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A method and system for detecting abnormal behavior of pedestrians

A detection method and pedestrian technology, applied in the fields of instrument, calculation, character and pattern recognition, etc., can solve the problems of low efficiency and complex process, and achieve the effect of improving efficiency, saving manpower, and avoiding the process of complex model learning.

Active Publication Date: 2020-08-25
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] It can be seen that most of the current abnormal behavior detection methods of pedestrians need to establish complex models, and then carry out model learning, which is inefficient and complicated

Method used

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  • A method and system for detecting abnormal behavior of pedestrians

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Embodiment Construction

[0020] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] refer to figure 1 As shown, it is a flow chart of a preferred embodiment of a method for detecting abnormal behavior of pedestrians in the present invention.

[0022] In step S1, the target pedestrian in the video frame is tracked by using the track segment association method. in particular:

[0023] In the first step, the trajectory segment of the pedestrian is generated according to the video frame:

[0024] Pedestrian detection is performed in the video frame by the HOG (Histogram of Oriented Gradient, histogram of oriented gradient) method, and then the pedestrian is tracked by the optical flow method. Due to the presence of occlusions, optical flow tracking is easily stopped, generating a segment of the pedestrian's trajectory.

[0025] The second step is to use the social relationship distribution SAM (social affinity...

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Abstract

The invention relates to a pedestrian's abnormal behavior detection method comprising the steps as follows: tracking a target pedestrian in a video frame through a trajectory segment correlation method; respectively calculating the movement distances of the target pedestrian and pedestrians around the target pedestrian in the video frame in the whole tracking process; and judging whether there is an abnormal behavior according to the calculated movement distances of the target pedestrian and the pedestrians around the target pedestrian in the video frame in the whole tracking process. The invention further relates to a pedestrian's abnormal behavior detection system. Through the method and the system, the wandering or lingering behavior of a pedestrian in walking can be detected, so that monitoring personnel can find the cause of a security problem more efficiently, and manpower is saved.

Description

technical field [0001] The invention relates to a method and system for detecting abnormal behavior of pedestrians. Background technique [0002] In recent years, as security issues have received increasing attention from society, abnormal behavior detection in videos has become more and more important. Inconsistent with the behavior of the surrounding pedestrians, there are wandering or lingering behaviors, and these behaviors may cause some safety problems. [0003] By analyzing the surveillance video, and then judging some abnormal behaviors that cause security problems, a large amount of information that is useless to security in the surveillance video can be filtered out, saving a lot of manpower. [0004] At present, the detection of abnormal behavior of pedestrians is usually to track the target pedestrian, obtain the trajectory of the target pedestrian, detect the abnormal behavior of the target pedestrian through the consistency of the trajectory and the scene mode...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00
Inventor 董露李娜冯良炳
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI