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Method and device for linkage between radar and dome camera

A ball camera and radar technology, applied in the field of radar and ball camera linkage, can solve the problems of complicated operation, unable to guarantee measurement accuracy, unable to guarantee the linkage accuracy of radar and ball camera, etc., to achieve accurate target monitoring and improve the effect of linkage accuracy.

Active Publication Date: 2022-03-01
HANGZHOU HIKVISION DIGITAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that in this method, the linkage accuracy of the radar and the ball camera depends on the measurement accuracy, and the measurement work is carried out manually. The entire measurement process is not only cumbersome to operate, but also cannot guarantee the measurement accuracy. Linkage accuracy with ball machine

Method used

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  • Method and device for linkage between radar and dome camera
  • Method and device for linkage between radar and dome camera
  • Method and device for linkage between radar and dome camera

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0115] See figure 2 , is a flow chart of an embodiment of a method for linkage between a radar and a ball camera shown in an exemplary embodiment of the present application. The method is described above figure 1 Based on the application scenario shown, the following steps may be included:

[0116] Step 201: Obtain the radar signal of the radar acquisition target object.

[0117] by figure 1 The illustrated application scenario is taken as an example. In the embodiment of the present application, the radar signal of the target object 140 collected by the radar 110 may be acquired.

[0118] Step 202: Determine whether the target object appears in the preset warning area according to the radar signal, and if so, determine the radar coordinate value of the target object in the radar coordinate system according to the radar signal.

[0119] In the embodiment of the present application, based on information such as the frequency spectrum width of the radar signal in the range-D...

Embodiment 2

[0147] See Figure 5 , is a flow chart of another embodiment of a method for linkage between radar and ball camera shown in an exemplary embodiment of the present application, which is used to pre-calibrate the homography matrix that converts radar coordinate values ​​into plane coordinate values. This method is used in the above figure 2 Based on the method shown, the following steps may be included:

[0148] Step 501: Obtain at least one set of calibration parameters, each set of calibration parameters includes N coordinate value pairs, and each coordinate value pair includes the radar coordinate value of the calibration reference object in the radar coordinate system and the calibration reference object in the Cartesian coordinates of the ball camera The plane coordinate value in the system.

[0149] Step 502: Solve a homography matrix for converting radar coordinate values ​​into plane coordinate values ​​based on at least one set of calibration parameters.

[0150] Th...

Embodiment 3

[0167] See Figure 8 , is a flow chart of another embodiment of a method for linkage between a radar and a ball camera shown in an exemplary embodiment of the present application, which is used to pre-calibrate and solve the best observation magnification of the ball camera, that is, the second setting of the Z coordinate value Determine the algorithm, the method in the above figure 2 and Figure 5 Based on the method shown, the following steps may be included:

[0168] Step 801: Obtain at least two sets of calculation parameters, each set of calculation parameters includes the distance between the dome camera and the target object, and the best observation magnification of the dome camera.

[0169] Step 802: Solve a second setting algorithm for calculating the optimal observation magnification of the dome camera according to the distance between the dome camera and the target object based on at least two sets of calculation parameters.

[0170] The above steps 801 to 802 ...

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Abstract

The present application provides a method and device for linkage between a radar and a speed dome camera. The method includes: acquiring a radar signal of a target object collected by the radar; determining whether the target object appears in a preset warning area according to the radar signal, and if The target object appears in the warning area, then determine the radar coordinate value of the target object in the radar coordinate system according to the radar signal; set the radar coordinate value and a predetermined homography matrix Calculate the plane coordinate value of the target object in the Cartesian coordinate system of the ball machine; calculate the target PTZ coordinate value of the ball machine according to the plane coordinate value; calculate the current PTZ coordinate value of the ball machine according to the target PTZ coordinate value and the ball machine value, to control the dome camera to adjust from the current state to the designated state, and when the dome machine is adjusted to the designated state, control the dome camera to collect the video image of the target object. Applying this method can effectively improve the linkage precision of the radar and the dome camera.

Description

technical field [0001] The present application relates to the field of security technology, in particular to a method and device for linkage between a radar and a dome camera. Background technique [0002] In security systems, radars and cameras are commonly used monitoring equipment. Among them, radars use electromagnetic waves to detect targets, and the detected radar signals can reflect information such as the speed and orientation of target objects, and they are not easily affected by the environment during work. , with high stability; the camera uses video images for target detection, and the video images it collects can reflect the intuitive characteristics of the target object. Based on the respective advantages of the two monitoring devices, radars and cameras can be used in combination to achieve security purposes. [0003] In the prior art, a method is proposed to realize target monitoring by linking several radars and several ball cameras. In this method, the ins...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/86G01S13/89H04N7/18
CPCG01S13/867G01S13/89H04N7/18
Inventor 浦世亮张尚迪
Owner HANGZHOU HIKVISION DIGITAL TECH
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