Moving target detection and video imaging method based on SAR image sequence
An image sequence and moving target technology, applied in the field of measurement and testing, to achieve the effect of improving reliability, high detection performance, and improving application level
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Embodiment 1
[0064] Such as figure 1 Shown, a kind of moving target detection and video imaging method based on SAR image sequence comprises the following steps:
[0065] S1. Moving target detection, matching and confirmation: Based on the single-channel high-resolution SAR image data, the image sequence is formed by sub-aperture division, and the CFAR algorithm is used to detect the moving target in the image sequence, and the suspected moving target is matched and confirmed. Until all the moving targets are marked, and the imaging sequence of the moving targets is obtained; figure 2 Shown is the flow chart of moving target detection using CFAR algorithm.
[0066] Step S1 comprises the following steps:
[0067] S11. Forming an image sequence: forming a sub-image sequence based on the single-channel high-resolution SAR image full-aperture echo data through sub-aperture division;
[0068] S12. Target detection, matching and confirmation: use the CFAR algorithm to detect moving targets i...
Embodiment 2
[0104] Such as Figure 5 As shown, a moving target detection and video imaging method based on a SAR image sequence, through sub-aperture segmentation imaging of the full-aperture echo data, a sub-image sequence is formed, and moving target detection, matching and confirmation are performed based on the sub-image sequence. After the moving target is confirmed, the position of each moving target in all images is differentiated, the speed of the moving target is estimated by using the position-moving relationship, and the moving target is accurately focused by using the estimated moving target motion parameters, and the focused moving target The target position is differentiated again to obtain a more accurate speed estimate. At the same time, the relationship between the irradiation time of the moving target center and the positioning position of the moving target is used to locate the moving target. Finally, the overlapping time of the sub-aperture is designed according to the ...
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Abstract
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Application Information
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