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Moving target tracking method based on video SAR cross-domain combination

A moving target and video technology, applied in the field of radar, can solve the problems of missed detection, false alarm, unable to form an effective track, etc., to achieve the effect of low missed detection rate, high detection accuracy, and overcoming unstable detection.

Active Publication Date: 2021-01-05
XIDIAN UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to address the above-mentioned deficiencies in the prior art, and propose a moving target tracking method based on video SAR cross-domain joint, which is used to solve the false alarm and missing caused by single-domain detection due to the influence of system parameters and moving state of the moving target. check, and the problem of not being able to form a valid track

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  • Moving target tracking method based on video SAR cross-domain combination
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  • Moving target tracking method based on video SAR cross-domain combination

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[0035] The embodiments and effects of the present invention will be further described below in conjunction with the accompanying drawings.

[0036] refer to figure 1 , to further describe the implementation steps of the present invention.

[0037] Step 1, perform rough detection on the moving target shadow in the image domain.

[0038] Step 1, registration and denoising processing of video SAR image sequence: use SAR-SIFT algorithm to register the video SAR image sequence within one second, and perform PM filter denoising processing on the registered video SAR image sequence :

[0039]The number of selected frames is determined by the video SAR frame rate and detection requirements. Too few frames cannot effectively extract the background and affect the extraction of shadows of moving objects. Too many frames will increase the amount of computation and detection delay. We firstly match the images through the SIFT algorithm, and then use the RANSAC algorithm to further impro...

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Abstract

The invention discloses a moving target tracking method based on video SAR cross-domain combination. The implementation scheme is as follows: 1) performing coarse detection on a moving target shadow by utilizing background difference in an image domain; 2) carrying out range walk correction in a range Doppler domain by utilizing Keystone transform, and carrying out coarse detection on echo energyof a moving target by utilizing improved OS-CFAR; 3) performing intra-frame data association on the rough detection results formed in the two domains; 4) performing inter-domain matching on the weak correlation track set formed in the two domains; and 5) performing frame-by-frame management on the output flight path. According to the method, confidence judgment is carried out on the tracks in theimage domain and the distance Doppler domain according to the closeness degree of inter-frame data association, inter-frame matching processing is carried out on the weakly combined tracks, high falsealarm and high missing alarm conditions in the image domain or the distance Doppler domain are effectively reduced, and real-time detection and tracking of the video SAR moving target are realized.

Description

technical field [0001] The invention belongs to the technical field of radar, and further relates to a moving target tracking method based on cross-domain combination of video-synthetic aperture radar (video-SAR) in the technical field of radar signal tracking. The invention can be used for real-time detection, tracking and track formation of moving targets in video SAR. Background technique [0002] Video SAR imaging radar can perform real-time imaging of ground target areas all day, all weather, and with high precision. It has the characteristics of high imaging frame rate and high resolution, and can effectively overcome the vulnerability of infrared or visible light sensors to weather conditions and battlefield environments. At the same time, it can also overcome the shortcomings of conventional SAR systems such as low frame rate and difficulty in detecting and tracking moving targets. The target detection of video SAR can be mainly based on two types of methods: one is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/155G06T7/254G06T7/262G06T7/38G06T5/30G06T5/00
CPCG06T7/38G06T5/30G06T7/155G06T7/262G06T7/254G06T2207/10032G06T5/70
Inventor 丁金闪仲超徐众
Owner XIDIAN UNIV
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