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Multi-target track method based on moving target detection in video monitoring

A multi-target tracking and moving target technology, applied in the field of multi-target detection and tracking, can solve the problems of unstable tracking, complex calculation, low reliability, etc., to improve stability and robustness, simplify algorithms, and improve reliability. Effect

Inactive Publication Date: 2010-11-17
NANJING UNIV OF POSTS & TELECOMM
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AI Technical Summary

Problems solved by technology

[0007] (4) Model-based tracking: Generally, an accurate geometric model is used for tracking, and the model parameters are updated in a timely manner, which can accurately track the target, but the calculation is more complicated
But when the target coincides or separates, the reliability is low and the tracking is unstable

Method used

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  • Multi-target track method based on moving target detection in video monitoring
  • Multi-target track method based on moving target detection in video monitoring
  • Multi-target track method based on moving target detection in video monitoring

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Embodiment Construction

[0045] The realization of the multi-target tracking method based on moving target detection in the video surveillance of the present invention mainly includes the following steps:

[0046] Step 1: Detect moving objects using background removal

[0047] (1) subtract the grayscale image of the current frame from the background image, and obtain the difference image by taking the absolute value;

[0048] (2) Use adaptive threshold to binarize the difference image;

[0049] (3) Perform post-processing on the binary image, such as morphological opening-closing operation, labeling of connected areas, filling "holes", area size of connected areas and judging the aspect ratio of the smallest circumscribed rectangle, etc. After eliminating the influence of noise and background disturbance , get the foreground target binarization mask;

[0050] (4) Use the foreground target binarization mask and the current frame input image to perform a logical "AND" operation to detect the moving ta...

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PUM

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Abstract

The invention discloses a multi-target track method based on moving target detection in video monitoring. The method comprises the following steps: firstly, using a background removing method to detect foreground moving targets; then establishing an incidence matrix between a foreground target block mass of the current frame and the target detected in a previous frame so as to judge various states of the targets (such as target missing, target keeping initial condition, target overlap, target separation and the like), and secondarily tracking the targets which are in the separation condition; and at last, updating the positions and areas of the targets, kernel weighted color histograms and other characteristics to achieve tracking multiple targets. The method of the invention can be used for effectively and reliably tracking sheltered targets and the multiple targets which are mutually overlapped and then separated in real time, and improving stability and robustness of a video monitoring system.

Description

technical field [0001] The invention belongs to the field of image processing and computer vision, and in particular relates to a multi-target detection and tracking method in a video surveillance system. Background technique [0002] The detection and tracking of targets in video sequences is an important research topic in the field of computer vision, and it is the basis for subsequent processing such as target classification and behavior analysis. [0003] In recent years, people have proposed multi-sum methods for target tracking, which are mainly divided into the following four categories: [0004] (1) Area-based tracking: first establish a target template, and track the target according to the template. The limitation is that the target cannot be blocked, otherwise it is easy to lose the target; [0005] (2) Feature-based tracking: extracting the color, centroid and other feature information of the target, and tracking the target through similarity calculation, genera...

Claims

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Application Information

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IPC IPC(8): G06T7/20
Inventor 卢官明徐腾飞沈苏彬
Owner NANJING UNIV OF POSTS & TELECOMM
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