illumination information as output after having simulated part of the global lighting effects in the scene. We motivate the use of LightOps from the formal solution of the radiance equation. We then demonstrate how these LightOps can easily combine into a lighting network, representing a composite lighting simulation.
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