A Target Tracking Method for Flock of Flying Birds Based on Spatial Distribution Characteristics

Abstract

The invention discloses a bird flock target tracking method based on the spatial distribution characteristics. The bird flock target tracking method is based on bird situation information obtained by a bird exploration radar in real time, and comprises the steps that firstly, the estimated center of a bird flock target collection of the current time is determined, and a plurality of alternative flock target measuring collections are built by the utilization of the membership degree relation; secondly, the spatial distribution characteristics of the alternative flock target measuring collections are extracted, and then the spatial distribution similarity of each alternative flock target measuring collection and a flock target collection of the front time is estimated; finally, the flock estimated center is amended according to the flock target measuring collection with the maximum similarity. The bird flock target tracking method based on the spatial distribution characteristics is applicable to the densely flying bird flock target, and is not affected by flock target measuring deficiency or the spatial position offset.

Description

technical field [0001] The invention relates to a bird swarm target tracking method based on airspace distribution characteristics, belongs to the technical field of low-altitude airspace security monitoring, and relates to radar image processing and target detection. Background technique [0002] "Bird Detecting Radar" is an important technical means for bird situation observation at airports. Its advantage is that it is not restricted by factors such as visibility and bad weather, and can operate automatically around the clock. However, when the radar tracking target is a flock of birds, the spatial distance of the individual targets is very close, the movement mode is roughly the same, there are many echoes and the intersection of correlation gates is serious, so it is very difficult to achieve accurate tracking. If these regular targets are tracked as a group, the problems encountered by the general target tracking method can be avoided, and better tracking results can b...

AI Technical Summary

Problems solved by technology

[0003] Due to the low resolution of the bird detection radar image, the size of a single target is generally smaller than the radar resolution unit; when the bird flock is flying densely, the members who are too close can only occupy one resolution unit, and the fluctuation characteristics of the flying bird target are obvious. During the process, the measurement of some members in the group may be missing, their spatial positions may be shifted, and some false alarm targets may be mixed in, resulting in a significant decline in the performance of traditional group target tracking algorithms

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