Method to detect violent behaviors in elevator car

A technology of elevator car and detection method, which is applied to instruments, character and pattern recognition, elevators, etc., can solve problems such as limited application scope, and achieve the effect of avoiding false alarms

Active Publication Date: 2018-03-09
SPECIAL EQUIP SAFETY SUPERVISION INSPECTION INST OF JIANGSU PROVINCE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, judging that violent frames appear when a person's hands or feet are raised parallel to the ground or on a larger slope can only be applied to one type of situation, and the scope of application is limited.

Method used

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  • Method to detect violent behaviors in elevator car
  • Method to detect violent behaviors in elevator car
  • Method to detect violent behaviors in elevator car

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Embodiment Construction

[0042] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0043] figure 1 It is a method flowchart of a method for detecting violent behavior in an elevator car provided by an embodiment of the present invention, such as figure 1 Said, the method may include the following steps:

[0044] Step 110, acquire the captured video of the elevator car.

[0045] Step 120, perform Shi-Tomasi corner point detection according to continuous video frames in the captured video to determine feature points.

[0046] Jianbo Shi and Carlo Tomasi proposed a feature point suitable for tracking, also known as Shi-Tomasi corner point.

[0047] In image tracking, not all parts of the image contain complete motion information. In order to avoid excessive calculation and extraction of invalid information, it is necessary to track corner points or windows that change drastically in space, that is, firstly, Find feature p...

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Abstract

The invention discloses a method to detect violent behaviors in an elevator car and relates to the field of behavior recognition. The method comprises: acquiring a recorded video of the elevator car;performing Shi-Tomasi angular point detection according to continuous video frames in the recorded video to determine characteristic points; calculating by Lucas-Kanada optical flow algorithm according to the characteristic points to obtain an optical flow vector; judging whether the video frames are violent frames according to the optical flow vector, wherein the violent frames are video frames containing violent behaviors; giving warnings according to occurrence frequency of the violent frequencies. By using the method, the problem is solved that the way where violent frames are determined when human hands or feet are raised to be parallel to the ground or to form a greater slope is applicable to only category and has limited applicable range, and it is achieved that violent behaviors are determined accurately according to action amplitudes of human violent behaviors.

Description

technical field [0001] The invention relates to the field of behavior recognition, in particular to a method for detecting violent behavior in an elevator car. Background technique [0002] Passenger violence is the most common abnormal behavior that occurs in elevator cars, including violence between passengers such as fighting and robbing property, as well as violence that destroys public facilities such as kicking and smashing doors. [0003] For the detection of violent behavior, at present, the adaptive background difference method is used to obtain the foreground area in the video, and then the statistical information of the foreground pixels is used to obtain the movement trajectory of the person and its various parts. Violent frames appear when parallel or on a larger slope. [0004] However, judging that a violent frame occurs when a person's hand or foot is raised to be parallel to the ground or a larger slope can only be applied to one type of situation, and the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66B5/00B66B5/02G06K9/00G06K9/46
CPCB66B5/0012B66B5/0037B66B5/02G06V20/44G06V20/40G06V10/44
Inventor 张媛蒋铁锁臧坤华志超
Owner SPECIAL EQUIP SAFETY SUPERVISION INSPECTION INST OF JIANGSU PROVINCE
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