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Tracking method for adaptively adjusting window width by utilizing optimal solution of variance rate

A technology of self-adaptive adjustment and variance ratio, applied in image data processing, instruments, calculations, etc., can solve the problems of undiscovered patent documents, unsuitable for non-rigid object tracking, etc., to reduce adverse effects, improve tracking accuracy, accurate The effect of persistent tracking

Active Publication Date: 2011-05-25
TIANJIN YAAN TECH CO LTD
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Problems solved by technology

Other literature also uses the corner matching of the target in the two frames before and after the video to estimate the affine model parameters of the rigid object, and thus update the window width, but because it relies on corner matching, it is not suitable for tracking non-rigid objects
There are also literatures that use asymmetric kernel functions to extend the mean shift method to obtain the size and direction of the target, but this method is only applicable to targets that are invariant to contour features
[0007] Through searching, no published patent documents identical to this patent application have been found

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  • Tracking method for adaptively adjusting window width by utilizing optimal solution of variance rate
  • Tracking method for adaptively adjusting window width by utilizing optimal solution of variance rate

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Embodiment Construction

[0029] The present invention will be further described in detail below in conjunction with the accompanying drawings and through specific embodiments. The following embodiments are only descriptive, not restrictive, and cannot limit the protection scope of the present invention.

[0030] A tracking method that uses the optimal solution of variance rate to adaptively adjust the window width, such as Figure II shown, including the following steps:

[0031] Step 1, input the first frame image and perform initialization settings (save the initial target template, select the optimal feature space of the first frame, save the optimal feature space index and variance rate value, and save the calculated new weight).

[0032]Initialize the target template and calculate the optimal feature space of the first frame: by manually selecting the target of interest, save the target color histogram RGB template, the histogram dimension R(8bins)*G(8bins)*B(8bins)=512bins. Store the grayscale ...

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Abstract

The invention relates to a tracking method for adaptively adjusting window width by utilizing the optimal solution of variance rate, which is characterized in that: under the existed multi-character space selection mean shift framework, a new object pixel weight distribution formula is provided to replace the traditional EpanechnikovKernel window, the weight of a background interference pixel is effectively reduced, the defect of susceptibility to background interference in the traditional method is overcome, a scheme that the variance rate and a Bhattacharyya coefficient jointly control a target window to zoom is provided, and a long-term problem of object size calibration in the traditional mean shift method is solved. After the method is applied to a plurality of groups of video for experiments, results show that the method is obvious superior to the traditional mean shift method in the aspect of widow adjustment, the window can be accurately adjusted even if a camera is zoomed, and the tracking accuracy is obviously improved.

Description

technical field [0001] The invention belongs to the field of security video monitoring, in particular to a tracking method for adaptively adjusting window width by using the optimal solution of variance rate. Background technique [0002] Object tracking has always been a hot issue in the field of computer vision research, and its applications include video surveillance, human-machine user interface, virtual reality, and so on. How to track objects in video sequences robustly and effectively is the research focus of object tracking. Therefore, a practical tracking system needs to be able to adapt to changes in complex scenes in real time and to adapt to changes in the appearance of objects caused by various motions. [0003] For the dual-camera surveillance equipment that is popular in the current surveillance market, its main working principle is: one fixed-point camera detects a moving target based on a motion detection method, and the other PTZ camera detects the specifi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/40G06T7/20
Inventor 于坤
Owner TIANJIN YAAN TECH CO LTD
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