Method for detecting ground-falling behavior of passenger in elevator car

Abstract

The invention discloses a method for detecting the ground-falling behavior of a passenger in an elevator car and relates to the field of behavior identification. The method comprises the steps of acquiring a shot video and a target background image; according to the target background image, extracting a foreground pixel from each video frame so as to obtain a to-be-confirmed foreground pixel graph; denoising the to-be-confirmed foreground pixel graph to obtain a target foreground pixel graph; performing edge detection on each video frame to obtain an edge graph; performing edge detection on the target background image in the initial state to obtain an edge background graph; determining the number of pixels in an edge foreground according to the edge graph and the edge background graph; dividing the elevator car into an upper area and a lower area; according to the number of foreground pixels in the upper area, the number of foreground pixels in the lower area and the number of pixels in the edge foreground in the upper area, determining whether a video frame is an alternative ground-falling frame or not; according to the occurrence frequency of the alternative ground-falling frame,sending out an alarm. According to the invention, the rapid calculation is achieved. Meanwhile, the effect of alarming the ground-falling behavior of a passenger can be effectively achieved.

Description

technical field [0001] The invention relates to the field of behavior recognition, in particular to a method for detecting the behavior of passengers falling to the ground in an elevator car. Background technique [0002] Passengers may faint in the elevator car due to heat stroke, hypoglycemia, heart disease and other reasons. Once fainted in the elevator, there will be no one to treat them, which will lead to serious consequences. [0003] If there is only one passenger in the car, the danger of the passenger will increase after fainting. Since a camera is installed in the car, the video in the car is captured by the camera. The comparison method is used to judge whether the passenger falls to the ground. [0004] However, usually after a passenger falls to the ground, due to the limitation of the shooting angle of the camera installed in the car, it is impossible to ensure that the torso of the fallen passenger is completely captured by the surveillance camera, so the me...

AI Technical Summary

Problems solved by technology

[0004] However, usually after a passenger falls to the ground, due to the limitation of the shooting angle of the camera installed in the car, it is impossible to ensure that the torso of the fallen passenger is completely captured by the surveillance camera, so the method of judging based on the outline of the human body or the aspect ratio of the human body is relatively limited.

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