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Target tracking method for video sequence

A target tracking and video sequence technology, applied in image data processing, instrumentation, computing, etc., to achieve the effect of reducing error accumulation, reducing the influence of interference information, and high robustness

Active Publication Date: 2017-03-08
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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AI Technical Summary

Problems solved by technology

[0003] At present, due to the influence of external factors such as complex background and illumination and internal factors such as target rotation and occlusion, the tracking process is usually in an uncontrolled environment, so target tracking is still a challenging problem.

Method used

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  • Target tracking method for video sequence

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Experimental program
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Embodiment Construction

[0054] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0055] Such as figure 1 As shown, a target tracking method for a video sequence includes the following steps:

[0056] Step 1: Normalize the target image to reduce light interference and improve operating efficiency.

[0057] Step 2: According to the target position in the initial frame, extract the spatio-temporal context information of the target, build a spatio-temporal context model, and establish the relationship between the spatio-temporal context model and the target position confidence map, so as to track the target. The specific process is as follows:

[0058] a. Establish the relationship between the spatial context model and the target position confidence map:

[0059]

[0060] In formula (1), P(x|m(z), o) is the spatial context model, which represents the spatial relationship between the target and the surrounding context ...

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Abstract

The invention discloses a target tracking method for a video sequence. The target tracking method comprises the steps of performing normalization processing on a target image firstly; then extracting space-tine contextual information of the target according to a target position of an initial frame, constructing a space-time contextual model, and establishing a relation between the space-time contextual model and a target position confidence map so as to perform target tracking; then determining whether the learning rate of the space-time contextual model is updated or not by adopting a sheltering mechanism, and updating the space-time contextual model by the updated learning rate; and finally, establishing a dimension updating process according to time-space significance between front and back frames in the target tracking process. According to the target tracking method, the target tracking is realized based on the space-tine information by combination with the sheltering processing mechanism and the space-time significance, so that the target tracking robustness and real-time property can be effectively improved.

Description

technical field [0001] The invention belongs to the fields of computer vision and digital image processing, and in particular relates to a video sequence target tracking method. Background technique [0002] Target tracking is one of the hot research topics in the field of machine vision. It is widely used in human-computer interaction, video tracking, navigation and other fields. It is also the basis for follow-up work such as target recognition and behavior recognition in video. Therefore, target tracking has a wide range of applications. The prospect and practical value have attracted great attention from researchers all over the world. [0003] Currently, the tracking process is usually in an uncontrolled environment due to external factors such as complex backgrounds, lighting, and internal factors such as target rotation and occlusion, so target tracking is still a challenging problem. Contents of the invention [0004] In order to solve the technical problems raise...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/246
CPCG06T2207/10016G06T2207/20081
Inventor 杨欣张芹兰夏斯军刘冬雪周大可张鹏高菊
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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