A method for detecting fighting behavior based on spatiotemporal interest points

Abstract

The invention discloses a fight behavior detection method based on a spatio-temporal interest point. The fight behavior detection method based on the spatio-temporal interest point comprises the following steps: firstly, detecting the spatio-temporal interest point of the current frame; then, segmenting to extract an effective spatio-temporal interest point set; analyzing the distribution of the effective spatio-temporal interest point set and the average displacement amount of the centroid of the effective spatio-temporal interest point set; according to the distribution of the effective spatio-temporal interest point set and the average displacement amount of the centroid of the effective spatio-temporal interest point set, regulating the fight level of the current scene; and outputting the state information ''fight'' or ''normal''. According to the fight behavior detection method based on the spatio-temporal interest point, which is disclosed by the invention, the human body movement in a video is described by the spatio-temporal interest point, and the human body interaction acute degree is detected by analyzing the distribution of the effective spatio-temporal interest point set and the average displacement amount of the centroid of the spatio-temporal interest point set so as to judge whether the fight behavior happens in the current monitoring scene. According to the fight behavior detection method based on the spatio-temporal interest point, the area with drastic movement in the current frame image can be accurately reflected, the fight behavior detection method is unlikely to be affected by the change of environment such as the change of illumination and has the advantages of high detection speed and better robustness, the fight behavior in the scene can be accurately and timely identified, normal behaviors of shaking hands and running and the like can be better distinguished, and the false alarm rate is effectively lowered.

Description

technical field [0001] The invention belongs to the field of computer vision and pattern recognition, and in particular relates to a method for detecting fighting behavior by using monitoring video. Background technique [0002] With the development of economy and technology, cameras have been installed in large numbers in public places. However, in the current monitoring system, manual methods are mainly used to observe whether there are abnormal behaviors in the scene. This method of naked eye observation is time-consuming and laborious, and with the increase of cameras, it is increasingly unable to meet the actual monitoring needs. In recent years, with the development of computer vision and pattern recognition technology, intelligent video surveillance systems have gradually emerged. Fighting behavior detection is an important and challenging content in intelligent monitoring, and it has great application prospects in places such as banks and prisons. So research in t...

AI Technical Summary

Problems solved by technology

In terms of motion feature extraction, the computational complexity of the optical flow method is too large to meet the needs of real-time monitoring

In addition, some machine learning-based methods need to use a large number of training samples for different scenarios, and the implementation is more complicated.

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