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 complex calculation, unstable tracking, low reliability, etc., to simplify the algorithm, improve stability and robustness, and improve reliability. Effect
Inactive Publication Date: 2012-05-23
NANJING UNIV OF POSTS & TELECOMM
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[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
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[0045] The realization of the multi-target tracking method based on moving target detection in the video monitoring of the present invention mainly comprises the following steps:
[0046] Step 1: Detect moving objects using background removal method
[0047] (1) subtract the current frame grayscale image from the background image, and take the absolute value to obtain the difference image;
[0048] (2) Using an adaptive threshold, binarize the difference image;
[0049] (3) Perform post-processing on the binary image such as morphological opening-closing operation, labeling of connected areas, filling of "holes", size of connected areas and aspect ratio judgment of the smallest circumscribed rectangle, after eliminating the influence of noise and background disturbance , to obtain the foreground target binarization mask;
[0050] (4) Use the binarization mask of the foreground target and the input image of the current frame to perform a logic "AND" operation to detect the mo...
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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 monitoring system. Background technique [0002] Target detection and tracking in video sequences is an important research topic in the field of computer vision. It is the basis for subsequent processing such as target classification and behavior analysis. It has important application value in many fields such as intelligent traffic control, intelligent video surveillance, and military guidance. [0003] In recent years, people have proposed multi-sum methods for target tracking, which can be summarized into the following four categories: [0004] (1) Region-based tracking: first establish a target template, and track the target according to the template. The restriction is that the target cannot be occluded, otherwise it is easy to lose the target; [0005] (2) Feature-based tracking: extract...
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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