Multi-target detection and localization method based on building perspective radar imaging

Abstract

The invention discloses a multi-target detection and positioning method based on building perspective radar imaging. The method includes back projection imaging, superimposed binarized images, target enhancement, acquisition of image matrix accumulation vectors, target position extraction, and target area normalization. . The invention uses the backward projection imaging method to speed up the imaging of the area to be detected, and realizes the target correlation between consecutive frames after the imaging of the non-connected domain detection by superimposing the binarized image and the target enhancement processing, and enhances the target amplitude, which is beneficial to the subsequent detection. The multi-target enhancement detection based on image directionality is realized by acquiring image matrix accumulation vector, target matching extraction, and target area normalization processing, which effectively enhances targets with low echo amplitudes covered by strong targets, thereby improving weaker targets. The detection rate of the target has the advantages of good real-time performance and high target detection probability, and has extremely high application value in the field of building perspective radar technology.

Description

technical field [0001] The invention belongs to the technical field of building perspective radar, in particular to a multi-target detection and positioning method based on building perspective radar imaging. Background technique [0002] Building perspective radar obtains relevant information of the area of ​​interest by analyzing the echo data of targets such as human bodies behind buildings obtained from the transceiver device, so as to realize the detection and positioning of moving human targets in closed buildings. In recent years, it has been used in street fighting, Anti-terrorism, disaster rescue, security inspection and other fields have been more and more widely used. When there are multiple targets in a single area in the scene to be tested, differences in the target amplitudes often appear in the image due to the differences in motion states and echo intensities among the targets. In view of this situation, if ordinary threshold detection is used, it will be di...

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Problems solved by technology

[0004] The purpose of the present invention is: in order to solve the problem that the existing technology cannot quickly and real-time improve the detection rate of targets with low echo amplitudes covered by strong targets in buildings, the present invention proposes a method suitable for building perspective Real-time multi-target detection and positioning method after imaging of radar

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