RADAR IMAGE PROCESSING
First Claim
1. A method for processing a radar image, the method comprising:
- using a radar, generating a radar image of an area of terrain, the radar image deriving from radar observations taken along a plurality of azimuth angles;
performing a background extraction process on the radar image to extract a background image comprising extracted radar observations, the background extraction process comprising estimating a range spread of a radar echo from the surface of the terrain as function of the azimuth angle and a tilt of the radar relative to the surface of the terrain;
fitting a model to the extracted radar observations along a particular azimuth angle;
determining a value of a parameter indicative of the goodness of fit between the model and the extracted radar observations along the particular azimuth angle; and
determining a classification depending on the value of the parameter for that azimuth angle.
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Accused Products
Abstract
Apparatus and a method for processing a radar image, the method comprising: using a radar, generating a radar image of an area of terrain (8), the radar image deriving from radar observations taken along a plurality of azimuth angles; performing a background extraction process on the radar image to extract a background image comprising extracted radar observations, the background extraction process comprising estimating a range spread of a radar echo from the surface of the terrain (8) as function of the azimuth angle and a tilt of the radar relative to the surface of the terrain (8); fitting a model to the extracted radar observations along a particular azimuth angle; determining a value of a parameter indicative of the goodness of fit between the model and the extracted radar observations along the particular azimuth angle; and determining a classification depending on the value of the parameter for that azimuth angle.
27 Citations
15 Claims
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1. A method for processing a radar image, the method comprising:
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using a radar, generating a radar image of an area of terrain, the radar image deriving from radar observations taken along a plurality of azimuth angles; performing a background extraction process on the radar image to extract a background image comprising extracted radar observations, the background extraction process comprising estimating a range spread of a radar echo from the surface of the terrain as function of the azimuth angle and a tilt of the radar relative to the surface of the terrain; fitting a model to the extracted radar observations along a particular azimuth angle; determining a value of a parameter indicative of the goodness of fit between the model and the extracted radar observations along the particular azimuth angle; and determining a classification depending on the value of the parameter for that azimuth angle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15)
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13. Apparatus for processing a radar image, the apparatus comprising:
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a radar arranged to generate a radar image of an area of terrain, the radar image deriving from radar observations taken along a plurality of azimuth angles; and one or more processors arranged to; perform a background extraction process on the radar image to extract a background image comprising extracted radar observations, the background extraction process comprising estimating a range spread of a radar echo from the surface of the terrain as function of the azimuth angle and a tilt of the radar relative to the surface of the terrain; fit a model to the extracted radar observations along a particular azimuth angle; determine a value of a parameter indicative of the goodness of fit between the model and the extracted radar observations along the particular azimuth angle; and determine a classification depending on the value of the parameter for that azimuth angle.
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Specification