Expansion target stable trace point extraction method

A technology of extended target and extraction method, which is applied in the field of extraction of stable tracking points of extended targets, which can solve problems such as violent shaking, easy sliding of tracking points, tracking loss, etc., and achieve the effects of small shaking, reduced risk of loss, and robust tracking

Inactive Publication Date: 2012-12-19
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0004] In order to overcome the deficiencies of the prior art, the present invention provides a method for extracting tracking points based on chord-arc ratio contour smoothness and target head stability, which solves the problem of easy sliding or severe shaking of tracking points in the original method when tracking extended targets, resulting in tracking loss question

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  • Expansion target stable trace point extraction method
  • Expansion target stable trace point extraction method
  • Expansion target stable trace point extraction method

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Embodiment Construction

[0027] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0028] The extraction of the stable tracking point of the extended target in the present invention can be realized by hardware or by software. For example, it can be installed and executed in the form of software on personal computers, industrial computers and servers, and the method of the present invention can also be embodied in the form of embedded chips in the form of hardware. Specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0029] The invention is suitable for imaging and tracking equipment to track an extended target in the field of view, especially when the target is relatively close to the imaging device, the target body is clearly imaged in the...

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Abstract

The invention discloses an expansion target stable trace point extraction method which comprises the following steps of: firstly, recovering the expansion target successfully identified by early association into a binary image; then, performing contour tracing to obtain the contour point array arranged in order; smoothing the target contour by use of a method based on chord-arc ratio filtering, removing the sharp arc section on the target contour, and linearly connecting two endpoints of the removed arc section to form a new closed contour after filtering; calculating the head direction of the target by combining the target motion direction and the main shaft direction, and then obtaining the forefront point in the head direction of the target; and calculating the centroid in the local round area as a trace point by taking the forefront point as the center. Through the method, the finally calculated target trace point is stable and reliable, severe shake is avoided, the tracing stability is improved, and the risk of tracing loss is reduced.

Description

technical field [0001] The invention belongs to the field of image processing, and relates to a method for extracting a target tracking point, in particular to a method for extracting a stable tracking point of an extended target based on the smoothness of the chord-arc ratio profile. Background technique [0002] With the development of optical imaging tracking requirements, the stable tracking of targets, especially the stable tracking of extended targets, is becoming more and more urgent. When the distance between the target and the imaging and tracking equipment is relatively close, the target presents the characteristics of an extended target, occupying 1 / 3 of the field of view or even filling the field of view. As far as the extraction position of target tracking points is concerned, the original tracking method based on centroid and centroid is no longer suitable for tracking extended targets, which can easily lead to segmentation failure and loss of targets. At this...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/20
Inventor 雷涛蒋平周进吴钦章
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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