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Target feature extraction method for one-dimensional imaging of target by using broadband radar

A target and algorithm technology, applied in the field of comprehensive target recognition, can solve problems such as unstable target characteristics, and achieve the effect of improving adaptability

Inactive Publication Date: 2012-10-10
THE 724TH RES INST OF CHINA SHIPBUILDING IND
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Problems solved by technology

[0002] At present, in the technical research and equipment development in the field of comprehensive target recognition, the broadband radar method is mainly used to obtain more electromagnetic scattering characteristics of the target's shape. Due to the influence of sea clutter and other reasons, there are target features Instability and other issues

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  • Target feature extraction method for one-dimensional imaging of target by using broadband radar
  • Target feature extraction method for one-dimensional imaging of target by using broadband radar

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Embodiment Construction

[0022] Implementation process and software flow such as figure 1 As shown, the specific description is the following process:

[0023] The preprocessing process of S1 target one-dimensional imaging data is divided into the following steps:

[0024] 1) By detecting whether there are a large number of continuous 0s in the target, the correctness of the data is judged;

[0025] 2) Determine whether there are outliers in the imaging data of the same period of the target. The specific method is that the maximum value of the three samplings at the unified sampling point position cannot be greater than 5 times the median value;

[0026] 3) Filter overlong targets (ground objects and other conditions) through coarse thresholds, and select reasonable air-sea targets.

[0027] The S2 broadband imaging target detection process is divided into the following steps:

[0028] 1) By detecting the left and right sides of the wave gate, determine the strongest amplitude of the sea clutter, a...

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Abstract

The invention relates to a target feature extraction method for one-dimensional imaging of a target by using a broadband radar. The target feature extraction method is used for solving the problems that the target features of a sea target are easily unstable under the influence of sea clutters when the sea target is subjected to broadband imaging, and the like, caused by the fact that the current broadband radar one-dimensional imaging method for the target mainly acquires the electromagnetic scattering characteristics of the external shape of the target. In order to obtain more stable identification results, a one-dimensional high-resolution distance feature extraction algorithm is provided by the technical scheme adopted by the invention, so that the accurate extraction of one-dimensional image features is realized, the discrimination and identification of one-dimensional broadband images of the sea target are realized. The target feature extraction method comprises the following specific steps of: judging the correctness of one-dimensional imaging data of the target so as to eliminate singular values which affect data computed results; accurately judging imaging starting and ending positions of the target so as to provide a basis for the judgment of target size and a support for back-end processing; and carrying out extraction and computation on numerical features of the target. The target feature extraction method provided by the invention has the advantages that the difficult problem in extraction of identification features of the target is solved, and a technical support for identification of broadband images of the target is provided.

Description

A technical field [0001] The invention relates to a target feature extraction algorithm for one-dimensional imaging of targets by wideband radar, which belongs to the technical field of comprehensive target recognition. The feature extraction is performed on one-dimensional wideband imaging of targets to facilitate comparison and identification, which is very important in military affairs Value. Two background technology [0002] At present, in the technical research and equipment development in the field of comprehensive target recognition, the broadband radar method is mainly used to obtain more electromagnetic scattering characteristics of the target's shape. Due to the influence of sea clutter and other reasons, there are target features Instability and other issues. [0003] In order to obtain a relatively stable recognition result, the invention of this technology proposes a one-dimensional high-resolution distance feature extraction algorithm to realize one-dimension...

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Application Information

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IPC IPC(8): G01S13/89
Inventor 管志强钱坤
Owner THE 724TH RES INST OF CHINA SHIPBUILDING IND
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