Ultra wideband (UWB) radar is considered a promising technology to complement existing camera-based surveillance systems because, unlike cameras, it provides excellent range resolution. Many of the UWB radar imaging algorithms are based on large-scale antenna arrays that are not necessarily practical because of their complexity and high cost. To resolve this issue, we previously developed a two-dimensional radar imaging algorithm that estimates unknown target shapes and motion using only three antennas. In this paper, we extend this method to obtain three-dimensional images by estimating threedimensional motions from the outputs of five antennas. Numerical simulations confirm that the proposed method can estimate accurately the target shape under various conditions.
Remote control using video system is needed in a variety of fields. The performance of remote control using the conventional video system is very poor, compared with the work done by actual on-the-spot observation. We have developed a new Q stereoscopic video system, considering that one of the causes of such poor performance is in the visual interface used in the current teleoperator. This system realizes simultaneously both high resolution and wide visual field by fixed angle lens. Three experiments were implemented for visual interface, using the new system. The availabilities of central high resolution and peripheral wide angle images were studied in Experiment 1 and 2. The availabilities of both images were confirmed. In Experiment 3 the overlap ratio of right and left images in the Q stereoscopic video system was researched and it was clarified that the decrease of the overlap ratio lowered the performance. In this paper is preferable visual interface for the stereoscopic video system for remote control was investigated, and it was shown that the Q stereoscopic video system was preferable for remote control.
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