Unsupervised ICA neural networks applied to the reticle based optical trackers (CROSBI ID 476851)
Prilog sa skupa u zborniku | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Kopriva, Ivica ; Szu, Harold ;
engleski
Unsupervised ICA neural networks applied to the reticle based optical trackers
Reticle systems are considered to be the classical approach for estimating the position of a target in a considered field of view and are widely used in IR seekers. Due to the simplicity and low cost, since only a few detectors are used, reticle seekers are still in use and are subject of further research. However, the major disadvantage of reticle trackers has been proven to be sensitivity on the IR countermeasures such as flares and jammers. When redesigned adequately they produce output signals that are linear convolutive combinations of the reticle transmission functions that are considered as the source signals in the context of the Independent Component Analysis (ICA) theory. Each function corresponds with single optical source position. That enables ICA neural network to be applied on the optical tracker output signals giving on its outputs recovered reticle transmission functions. Position of each optical source is obtained by applying appropriate demodulation method on the recovered source signals. The three conditions necessary for the ICA theory to work (statistical independence and non-Gaussianity of the source signals and nonsingularity of the mixing matrix) are shown to be fulfilled in principle for any kind of the reticle geometry.
optical trackers; independent component analysis; unsupervised neural networks
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Podaci o prilogu
150-164-x.
2000.
objavljeno
Podaci o matičnoj publikaciji
Proceedings of SPIE - Wavelet Applications VII
Szu, Harold ; Vetterli, Martin ; Campbell, William ; Buss, James ;
Bellingham (WA): SPIE
Podaci o skupu
AeroSense - Annual International Symposium in Aerospace/Defence Sensing, Simulation, and Controls
pozvano predavanje
16.04.2000-20.04.2000
Orlando (FL), Sjedinjene Američke Države