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Fighting detecting method based on stereoscopic vision motion field analysis

A technology of fighting and stereo vision, applied in the direction of instruments, electrical digital data processing, digital data processing parts, etc., to achieve the effect of overcoming the influence of unfavorable conditions

Inactive Publication Date: 2013-01-16
ZHEJIANG ICARE VISION TECH
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Problems solved by technology

[0004] The present invention mainly aims at the defects of the existing fighting detection methods, adopts the method of combining stereo vision and sports field extraction, reduces and filters the optical flow calculation errors caused by illumination changes, target movement confusion and interlaced occlusion, and improves the detection of human fighting behaviors in complex Robustness in the environment

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  • Fighting detecting method based on stereoscopic vision motion field analysis
  • Fighting detecting method based on stereoscopic vision motion field analysis
  • Fighting detecting method based on stereoscopic vision motion field analysis

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with accompanying drawing.

[0022] Such as figure 1 Shown, the inventive method comprises the following steps:

[0023] Step 1: Acquire the binocular video image and convert it to grayscale.

[0024] The second step: Stereo matching of the synchronous frame of binocular video grayscale, obtain the disparity and depth confidence map, and convert the disparity into a depth map. Binocular vision obtains inspiration from the stereoscopic effect produced by human binoculars, and studies how to obtain the depth (distance) information of objects in the scene from the two images obtained by the left and right cameras. figure 2 A schematic plan view of the binocular imaging system is given. In the figure, L and R are two left and right cameras parallel to the main optical axis, and O 1 o 2 is the target object, I L and I R It is the image formed on the left and right imaging planes. in target o 1 o 2...

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Abstract

The invention relates to a fighting detecting method based on stereoscopic vision motion field analysis. The method is as follows: an object human body is extracted according to the motion vector field and the depth map of the object; by taking the motion vector field as the main characteristic, the entropy of a cumulative histogram within a certain time is calculated out based on a block statistics cumulative motion vector direction histogram; a motion intensity degree evaluation strategy is planned according to the depth information of the object by calculating the average motion vector intensity in the block; and finally, the disorder and intensity degree evaluation scores are combined to obtain the probability of fighting behavior, through the time and space accumulation, when the probability of the fighting behavior is continuously greater than a threshold value, then the fighting behavior is confirmed. The fighting detecting method can filter the motion vector calculation errors caused by scene illumination variation and object blocking under the monitoring environment. The intensity degree judgment is more reasonable according to the scene depth information, and the robust detection result is obtained after the analysis of the time and space distribution by establishing the fighting probability model.

Description

technical field [0001] The invention belongs to the technical field of video intelligent monitoring, and relates to a fighting detection method based on stereo vision sports field analysis. Background technique [0002] Use the two-dimensional image registration method to calculate the pixel motion vectors of adjacent frames of the video, perform statistical analysis on the motion vectors of the human body or convert them into energy forms, and extract pixels with chaotic motion directions and fast motion. The collection of these pixels is used as Vigorous exercise area, as the basic feature of multiplayer fights. Through the analysis of the spatio-temporal distribution of the strenuous exercise area, the fight rules based on the sports field are established to judge whether the strenuous exercise area is caused by a fight event, and to realize the detection of such abnormal human behaviors. Patents based on this type of technology include "A Detection Method and Device for...

Claims

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Application Information

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IPC IPC(8): G06F7/00G06F7/20
Inventor 尚凌辉刘家佳王弘玥鲍迪钧高勇
Owner ZHEJIANG ICARE VISION TECH
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