Ptz camera surveillance intrusion detection method

Abstract

A PTZ camera monitoring intrusion detection method, step 1, obtain the background frame, and establish the index of the background frame: first reset the camera, then control the camera to start from the initial angle, and calculate the distance between adjacent image frames every time a frame of image is collected motion parameters; then, according to the translation components obtained from the motion parameters in the x, y, and z directions to estimate the amount of change in the rotation of the camera Pan and Tilt, when the cumulative change in the rotation of the camera Pan and Tilt exceeds the set value, grab a background frame, and mark the background frame with the current motion parameters; step 2, reset the camera again, and use the obtained background frame as the current background; the camera starts to rotate after working, and compares the current image with the current background every time a frame of image is collected. The Pan and Tilt rotation data between are estimated, the background frame and the current frame are registered according to the obtained Pan and Tilt rotation data, and intruding objects are detected by image background removal method.

Description

technical field [0001] The invention relates to a camera state detection method, which can detect intrusion objects from images collected by the camera. Background technique [0002] In the camera monitoring process, the background difference method is usually used to judge whether there is an object intrusion. Which frame to choose as the current background frame needs to know the current state of the camera. The state of the camera is represented by a vector containing two components, which are the horizontal rotation angle and the vertical tilt angle (Pan, Tilt). [0003] Although the current state of the camera can be obtained from the pan / tilt controller, it is necessary to stop the pan / tilt rotation in order to obtain accurate state values, because when the pan / tilt moves, due to the mechanical error of the control structure and communication delay, the obtained state value is not the latest current value. [0004] The establishment and maintenance of the background ...

AI Technical Summary

Problems solved by technology

[0003] Although the current state of the camera can be obtained from the pan / tilt controller, the pan / tilt needs to be stopped to obtain accurate state values, because when the pan / tilt is moving, due to the mechanical error of the control structure and communication delay, the obtained state value is not the current latest value

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