Method and device for using PTZ camera to automatically track target

Abstract

The invention provides a method and device for using a PTZ camera to automatically track a target. The method includes dividing a focal length change range into a plurality of level scales, dividing a panorama in each level scale into a set of part of scenes, and building a background model for the part of scenes; extracting ORB feature points of a current video frame, finding part of scenes matched with the ORB feature points of the current video frame in each level scale, and using the matched part of scenes to detect a foreground object of the current video frame; and using a detection result of the foreground object of the current video frame to optimize a tracking result, adjusting the PTZ camera according to the tracking result, and keeping a tracked target in a monitoring picture. The method and device for using the PTZ camera to automatically track the target has the following beneficial effects: the method and device can process focal length change, can avoid the stitching problem and the motion parallax problem, reduces the cost of updating a model, is relatively fast in scene positioning speed, and is relatively high in accuracy.

Description

technical field [0001] The invention relates to the field of video monitoring, in particular to a method and device for automatically tracking a target by using a PTZ camera. Background technique [0002] Video surveillance is an important part of the security system, and it is a comprehensive system with strong prevention capabilities. Video surveillance is widely used in many occasions because of its intuition, accuracy, timeliness and rich information content. In recent years, with the rapid development of computer, network, image processing and transmission technology, video surveillance technology has also made great progress. At present, according to the different types of surveillance cameras used in the surveillance system, they can be divided into bolt camera (fixed camera) surveillance and PTZ (Pan / Tilt / Zoom) camera (ball camera) surveillance. Because PTZ cameras have the advantages of larger monitoring scenes, wider range of tracking targets, and variable focal ...

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is that, aiming at the defects of the prior art that the above-mentioned inability to deal with focal length changes, stitching problems between frames and panoramas, motion parallax, high cost of updating models, slow scene positioning speed, and low accuracy, provide A method and device for automatically tracking a target using a PTZ camera that can handle focal length changes, avoid stitching problems and motion parallax problems, reduce the cost of updating models, and have faster scene positioning speed and higher accuracy

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