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AssigneeQinetiq Limited
InventorsMohammed Jahangir, Paul Graham Kealey, Christopher Paul Moate, Robert David Hill
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The present invention relates to a system and method for processing imagery, such as may be derived from a coherent imaging system e.g. a synthetic aperture radar (SAR). The system processes sequences of SAR images of a region taken in at least two different passes and generates Coherent Change Detection (CCD) base images from corresponding images of each pass. A reference image is formed from one or more of the CCD base images images, and an incoherent change detection image formed by comparison between a given CCD base image and the reference image. The technique is able to detect targets from tracks left in soft ground, or from shadow areas caused by vehicles, and so does not rely on a reflection directly from the target itself. The technique may be implemented on data recorded in real time, or may be done in post-processing on a suitable computer system.
A method of detecting movement parameters of a ground based target by processing first and a second temporal sequences of returns from a Synthetic Aperture system, each sequence collected during separate imaging passes, the returns comprising a plurality of synthetic aperture base images of a region comprising the steps of:
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A processing system for the detection of movement parameters of a target, the processing system processing returns from a Synthetic Aperture system, comprising a processor adapted to receive data from the synthetic aperture system, the data comprising image information from two independent imaging passes of the same scene, the image information comprising a plurality of synthetic aperture images from each pass of the scene, the processing system comprising a processor adapted to process the data in the form of synthetic aperture images from the two independent imaging passes and, pairing primary and repeat pass images for the same geometries, to produce a coherent change detection (CCD) image for each pairing, so generating a plurality of CCD base images;
A processing system as claimed in 23 wherein the processing system is adapted to obtained focused images based upon a shadow of a moving target.
Dependencies are inferred from the claim text.