1,720,966 research outputs found
The Viper Algorithm: A New Approach for Detection Using 2D-Adaptive Sampling
No full textThis paper describes a new technique of irregular and adaptive sampling developed to process still images con- taining objects of interest over a non interesting back- ground. The method allows the identication of inter- esting elements and is able to choose the sampling in- terval more adequate to obtain a correct description of them. The not interesting background is roughly sam- pled and this particular aspect of the method is an im- portant advantage. Objects are rst detected by a pre- liminary sampling phase and then a resampling process begins, until a convergence test in the Fourier domain is satised and stops the process. Examples of applica- tions are give
Object Detection Using a Novel 2D-Adaptive Sampling Strategy
No full textThis paper describes a novel algorithm especially devoted to detect "interesting" objects defined as a set of close measured values that spring out from a uniform or textured background. In particular such an algorithm has been developed with the purpose to define a movement strategy for a remotely piloted rover useful in applied geophysics. The method could be represented by a Viper that moves with a random trial over the image with the purpose to detect the presence of an object emerging from the background, and to adapt the sampling interval to the shape of the detected object. Simulations on real geophysics images show good results with reduced algorithm complexity
A Selective Compression Algorithm for SAR Images Based on Irregular and Adaptive Sampling
No full textDeals with the topic of selective compression of SAR images. A novel algorithm based on the use of irregular and adaptive sampling is presented: good compression ratios can be achieved selecting the regions of interest (ROI) within the image in order to represent them with an adequate set of samples, while the textured or uniform background is roughly sampled. The method presented has been tested on several SAR images obtaining very good performance. An example of an application is given in this pape
Irregular and Adaptive Sampling for Automatic Geophysics Measurement Systems
No full textIn this paper a sampling method, based on an irregular and adaptive strategy, is described. It can be used as automatic guide for rovers designed to explore terrestrial and planetary environments. Starting from the hypothesis that a explorative vehicle is equipped with a payload able to acquire measurements of interesting quantities, the method is able to detect objects of interest from measured points and to realize an adaptive sampling, while badly describing the not interesting background
Definizione dell'architettura di un ricevitore ibrido riconfigurabile per applicazioni di tipo NAV/COM
No full text
Wireless Networks Based on High Altitude Platforms for the Provision of Integrated Navigation/Communication Services
No full textREGAL: a Reconfigurable Receiver for GPS and Galileo
No full textIn this paper we described the software defined radio implementation of a receiver for GPS and Galileo system
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