Communications: directive radio wave systems and devices (e.g. – With particular circuit – Display
Reexamination Certificate
2007-10-18
2011-11-08
Gregory, Bernarr (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
With particular circuit
Display
C342S02500R, C342S02500R, C342S089000, C342S091000, C342S093000, C342S175000, C342S176000, C342S195000
Reexamination Certificate
active
08054217
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 S.
Bruyere Donald P.
Treece John B.
Gorrie Gregory J.
Gregory Bernarr
Raytheon Company
Schwegman, Lundberg & Woesnner, P.A.
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