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Unsupervised segmentation and contour detection remains a challenging task. In graph-based unsupervised segmentation, the formulation of the affinity graph is pivotal to segmentation performance. Conventional graph-based approaches often only define pixels as graph nodes, and may overlook important regional information. In this paper, we propose a novel scheme for affinity graph construction, where...
Accurate liver segmentation from computed tomography (CT) images is problematic due to non-uniform density, weak boundaries and because there may be multiple liver tumors that have heterogeneous intensities in region(s) of interest (ROIs). So we propose a generalized energy framework that harnesses the statistical intensity approximation with image data on graphs. Our statistical energy term takes...
Based on the existing IR-UWB indoor-positioning receiving system[1], a novel charge-pump PLL receiving system with AGC is proposed to accurately estimate UWB pulse arrival time, and achieve the goal of accurate indoor ranging and positioning. Pulse rising-edge detection??APulse-broadening circuit is mainly discussed, and some new phenomena are analyzed, which can be used for narrow pulse detection...
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