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Isar target contour extraction method based on clean algorithm for scattering center extraction

A technology of target contour extraction and scattering center, applied in computing, computer parts, instruments, etc., can solve problems such as accuracy limitations, and achieve the effect of facilitating ISAR target classification and identification

Active Publication Date: 2019-05-21
XIDIAN UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to provide an ISAR target contour extraction method based on CLEAN algorithm scattering center extraction, which solves the problem that most of the existing contour extraction methods are based on morphological operations and their accuracy is limited

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  • Isar target contour extraction method based on clean algorithm for scattering center extraction
  • Isar target contour extraction method based on clean algorithm for scattering center extraction
  • Isar target contour extraction method based on clean algorithm for scattering center extraction

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Embodiment Construction

[0035] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0036] This paper proposes a new method of target contour extraction based on CLEAN and rubber band, and obtains focused ISAR images through translational compensation. Extract the 2D scattering center position of the target. Scattering center extraction methods have been mentioned in many literatures. In this paper, the CLEAN algorithm is used to obtain the scattering center position of the target from the two-dimensional ISAR. Using the α-shape method, the position of the scattering center at the boundary is obtained and connected into a closed curve. Here, using a new method called rubber band proposed in this paper, starting from the convex hull of scattered points, the closed contour line is obtained by pulling the rubber band. Finally, the feasibility and accuracy of this paper are verified by using the measured data.

[0037] Speci...

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Abstract

The invention discloses an ISAR target contour extraction method based on the CLEAN algorithm scattering center extraction. First step 1: using the two-dimensional CLEAN algorithm to extract the scattering center position information of the ISAR target, and reconstructing the ISAR image according to the extracted N strong scattering points Get the final high-resolution image, use α-shape to get the scattering center position on the edge of the target; connect these scattering centers into a closed curve through the rubber band method proposed in this paper, and smooth the result to obtain a smooth target outline Wire. The beneficial effect of the present invention is to apply the two-dimensional CLEAN high-resolution technology to the ISAR image contour extraction, connect the scattering centers at the edge of the target with a closed smooth curve to obtain the ISAR target contour extraction through the rubber band algorithm proposed herein, It is convenient for subsequent ISAR target classification and recognition.

Description

technical field [0001] The invention belongs to the technical field of radar imaging, and relates to an ISAR target contour extraction method based on the extraction of scattering centers of the CLEAN algorithm. Background technique [0002] Inverse synthetic aperture radar imaging is an effective means to obtain high-resolution images of moving targets, especially for radar target detection, recognition and classification. Inverse synthetic aperture radar (ISAR) imaging has important application value in target classification recognition and detection. In actual radar imaging, the target has both translation and rotation, and the translation movement causes the echoes of scattered points on the target to produce the same Doppler frequency shift, which is not helpful to imaging and must be compensated. The rotation is the basis of imaging, which makes the scattering points on the target with different azimuths produce different Doppler components, so the Doppler change info...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/46
CPCG06V10/44
Inventor 张民王欣聂丁赵佳张锐
Owner XIDIAN UNIV
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