Point and line target identification and image enhancement method based on distributed SAR image

A distributed, point target technology, used in radio wave measurement systems, radio wave reflection/re-radiation, instruments, etc., and can solve problems such as difficulty in distinguishing point and line targets

Active Publication Date: 2020-05-22
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0004] In view of this, in order to solve the problem that the line target degenerates into a point target in the SAR image of complex scenes, which makes it difficult to distinguish between point and line targets, a method for point and line target recognition and image enhancement based on distributed SAR images is proposed.

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  • Point and line target identification and image enhancement method based on distributed SAR image
  • Point and line target identification and image enhancement method based on distributed SAR image
  • Point and line target identification and image enhancement method based on distributed SAR image

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Embodiment Construction

[0030] The present invention provides a point and line target recognition and image enhancement method based on distributed SAR images, using radar echo data under dual viewing angles for imaging to obtain a dual-angle SAR image; extracting a set of point targets from the dual-angle SAR image; Using the phase information of the point target, the point target is distinguished as the end point of the line target or the point target; the line target formed by the end points of the line target is determined, and finally the line target is reconstructed in the radar echo. It can be seen that the present invention utilizes the target phase information to divide the end point of the line target and the point target, thereby identifying the line target that degenerates into a point target, and finally realizing the reconstruction of the line target. The invention solves the problem that the line target degenerates into a point target in the SAR image of the complicated scene, which mak...

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Abstract

The invention discloses a point and line target identification and image enhancement method based on a distributed SAR image. The method comprises the steps of: carrying out imaging through radar echodata under double visual angles to obtain a double-angle SAR image; extracting a point target set from the double-angle SAR image; distinguishing the point targets as line target end points or pointtargets by utilizing the phase information of the point targets; and determining a line target formed by the line target end points, and reconstructing the line target in the radar echo. According tothe method, the problem that point targets and line targets are difficult to distinguish due to the fact that the line targets in SAR images in complex scenes are degraded into point targets can be solved.

Description

technical field [0001] The invention belongs to the technical field of synthetic aperture radar, in particular to a point and line target recognition and image enhancement method based on distributed synthetic aperture radar (SAR) images. Background technique [0002] Synthetic aperture radar is an all-weather, all-weather high-resolution microwave remote sensing imaging radar, which has been widely used in environmental monitoring, ocean observation, resource exploration, crop yield estimation, surveying and mapping, and military fields. play a role. [0003] The traditional SAR two-dimensional imaging algorithm can perform two-dimensional high-resolution imaging of the observation area on the azimuth and slant distance planes. The high resolution of the range upward is achieved by transmitting a linear frequency modulation signal with a large time-width-bandwidth product combined with pulse compression. Its high resolution in azimuth is achieved by forming a virtual synth...

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Application Information

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IPC IPC(8): G01S13/90G01S7/41
CPCG01S13/90G01S7/41G01S13/9058
Inventor 丁泽刚陈新亮王岩温育涵曾涛赵良波张弛
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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