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A camera Ptz control method and device for target tracking

A technology of target tracking and control method, which is applied in the field of camera control, can solve the problems of camera stuttering, non-smoothness, incoherence, etc., and achieves the effect of solving stuttering and incoherence.

Inactive Publication Date: 2017-04-19
CHINA SECURITY & FIRE TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention proposes a camera PTZ control method and device for target tracking, which can precisely control the rotation of the camera at different speeds according to different areas, so that the camera can achieve accurate positioning and smooth transition, and solve the problem of The existing camera freezes, incoherence, and unevenness when moving

Method used

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  • A camera Ptz control method and device for target tracking
  • A camera Ptz control method and device for target tracking
  • A camera Ptz control method and device for target tracking

Examples

Experimental program
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Embodiment 1

[0067] see figure 1 , which is a flow chart of a camera PTZ control method for target tracking provided by an embodiment of the present invention, specifically comprising the following steps:

[0068] S101. Obtain a relative position of a tracked target in a video frame.

[0069] In this embodiment, the relative position refers to the relative position of the tracked target in the video frame from the center point of the frame image;

[0070] The relative position in the horizontal direction of the X-axis can be calculated by the formula Calculated;

[0071] Among them, posx is the x coordinate of the point where the tracked target is located, width indicates the width of the image, and abs refers to the absolute value of the content in brackets;

[0072] The relative position in the vertical direction of the Y axis can be calculated by the formula Calculated;

[0073] Among them, posy is the y-axis coordinate of the point where the tracked target is located, and height...

Embodiment 2

[0111] see figure 2 , the specific implementation method of the present invention will be described in detail below by taking the setting of three levels of regions in the video frame image as an example.

[0112] S201. Divide the first area (hereinafter referred to as area 1), the second area (hereinafter referred to as area 2), and the third area (hereinafter referred to as area 3) from near to far from the center point of the image, such as image 3 As shown, in each level region, the level speed of the camera movement is different. Intuitively, the level speed of the camera moving in the first area is lower than that in the second area, and the level speed of the camera moving in the second area is lower than that in the third area, that is, the moving speed of the camera in the third area is faster than that in the third area. Fast, while the movement speed of the camera in Zone 2 is slower than that in Zone 3, and Zone 1 is the area where the camera motion stops. In t...

Embodiment 3

[0172] The present invention also provides a camera PTZ control device for target tracking, please refer to Figure 6 , which is a schematic diagram of a camera PTZ control device for target tracking provided by an embodiment of the present invention, specifically including a target position acquisition module 601, a level speed setting module 602, an angular velocity conversion module 603, an actual angular velocity conversion module 604, and an actual level Speed ​​conversion module 605, grade speed output module 606; the specific functions of each module are as follows:

[0173] The target position acquisition module 601 is configured to acquire the relative position of the tracked target in the video frame.

[0174] Specifically, there are two ways to select the target to be tracked, one is to manually select the target to be tracked; the other is to draw rules in the specified area, such as wandering, reverse and warning areas, when the corresponding rules are triggered ...

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Abstract

The invention belongs to the field of video monitoring, and provides a camera PTZ (pan / tilt / zoom) control method and device for target tracking. The method comprises the steps of obtaining the relative position of a tracked target in a video frame; setting the camera grade speed in each region, wherein the setting of the grade speed is determined according to the relative position of the tracked target deviating from the center point of the frame image in the video frame, and the farther the relative position is from the center point, the higher the camera grade speed goes; converting the camera grade speed into a camera reference angular speed; calculating the current camera actual angular speed according to the camera reference angular speed; converting the current camera actual angular speed into a camera actual output grade speed. The method and device provided by the invention can achieve an aim of accurately controlling the camera to rotate at different grade speeds in different areas so as to realize an effect of accurate positioning and smooth transition of the camera, and the phenomena of stuck, discontinuous and unsmooth movement of the existing camera are solved.

Description

technical field [0001] The present invention relates to the field of video surveillance, in particular to a method for controlling a camera during PTZ (Pan / Tilt / Zoom abbreviation, which represents pan-tilt omnidirectional (up and down, left and right) movement and lens variable magnification, zoom control) object tracking and device. Background technique [0002] In the field of video surveillance, PTZ cameras are widely used for object tracking in wide areas. Compared with traditional cameras with fixed cameras, PTZ has multiple advantages such as wide monitoring range, increased tracking target scene, and variable focal length. Using these advantages, combined with video image analysis, target tracking and positioning, and PTZ camera control, it can be used in certain scenes. Internally track, capture and alarm the tracked target. [0003] Most of the current PTZ tracking technologies focus on the optimization and improvement of the algorithm level. Most algorithms reali...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F11/32
Inventor 张甜甜王军陈先开吴金勇聂志辉
Owner CHINA SECURITY & FIRE TECH GRP
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