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Robust target tracking method based on support vector machine

A support vector machine and support vector technology, applied in image data processing, instrumentation, computing and other directions, can solve problems such as tracking drift, achieve good real-time and robustness, and solve the effect of tracking drift

Active Publication Date: 2014-10-08
NANJING NANYOU INST OF INFORMATION TECHNOVATION CO LTD
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AI Technical Summary

Problems solved by technology

[0009] Technical problem: the purpose of this invention is to provide a kind of robust tracking method based on support vector machine, to solve the problem of tracking drift caused by target motion crossing, half occlusion or temporarily leaving the picture in video tracking

Method used

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  • Robust target tracking method based on support vector machine

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Embodiment Construction

[0025] 1. Architecture

[0026] 1, figure 1 Shown is the method of extracting samples in the update support vector stage. The center point is the center of the current positive sample frame. The sample network group is constructed according to the method of bisecting the radius and angle, and the points are staggered on the radius. This method of taking points can be used in Reduce the amount of computation without reducing the number of features.

[0027] 2, figure 2 Shown are the two parts of the Kalman filter, the time update and the measurement update, where, Indicates the position of the target in k frames, u k-1 Indicates the control amount of k-1 frames to the system, this paper sets u k-1 to zero, P k is the error covariance, Q and R are process noise and measurement noise respectively, which do not change with system state changes. A is the state transition matrix: A = 1 ...

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Abstract

A robust target tracking method based on a support vector machine comprises the steps of sample selection, support vector update, online target tracking based on the structured support vector machine, Kalman amendment and target repositioning. The invention aims at providing an improvement method for solving a tracking drifting problem caused by error accumulation produced when target motions are cross, half-occluded or temporarily leave away a frame. For the cross or half-occluded target motions, the support vector update is determined by adopting an interframe target matching degree fluctuating value, and a tracking result is corrected by combining Kalman filter. For the situation that a target temporarily leaves away the frame, the target repositioning is performed by adopting a support vector update stopping and search strategy changing method. The robust target tracking method improves the tracking real-timeliness and robustness and effectively solved the tracking drifting problem caused by the error accumulation.

Description

technical field [0001] The invention relates to the field of tracking drift in video target tracking, and specifically relates to the technical field of video image processing. Background technique [0002] Target tracking technology is one of the core technologies in the intelligent video target tracking system. Its basic task is to determine the position and attitude of the target in each frame according to the spatial and temporal correlation of video information in the sequence of images. With the needs of anti-terrorism, public safety and safe cities in the world, security has become an important field of video target tracking applications. However, the current level of intelligence in video surveillance facilities is low, and most of them only record video data for subsequent inquiries. Functions such as video target behavior analysis and tracking cannot meet the needs of reality. [0003] Video object tracking mainly includes learning-based, feature-based and region-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/20G06T5/00
Inventor 李晓飞刘梦刘浏吴鹏飞
Owner NANJING NANYOU INST OF INFORMATION TECHNOVATION CO LTD
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