Border-crossing detection method based camera angle

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...

AI Technical Summary

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 together

In addition, due to the limitations of actual conditions, the installation of the camera cannot be in the most ideal position. If the camera placement angle shifts, the observation image will also shift, which will reduce the accuracy of intrusion detection.

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