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Target tracking method and device

A target tracking and target technology, applied in character and pattern recognition, instruments, computer parts, etc., can solve problems such as the decline of tracking accuracy, achieve high-accuracy tracking, and solve the effect of mutual occlusion

Inactive Publication Date: 2017-08-29
CHINA MOBILE GROUP ZHEJIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] If the above-mentioned method of recognizing the whole body of a person is applied in a crowded scene, the body of the person may be blocked by other people's bodies, so the tracking accuracy will drop significantly

Method used

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  • Target tracking method and device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] An embodiment of the present invention provides a target tracking method, which is applied to a target tracking device. The device may be a part of a server, or a separate device. The method provided in this embodiment is applied to each frame in a real-time video stream detection, such as figure 1 As shown, the method includes:

[0070] Step 101. Obtain the first gradient orientation histogram feature vector of the current frame.

[0071] First, collect the current frame and normalize the current frame to an image of a*a pixels. Calculate the gradient direction histogram of the picture, wherein when calculating the gradient direction histogram feature vector, it is calculated by using the method of large window (large window is b*b pixel) and small window (small window is c*c pixel) . Specifically, on the current frame, move through the above-mentioned large window and small window with a step size of s, and calculate the gradient direction every time a new position...

Embodiment 2

[0107] An embodiment of the present invention provides a target tracking method, which is applied to a target tracking device, such as figure 2 As shown, assuming that I is a detection image, its current frame is represented by N, and the previous frame is represented by B. The detection image information I obtained in this embodiment is the image information of a shopping mall in Haidian District, Beijing on December 10, 2015 , the target that needs to be tracked is a human head, the method includes:

[0108] Step 201 , acquire image information of detection N.

[0109] Specifically, the detection N is acquired through a vertically downward camera, and the information of I is obtained through computer digitized image information processing.

[0110] Step 202. Calculate the feature vector of the first gradient orientation histogram according to the image information of N.

[0111] Here, according to the method described in step 101 in the first embodiment, the feature vecto...

Embodiment 3

[0138] An embodiment of the present invention provides a target tracking device 30, such as image 3 As shown, the device 30 includes:

[0139] An acquisition module 301, configured to acquire the first gradient orientation histogram feature vector of the current frame;

[0140] A determination module 302, configured to determine the position of the first target window of the current frame according to the feature vector of the first gradient direction histogram, the first target window is a window for determining the position of the target in the current frame ; Also used to obtain the position of the second target window of the previous frame;

[0141] A tracking module 303, configured to track the movement track of the target according to the position of the first target window and the position of the second target window.

[0142] In this way, a large number of targets can be accurately and efficiently detected and identified according to the first target window and the ...

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Abstract

The embodiment of the invention discloses a target tracking method. The method comprises the steps of obtaining a histogram characteristic vector of a current frame in a first gradient direction; according to the histogram characteristic vector in the first gradient direction, determining the position of a first target window of the current frame, wherein the first target window is a target position determining window in the current frame; acquiring the position of a second target window in a previous frame; according to the position of the first target window and the position of the second target window, tracing the motion track of a target. The embodiment of the invention also discloses a target tracking device.

Description

technical field [0001] The invention relates to the fields of security protection and video surveillance, in particular to a method and device for object tracking. Background technique [0002] With the development of society and the continuous improvement of the national economic level, the flow of people has become an indispensable and important data for management and decision-making in public places such as shopping malls, airports, supermarkets, bus stations, and subway stations. For some industries , The flow of people can even directly reflect the business performance of the industry. For example, bus stops, subway stations and other places can use people flow information to analyze the traffic congestion of a certain line; shopping malls can use people flow information to analyze customers' consumption and purchasing habits, and so on. [0003] In the prior art, for example, the purpose of counting the flow of people is achieved by identifying the whole body of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06K9/62
CPCG06V20/53G06F18/2411
Inventor 金振钱军波林翀云凌啼冯杰
Owner CHINA MOBILE GROUP ZHEJIANG
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