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A routing graph allows to find paths in buildings quickly. Raster images of floor plans are simple to obtain but display poor performance. A manually constructed graph is quite optimal if designed by an informed person, but the process is time consuming and expensive. We describe a fast method to calculate a 2D routing graph from raster images. We adapt image processing techniques and apply a conditional...
As the research in indoor localization moves on, more and more algorithms and systems are proposed by academia as well as industry. However, most approaches are evaluated in simulation or small experiments. The results are often hard to compare as assumptions differ between all settings and the setups vary from lab conditions to real life scenarios. As one of the biggest problems of range based indoor...
We introduce the Membership Degree Min-Max (MD-Min-Max) localization algorithm as a precise and simple lateration algorithm for indoor localization. MD-Min-Max is based on the well known Min-Max algorithm that uses a bounding box to compute the position. We present an analysis of the Min-Max algorithm and show strengths and weaknesses in the spatial distribution of the position error. MD-Min-Max uses...
We introduce a simulation engine to visually evaluate and compare distance based lateration algorithms and deployments called the FU Berlin Parallel Lateration-Algorithm Simulation and Visualization Engine (LS2). Our engine simulates a scenario which consists of given anchor positions and evaluates all positions of a playing field in parallel, instead of only randomly selected positions. At the end...
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