<title>Distortion-invariant filters for foliage-penetration (FOPEN) synthetic aperture radar</title>

Abstract

New distortion-invariant filters are considered for object detection and clutter rejection in ultrawideband synthetic aperture radar (SAR) imagery. Because of the foliage penetration (FOPEN) ability of this SAR sensor, the data is attractive for automatic target recognition (ATR). We detail the first use of 2-D distortion-invariant filters for object detection in FOPEN data. Since FOPEN imagery of a particular target is dependent upon the foliage obscuring the object, we use filters designed using targets in an open area and test them on objects in foliage. Initial results indicate attractive distortioninvariant detection and low false alarm rates.