Rapid retrograde detecting and tracking monitoring method under complex environment

Abstract

The invention discloses a rapid retrograde detecting and tracking monitoring method under complex environment, and the method comprises the following steps of: extracting moving objective foreground from video frames through a inter-frame difference method, then calculating an optical flow field at each point from the strong corner set of future objectives to obtain the optical flow field set; judging whether a moving direction of the strong corner is within the set retrograde direction and its allowance: if so, recording these points, forming the retrograde point set, and giving a rapid detection warning, at the same time, precisely warning by tracking to judge whether retrograde events are occurred, obtaining the strong corner set required for being tracked, calculating the optical flow field set on each point, upon existence of the retrograde point set, finding out a tracking starting point corresponding to each point from the point set, and drawing up tracking paths; upon completion of tracking, when the amount of paths in a retrograde status is less than a decision threshold, judging rapid warning as a false alarm, otherwise, generating retrograde events. Tracking and precise warning are introduced into the method such that the accuracy rate of the retrograde detection is greatly improved.

Description

technical field [0001] The invention relates to the field of security monitoring, in particular to a fast retrograde detection, tracking and monitoring method in complex environments. Background technique [0002] With the rapid development of domestic modern dialects, human society has higher and higher demands on personal and property safety. In one-way passages, especially in areas where people and vehicles gather, retrograde events are extremely dangerous, causing traffic jams and even accidents. The main task of retrograde detection is to perform real-time retrograde detection of moving targets such as people, objects or vehicles in the monitoring scene, issue an alarm and trigger other related actions. Commonly used retrograde detection methods are as follows: [0003] (1) The retrograde detection method based on optical flow, which can detect the movement of objects, but is sensitive to noise (such as arm swing, lighting, etc.) interference, and is prone to false po...

AI Technical Summary

Problems solved by technology

[0003] (1) The retrograde detection method based on optical flow, which can detect the movement of objects, but is sensitive to noise (such as arm swing, light, etc.) interference, and is prone to false positives and false negatives

[0004] (2) The retrograde detection method based on target tracking. This method can detect retrograde relatively stably, but it needs to detect each target, and the speed is slow. It requires continuous tracking and serious resource occupation. Applicable, easy to lose target

[0005] (3) The retrograde detection method based on optical flow and clustering, which can significantly reduce the complexity of the calculation, but only by clustering the feature points of the optical flow field to determine the retrograde, the detection accuracy is not enough

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