Method and device for recognizing target object in video image on basis of radar signal

Abstract

The invention provides a method and device for recognizing a target object in a video image on the basis of a radar signal. The method comprises the following steps: acquiring a radar signal and a video image, acquired by a radar and a camera at the same moment, of a target object; based on the radar signal, determining a projection region of the target object in a planar coordinate system of theradar; mapping the projection region to a planar coordinate system of the image, and obtaining location inforamtion and width information of the target object in the video image; determining height information of the target object in the video image; and based on the location information, the width information and the height information, determining an image region of the target object in the video image. By applying the method provided by the invention, the targe object invading a monitoring region can be completely and accurately recognized from the video image, so that whether a suspiciousobject invades the monitoring region can be accurately monitored.

Description

technical field [0001] The present application relates to the field of security technology, in particular to a method and device for identifying a target object in a video image based on a radar signal. Background technique [0002] In a traditional security system, a single monitoring device is usually used to monitor the monitoring area, so as to send an alarm when a suspicious object is detected to intrude into the monitoring area. Among them, the camera can be used to collect video images of the monitoring scene, and the foreground object can be extracted from the collected video image, and then the feature extraction of the foreground object can be performed through the computer vision algorithm to determine whether the foreground object is a suspicious object; The radar detects the monitoring scene, and by processing and analyzing the detected radar signal, it is determined whether there is any suspicious object intruding into the monitoring scene. [0003] However, o...

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Problems solved by technology

[0003] However, on the one hand, the video images collected by the camera are easily affected by the environment. For example, in severe weather conditions such as heavy fog and wind and rain, the video images collected by the camera will not be clear, and thus cannot be accurately extracted from the video image. If the complete foreground target is obtained, the characteristics of the foreground target cannot be accurately extracted; on the other hand, the radar is used to detect the monitoring scene, although the detected radar signal is not affected by the environment, and the target object can be obtained based on the radar signal However, since the radar signal does not reflect the intuitive characteristics of the detected target object, it is impossible to further classify and identify the detected object based on the radar signal to determine whether the detected object is suspicious. object

[0004] To sum up, in the traditional security system, the use of a single monitoring device cannot accurately monitor whether suspicious objects have intruded into the monitoring area.

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