Bbn Technologies Corporation

Christopher S Fortin

David Bruce Cousins

Kenneth J McPhillips

Paul Patrick Audi

Kevin Paul Bongiovanni

A network tap [] monitors traffic transmissions in a network []. The tap records transmission time information [] between data transmitted in the network. From the transmission time information, the tap calculates differences in transmission times [], and assumes the differences in transmission times are distributed as fractional gaussian noise. Housdorff dimensions are calculated for the fractional gaussian noise distributions. The Housdorff dimensions are used to generate traffic analysis information for the network, even when the data transmitted on the network is encrypted.

Fractal dimension analysis for data stream isolation

A system and method can detect and track targets in a scene of interest. Interframe differencing can be performed on sequential pairs of images of the scene and a Bayesian model analyzer can obtain an interframe difference density function. The interframe difference density function can be partitioned into static and mobile regimes to provide an objective function. A tracking module can construct a level set and geodesic active contours can be determined for the targets. An adaptive control can apply a spatial transformation and level set perturbation to the geodesic contours to oscillate the contours such that the level set can drop to a lower energy level. The expanded contour can be fed back for use in processing subsequent interframe differences. Target motion analysis data, such as bearing and bearing rate data, can be extracted from the geodesic active contours by applying geometric based transformations on the curve's coordinates.

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No. Kingston, RI, United States of America

Christopher S Fortin