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Video SAR moving target detection method based on image region accumulation

A moving target and image area technology, applied in the field of data processing, can solve the problems of high maneuvering target point detection performance deterioration, high missing alarms, and prone to false alarms, etc., to remove static shadows and flickering false moving targets, and improve detection accuracy degrees, reducing the effect of computing

Active Publication Date: 2020-01-24
XIDIAN UNIV
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Problems solved by technology

These two methods are based on the operation of image pixels. Since the relationship between the pixels of the shadow of the moving target and the temporal change relationship of the shadow between frames are not considered, it is easy to have false alarms and excessively high missing alarms, resulting in low-speed targets and low-speed targets. Deteriorated detection performance for highly maneuvering target points

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  • Video SAR moving target detection method based on image region accumulation
  • Video SAR moving target detection method based on image region accumulation
  • Video SAR moving target detection method based on image region accumulation

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Embodiment Construction

[0031] The embodiments and effects of the present invention will be further described below in conjunction with the accompanying drawings.

[0032] refer to figure 1 , the implementation steps of the present invention are as follows:

[0033] Step 1: Design the accumulation window and perform regional accumulation on the high frame rate video SAR image sequence.

[0034] 1.1) Set the accumulation window size N:

[0035] The size of the accumulation window is determined by the resolution of the video SAR image sequence and the size of the moving target in the image. If the window size is too small, the shadow area cannot be effectively accumulated, and if the window size is too large, the resolution of the image sequence will be deteriorated. The design rule of the accumulation window is to be equal to the shadow size of the moving object and not larger than the shadow size of the moving object, so as to ensure that the partial shadow area can be completely covered by the acc...

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Abstract

The invention discloses a video SAR (Synthetic Aperture Radar) moving target detection method based on dynamic shadows, which mainly solves the problem that the existing video SAR moving target detection is not steady. The implementation scheme is as follows: 1) designing an accumulation window and carrying out region accumulation on a video SAR image sequence; 2) determining an accumulation threshold and carrying out image reforming on an accumulation result; 3) carrying out binary segmentation on the reformed image; 4) performing connected domain size statistics on the image after binary segmentation, and reserving connected domains of which the sizes are within the range of 0.4 time of the total number of pixel points occupied by the targets and 2 times of the total number of pixel points occupied by the targets; and 5) performing inter-frame correlation processing on the image after connected domain processing to remove non-target shadows, and completing moving target detection. According to the video SAR moving target detection method, the video SAR image is subjected to regionalized multi-frame joint detection, the false alarm probability and the missed alarm probability areeffectively restrained, the detection performance is improved, and the video SAR moving target detection method can be used for tracking and real-time detection of the video SAR moving target.

Description

technical field [0001] The invention belongs to the technical field of data processing, in particular to a method for detecting a SAR moving target, which can be used for tracking and real-time detection of a video SAR moving target. 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 / 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. During video SAR imaging, the moving target image will be defocused and shifted, but it will leave a shadow in its real position, and the imaging shadow will move in the image sequence obtained in the video imaging mode. Therefo...

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Application Information

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IPC IPC(8): G06T7/215G06T7/187
CPCG06T7/215G06T7/187G06T2207/10016G06T2207/10044
Inventor 丁金闪仲超徐众柯凌
Owner XIDIAN UNIV
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