Automatic security inspection method for multi-view matching and tracking

Abstract

The invention discloses an automatic security inspection method for multi-view matching and tracking. The method consists of structure estimation and target detection, wherein the structure estimationcomprises the following steps of first extracting an SIFT feature, performing dimensionality reduction on the feature by using a principal component analysis method, constructing a visual vocabularytree to sort unordered images, matching the key points of two consecutive images, eliminating mismatched points by using a random sampling consensus algorithm based on sampling optimization, and finally minimizing all re-projection errors by using bundle adjustment; and the target detection comprises the following steps of first subjecting the image sequence to single-view detection, merging all the regions with a matching and tracking algorithm after the matching of two views, three views and a plurality of views to generate a consistent trajectory of m items of interest in the image sequence, and finally performing multi-view analysis on the merged trajectory to obtain the final detection result of the image sequence. The automatic security inspection method for multi-view matching and tracking provided by the invention effectively reduces the calculation amount and improves the precision of dangerous goods detection.

Description

technical field [0001] The invention relates to the technical fields of security inspection technology, image processing and computer vision, in particular to an automatic security inspection method for multi-view matching and tracking. Background technique [0002] X-ray security checks are crucial to maintaining the safety of public places such as train stations and airports. The appearance of items in security inspection images will be affected by external factors such as overlapping and occlusion, and due to differences in the imaging principles of single-view security inspection equipment and restrictions on the viewing angle of security inspectors, security inspection images will also be complex and diverse. In this way, when the security inspector browses the X-ray image, it is easy to cause fatigue, which greatly increases the false detection rate of the security inspection equipment and reduces the detection accuracy. [0003] At present, multi-view security inspec...

AI Technical Summary

Problems solved by technology

Although multi-view security inspection equipment can reduce the interference caused by overlapping and occlusion to a certain extent, security inspectors need to observe several images of different viewing angles at the same time, which is more likely to cause visual fatigue

In addition, multi-view security inspection equipment is not cheap, which is not conducive to the popularization of various transportation places

[0004] To sum up, single-view security inspection equipment can only observe images from one viewing angle, which is greatly disturbed by factors such as overlap and occlusion, and relies on the observation of security inspectors, which will largely affect the accuracy of dangerous goods detection

Multi-view security inspection equipment will generate images from multiple perspectives. Relying on security inspectors to observe several images at the same time will cause visual fatigue, and the cost of multi-view equipment is high, which is not conducive to large-scale application

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