Method and device for detecting violent crowd movement

It is a technology of strenuous exercise and detection method, which is applied in image data processing, instrument, character and pattern recognition, etc. It can solve the problems of inability to accurately detect abnormal crowd behavior and inability to popularize and apply it.

Active Publication Date: 2010-06-23
NETPOSA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for complex actual scenes, the above methods cannot accurately detect abnormal behaviors of the crowd, so they cannot be widely applied

Method used

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  • Method and device for detecting violent crowd movement
  • Method and device for detecting violent crowd movement
  • Method and device for detecting violent crowd movement

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Embodiment Construction

[0026] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the embodiments and accompanying drawings.

[0027] figure 1 It is a flow chart showing the method for detecting violent movement of crowds according to the present invention. like figure 1 Shown, according to the detection method of crowd's violent movement of the present invention can comprise:

[0028] The first step 101 is to acquire video frame images, and perform grayscale processing on the colored frame images;

[0029] In the second step 102, the relative motion of the two frames of images is obtained by using the optical flow method;

[0030] In the third step 103, according to the relative motion of the optical flow, the historical graph of energy change is obtained;

[0031] The fourth step 104 is to use the historical map of energy changes as a template to calculate the pixe...

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Abstract

The invention provides a method for detecting violent crowd movement, which can effectively detect violent movement in a public place, such as fights, exchange blows. The method first acquires video frame images, and grays the colored frame images; an optical flow method is adopted to obtain the relative motion between two frame images; then, according to the relative motion of optical flow, an energy change historigram is obtained; with the energy change historigram as a template, pixels with great direction change are calculated, and a violent movement historigram is obtained; the violent movement historigram is binarized, and whether the binarized connected region thereof belongs to a violent movement region is judged; and finally, the region marking violent movement is outputted.

Description

technical field [0001] The invention relates to image processing and video monitoring, in particular to a method and device for detecting violent movement of crowds. Background technique [0002] In order to ensure the stability of social security and the stability of people's lives, video surveillance devices have been installed in various large and medium-sized cities in my country. These video surveillance devices need to have different detection functions according to the application places. Among them, in important public places such as stations, airports, supermarkets, commercial blocks, sports fields, etc., it is very important to detect abnormal behavior of crowds. [0003] International patent application WO 2007 / 064559A1 discloses a method for detecting abnormal crowd behavior. The method first detects crowd clusters in a scene, and then analyzes crowd behavior (such as fighting) by calculating the entropy value of the clusters. However, for complex practical sce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/20G06K9/00
Inventor 袁雪庚
Owner NETPOSA TECH
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