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A method for establishing machine vision applied to elevator safety monitoring

A machine vision and safety monitoring technology, applied in elevators, transportation and packaging, etc., can solve the problems of promotion and application in difficult-to-resident communities, complicated information collection, and large data processing volume, so as to improve the safety of elevator rides and reduce the amount of information collection. , the effect of simple environment

Active Publication Date: 2019-01-25
XIAN SPECIAL EQUIP INSPECTION INST
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AI Technical Summary

Problems solved by technology

[0018] In order to solve the problems existing in the current elevator safety monitoring and processing method based on machine vision, such as complicated collection information, large data processing volume, and difficulty in popularizing and applying in residential communities, the present invention provides a new image information collection method applied to elevator safety monitoring, In this way, it can facilitate the later video analysis, and quickly and effectively realize the automatic alarm of abnormal operation status of the elevator and / or abnormal activities in the elevator

Method used

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  • A method for establishing machine vision applied to elevator safety monitoring
  • A method for establishing machine vision applied to elevator safety monitoring
  • A method for establishing machine vision applied to elevator safety monitoring

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Embodiment Construction

[0044] 1. Background modeling:

[0045] Considering that the elevator car is a closed space, the installation position of the camera is fixed, the environment is simple and basically does not change, and it is illuminated by a fixed light source, the intensity of the light in the car does not change much. Therefore, when extracting the human body foreground Select the background subtraction algorithm to extract the human body in the elevator car. For the background difference method, it is very important to obtain the real background, so the background model must be established first. Considering the invariance of the actual background and the simplicity of the algorithm, the time averaging method is chosen to model the background.

[0046] The temporal averaging method is to sum the video frames over a period of time and then average them.

[0047]

[0048] where B(x,y) represents the background model, B i(x, y) represents the i-th frame image.

[0049] 2. Foreground ex...

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Abstract

The invention provides an image information acquiring method applied to elevator safety monitoring, which can be convenient for later video analysis to quickly and effectively realize automatic warning of an abnormal elevator operation state and / or an abnormal activity in an elevator. The method comprises the following steps: images shot by cameras with fixed positions serve as background models; differential images are obtained through differences between present video frames and the background models by a background subtracting method, the binarization processing is performed for the differential images according to binarization formulas, the noise is removed through a morphological filter algorithm, and finally, the area communication analysis is performed for denoised results; edge profiles of the binarized images are extracted by Canny calculators; and human body standing images are modeled in an edge profile form, and are stored to compare with foreground profiles extracted in real time through a template matching algorithm so as to build basic machine vision.

Description

technical field [0001] The invention relates to an image information collection and processing method for elevator video monitoring, which is used to realize automatic alarm of elevator abnormal running state and / or abnormal activity in the elevator based on machine vision. Background technique [0002] While elevators bring convenience and convenience to people, they also challenge people's safety. Since the elevator is a relatively closed public place, on the one hand, it provides an excellent place for criminals to carry out illegal activities, and incidents such as fights and robberies in the elevator car occur frequently; on the other hand, when a person takes the elevator alone, especially It is the elderly who may have a sudden illness and fall in the elevator. If they are not discovered in time, it may be life-threatening. In order to build a safe living environment, video monitoring devices are installed in the elevator cars of many high-rise residential areas, hot...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66B5/00
CPCB66B5/0012
Inventor 王晶韩建军李红昌
Owner XIAN SPECIAL EQUIP INSPECTION INST
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