Communications: directive radio wave systems and devices (e.g. – Synthetic aperture radar
Reexamination Certificate
2007-10-18
2010-11-09
Tarcza, Thomas H (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Synthetic aperture radar
C342S195000
Reexamination Certificate
active
07830300
ABSTRACT:
A detection system and method. The inventive system includes an arrangement for receiving a frame of image data; an arrangement for performing a rate of change of variance calculation with respect to at least one pixel in said frame of image data; and an arrangement for comparing said calculated rate of change of variance with a predetermined threshold to provide output data. In the illustrative embodiment, the frame of image data includes a range/Doppler matrix of N down range samples and M cross range samples. In this embodiment, the arrangement for performing a rate of change of variance calculation includes an arrangement for calculating a rate of change of variance over an N×M window within the range/Doppler matrix. The arrangement for performing a rate of change of variance calculation includes an arrangement for identifying a change in a standard deviation of a small, localized sampling of cells. In accordance with the invention, the arrangement for performing a rate of change of variance calculation outputs a rate of change of variance pixel map.
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Ashcraft Ivan
Bruyere Donald
Treece John
Galt Cassi
Horn, Esq. John
Raytheon Company
Tarcza Thomas H
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