Identification and tracking of moving objects in detected synthetic aperture imagery
First Claim
1. A method of identifying a moving object in a synthetic aperture radar (SAR) image of a region of interest, comprising:
- establishing a plurality of receive phase centers for a SAR image collector;
obtaining a SAR image using the plurality of receive phase centers; and
detecting in the SAR image a signature indicative of a moving object in the region of interest, wherein the signature indicative of a moving object in the SAR image is detected as a function of image collection time.
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Abstract
A method of tracking a moving object in an image created by use of a synthetic aperture includes identifying a plurality of receive phase centers for an image collector, obtaining a synthetic aperture image using the plurality of receive phase centers, and reading a signature of the moving object based on the synthetic aperture image, where the reading of the signature includes identifying, in the synthetic aperture image, as a function of image collection time, a presence of the moving object. The reading of the signature may also include identifying a changing position of the moving object, and may include associating a plurality of range difference values with respective ones of the plurality of phase centers. A signature of a scatterer may be formed using only its associated ΔR-versus-time profile. The presence of a mover in the image may be determined by filtering the image to detect all or part of a signature, or by using one or more signatures to train a neural network to observe the mover directly.
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Citations
49 Claims
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1. A method of identifying a moving object in a synthetic aperture radar (SAR) image of a region of interest, comprising:
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establishing a plurality of receive phase centers for a SAR image collector; obtaining a SAR image using the plurality of receive phase centers; and detecting in the SAR image a signature indicative of a moving object in the region of interest, wherein the signature indicative of a moving object in the SAR image is detected as a function of image collection time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A system for tracking a moving object in a synthetic aperture radar (SAR) image, comprising:
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apparatus for generating a SAR image using data collected through use of a plurality of receive phase centers; filtering apparatus for performing a least one filtering function to enhance detection of at least one image artifact in the SAR image generated as a result of use of the plurality of receive phase centers; and image analyzing apparatus to analyze the at least one image artifact in the SAR image to identify at least one signature of at least one mover object. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47)
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48. A method of enhancing information obtained from a synthetic aperture image, comprising:
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characterizing a selected part of the synthetic aperture image to obtain a unique signature of a low-intensity scatterer, the synthetic aperture image being obtained using multiple phase centers; and enhancing information related to said low-intensity scatterer based on the unique signature. - View Dependent Claims (49)
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Specification