Method and device for detecting and tracking target image

Abstract

The invention relates to a method and a device for detecting and tracking a target image, belonging to the technical field of video monitoring. The method comprises the following steps of: detecting a target in a video image frame, and establishing an initial histogram model of the target according to an area in which the detected target is located; carrying out area detection on a subsequent video image frame, and establishing ta tracking histogram model of the target according to the detected area; according to the similarity of the initial histogram model of the target and the tracking histogram model of the target, determining the dimension of the target image at the current time and the central position of the located area, and judging whether the initial histogram model of the target is updated or not; according to the central position of the video image of the current time and the central position of the located area of the target of the current time, adjusting the rotating direction and the speed of a camera head, and adjusting the focus of the camera head according to the dimension of the target image. The invention can be used for detecting and tracking the target in a big scene so as to improve the effect of detecting and tracking the target in the big scene.

Description

technical field [0001] The invention relates to the technical field of video monitoring, in particular to a method and device for detecting and tracking target images. Background technique [0002] In the video monitoring technology, the installation methods of the camera device include fixed installation, pan / tilt all-round up and down, left and right movement, lens zoom, and zoom (Pan / Tilt / Zoom, hereinafter referred to as PTZ) installation. The fixed installation camera device is to fix the camera device at a certain position, and the viewing angle of the camera device cannot be adjusted during the monitoring process. The camera device is installed in the way of all-round up and down, left and right movement, lens zoom, and zoom PTZ. The camera device is set up on the camera device. The stage can rotate freely horizontally (Panning) vertically (Tilting), and adjust the focal length of the camera device (Zooming). [0003] However, when the camera device is installed in a...

AI Technical Summary

Problems solved by technology

[0006] However, the Mean Shift method based on the traditional algorithm needs to accurately mark the initial position of the target manually, and the focal length of the camera device is not adjusted during the tracking process, especially when the scale of the target image changes greatly, resulting in the failure of target tracking

In addition, the PTZ detection and tracking scheme based on the traditional algorithm determines the actual position of the target in the video image through the method of local extremum or probability statistics, resulting in poor tracking effect

The PTZ tracking scheme based on the short-term background difference extracts the target by establishing a background model for tracking. However, when the moving speed of the target is very slow or static, the target information is mixed, which easily leads to blindness of tracking, and cannot effectively determine the specific tracking. what target, and the target tracking error

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