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Radio frequency fingerprinting (RFF) is used to uniquely identify individual radios. This paper investigates the sources of RF fingerprints and proposes a RFF approach based on the constellation errors. The transmitter imperfections and their effect on constellations are explored, from which the conclusion is made that the constellation errors contains transmitter identity information. Then a machine-learning...
This paper presents a robust multi-view vehicle detection based on the Histogram of Oriented Gradient (HOG)-Histograms of Census Transform (HCT) features and the mixtures of deformable part models. As some virtual features of vehicle in single view, such as headlight, taillight and edges can not been directly used, we develop a new HOG-HCT feature to describe the vehicle structure feature in multi-view...
While The nonlocal(NL)-means filter introduced by Buades et al. have speedily entered the hall of fame of denoising methods, its computational complexity is quite a burden, we propose a newly automatical and efficient preselection-based NL-means filter, using the 2DPCA technique. Mainly, our contributions to the NL-means filter are: 1) a preselection of the most relevant pixels using the 2DPCA technique;...
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