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In order to improve the method of training the commander, the aerial instructor, back parachute commander, the guarantee unit and the aerial broadcaster, in this paper, we used Vega, Creator, and RTI implement the Parachute Jump Commanding And Simulation System to simulate the parachute jump commanding process. In this system, firstly, we used Creator build the 3D models that we need in the system;...
To acquire information of the invisible underground infrastructure, non-destructive subsurface imaging technologies are generally utilized. In construction, the recorded data of as-built pile excavation is archived in Koden test result sheets. The test result is in the form of literal document and identified by the pile numbering. The graphical presentation of the test result may provide a clearer...
3D models of building components or construction resources have been largely created by computer-aided-design (CAD) or by proprietary code for virtual reality development. Such 3D modeling methods entail accurate definition of points, lines and their relationships in the spatial coordinate system. Unlike CAD modeling, the surveying technique of photogrammetry takes a completely different approach...
Recent developments in techniques for modeling, digitizing and visualizing 3D shapes have led to an explosion in the number of available 3D models on the Internet and in domain-specific databases. However, how to describe 3D shape is a difficult problem. A new 3D shape description method based on rotation is proposed in this paper. The first step is to sample points on the surface and compute normal...
Most of the researchers on watermarking techniques have focused on protecting the copyright information in various data such as audio, image and video signals. However, relatively less watermarking techniques are in respect of copyright protection of 3D model objects. After analyzing the data structure of 3D models, we propose a novel and efficient algorithm which allows embedding public watermarks...
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