Florian Kirsch

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This paper presents an illustrative visualization technique that provides expressive representations of large-scale 3D city models, inspired by the tradition of artistic and cartographic visualizations typically found in bird's-eye view and panoramic maps. We define a collection of city model components and a real-time multi-pass rendering algorithm that(More)
Image-based CSG rendering algorithms for standard graphics hardware rely on multipass rendering that includes reading and writing large amounts of pixel data from and to the frame buffer. Since the performance of this data path has hardly improved over the last years, we describe new implementation techniques that efficiently use modern graphics hardware.(More)
We present the design and implementation of a real-time 3D graphics library for image-based Constructive Solid Geometry (CSG). This major approach of 3D modeling has not been supported by real-time computer graphics until recently. We explain two essential image-based CSG rendering algorithms, and we introduce an API that provides a compact access to their(More)
For the interactive construction of CSG models understanding the layout of the models is essential to ease their efficient manipulation. To comprehend position and orientation of the aggregated components of a CSG model, we need to realize its visible and occluded parts as a whole. Hence, transparency and enhanced outlines are key techniques to communicate(More)
Illustrating in a sketchy manner is essential to communicate visual ideas and can be used to present and reconsider drafts and concepts in product design. This paper introduces a real-time illustration technique that sketches the design and spatial assembly of CSG models. The illustration technique generates a graphical decomposition of the CSG model into(More)
The different methods to process phase measurement data of a MFCW ranging system with their characteristics are well suited to be used for UHF RFID ranging. Our measurements show that ranging ISO 18000-6C UHF RFID tags under FCC regulations is possible in outdoor conditions despite the limited bandwidth. Our next steps will be to further compare the(More)
Given the narrow bandwidth of UHF-RFID it is not possible to separate the different signal paths apart. In this paper the SNR was derived, necessary for any nonlinear super-resolution algorithms. As long as these SNR levels are not met, any evaluation method will give a weighted mean of all the individual paths that exist in the perceived channel.(More)
An algorithm for AoA estimation of UHF RFID tags, based on an acceleration defined synthetic aperture is derived with the aid of the Principal Component Analysis. It gives an analytical solution for the tag direction and requires significantly less computational effort than comparable algorithms while performing nearly as good as the benchmark algorithm.(More)