Unmanned aerial vehicle platform-oriented vehicle re-identification method based on multistage attention mechanism

Abstract

The invention relates to an unmanned aerial vehicle platform-oriented vehicle re-identification method based on a multistage attention mechanism, and belongs to the field of vehicle re-identification.Three branches, namely a global branch, a bottom-to-top attention branch and a top-to-bottom attention branch, are used; wherein the global branch outputs 2048-dimensional global features, the attention branch outputs 10240-dimensional local features from bottom to top, the attention branch outputs 2048-dimensional local features from top to bottom, and the features obtained by the three branchesare spliced to serve as final feature output. According to the method, the local features of the vehicle identification area are effectively extracted through the multi-level attention mechanism, meanwhile, the more effective vehicle global features are extracted through the attention mechanism from bottom to top, and more effective feature description is carried out on the target instance by combining the features under various attention mechanisms.

Description

technical field [0001] The invention belongs to the field of vehicle re-identification, and is specifically a vehicle re-identification system combining top-down and bottom-up attention mechanisms. Background technique [0002] With the continuous development of UAV technology, vehicle retrieval based on UAV aerial photography can effectively help ground supervisors to search for designated vehicle targets. It has potential application value in many fields such as criminal investigation and traffic command. However, due to the influence of various factors such as UAV flight height, shooting angle, and light intensity, the vehicle re-identification task for UAV platforms has great complexity. [0003] Existing vehicle re-identification methods are often designed for surveillance video images, and usually rely on fine-grained features such as license plates and logos to assist in the recognition. However, in the vehicle re-recognition task based on UAV aerial images, due to ...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem of insufficient clarity of the image to be recognized and complex changes in the viewing angle of the target object in the vehicle re-identification task for the UAV platform, the present invention provides a vehicle re-identification method based on a multi-level attention mechanism

Images