Border-crossing detection method based camera angle

A detection method and camera technology, applied in the field of computer vision, can solve problems such as placing angle offset observation images, offset intrusion detection accuracy, multi-target mutual interference, etc., to reduce work intensity, improve monitoring initiative and work efficiency , a wide range of effects

Inactive Publication Date: 2015-10-14
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

The technical solution provided by this patent can adapt to a certain extent in large areas and complex sites, but the actual environment is often complex and changeable, and multiple targets often interfere with each other when there are multiple people moving to

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  • Border-crossing detection method based camera angle
  • Border-crossing detection method based camera angle
  • Border-crossing detection method based camera angle

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Embodiment Construction

[0052] Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings, so that those skilled in the art can better understand the present invention. It should be noted that in the following description, when detailed descriptions of known functions and designs may dilute the main content of the present invention, these descriptions will be omitted here.

[0053] figure 1 It is a flow chart of a specific embodiment of the camera angle-based cross-border detection method of the present invention. Such as figure 1 As shown, the present invention is based on the cross-border detection method of video surveillance and comprises the following steps:

[0054] S101: Obtain the installation angle of the camera:

[0055] First obtain the angle α between the line of sight of the camera and the ground, then make the vertical plane of the ground along the horizontal direction of the image captured by the camera, and obtain the angle β...

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Abstract

The invention discloses a border-crossing detection method based a camera angle. The method comprises the steps: firstly acquiring an included angle alpha and an included angle beta; obtaining a closed border line and a safe channel line section according to the peak of the border line and the end point of the safe channel line section arranged by a user; expanding and reducing the closed border line to obtain a tracking region; then carrying out moving target detection on every frame of a video monitoring image and screening the moving target region located in the tracking region; then matching and tracking the screened moving target region and the tracking target to obtain a coordinate queue of the tracking target; correcting the center of mass of the tracking target according to the included angles alpha and beta; then carrying out target behavior analysis on the tracking target according to the center of mass; judging whether border-crossing dangers exist or not, if the border-crossing dangers are great, alarming; otherwise, judging whether the current abnormal condition needs to be pre-warned or not according to a safety sign. According to the method disclosed by the invention, adaptive changes are available according to different angles of the camera during target behavior analysis, so that the robustness of border-crossing detection is improved.

Description

technical field [0001] The invention belongs to the technical field of computer vision, and more specifically relates to a method for detecting an out-of-boundary based on a camera angle. Background technique [0002] As one of the main means of modern security, intelligent video surveillance has a very good development prospect. Among them, cross-border detection is an important aspect of intelligent video surveillance. [0003] The current popular cross-border detection is mainly realized by infrared through-beam sensors, laser reflection sensors and other tools. Infrared through-beam sensors use infrared rays from the human body to detect current changes with high accuracy, but are easily interfered by strong sunlight and other light sources containing infrared rays. The laser reflection sensor determines the distance of the measured object by emitting a laser beam and receiving the reflected wave of the laser beam. It has high precision and strong anti-light and electr...

Claims

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Application Information

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IPC IPC(8): G06T7/20G06T7/60
CPCG06T7/20G06T2207/10016G06T2207/30232
Inventor 邹见效陈桦于力徐红兵
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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