4D-OR: Semantic Scene Graphs for OR Domain Modeling

Crime Scene or Event Scene?

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On Support Relations and Semantic Scene Graphs

Rapid development of robots and autonomous vehicles requires semantic information about the surrounding scene to decide upon the correct action or to be able to complete particular tasks. Scene understanding provides the necessary semantic interpretation by semantic scene graphs. For this task, so-called support relationships which describe the contextual relations between parts of the scene su...

Unlocking the urban photographic record through 4D scene modeling

Discussion on ‘4D-Var or EnKF?’

The development of data assimilation techniques for numerical weather prediction has been very successful ever since the early 1950s until now, starting with simple two-dimensional and univariate spatial interpolation techniques like the successive corrections (SC, Bergthorsson and Döös, 1955) ending up with the four-dimensional variational data assimilation (4D-Var, Rabier et al., 2000) and en...

Lessons from scene graphs: using scene graphs to teach hierarchical modeling

The scene graph, as defined in VRML and Java3D, is a powerful tool for modeling a scene. The ideas contained in the scene graph are fundamental principles in modeling. They give beginning computer graphics students the tools to understand and apply the techniques of hierarchical modeling in scene design and can be directly applied to graphics programming in several graphics APIs, including Open...