Method for tracking extended targets by means of extracting feature points by aid of frameworks

A technology of skeleton extraction and expansion target, which is applied in the field of maneuvering expansion target tracking and can solve problems such as easy tracking and missing targets.

Active Publication Date: 2014-03-12
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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AI Technical Summary

Problems solved by technology

Since the target has no feature information to characterize and identify the target, the attitude changes greatly, and the traditional tracking method based on gray features tends to lose the target when the target

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  • Method for tracking extended targets by means of extracting feature points by aid of frameworks
  • Method for tracking extended targets by means of extracting feature points by aid of frameworks
  • Method for tracking extended targets by means of extracting feature points by aid of frameworks

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Embodiment Construction

[0069] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. This embodiment is carried out on the premise of the technical solution of the present invention, and the detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

[0070] The invention is based on an extended target tracking method using Hough transformation and skeleton extraction of feature points, and the input image is a sequence of single-station photometric aircraft model images.

[0071] Such as figure 1 As shown, the present invention provides a kind of extended target tracking method utilizing Hough transform, skeleton extraction feature point, comprises the following steps:

[0072] Step 1. Image preprocessing. Due to defects in lighting or imaging systems, acquired images to be processed will be affected by noise, thereby affecting subseq...

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Abstract

The invention discloses a method for tracking extended targets by means of extracting feature points by the aid of frameworks. The method includes preprocessing to-be-processed images by means of Gaussian smooth filtering so as to remove influence of noise on follow-up algorithms; dividing the smoothened images by an FCM (fuzzy C-means cluster) algorithm to acquire binary images; performing Hough transformation on the binary target images acquired by means of dividing the smoothened images, detecting first certain portions on the targets, extracting the feature points of second certain portions on the targets by the aid of the frameworks, linearly fitting the feature points on the frameworks to acquire axes of the targets, and utilizing intersection points of straight lines of the axes as final tracking points. Linear features of the first certain portions on the targets are obvious. Linear features of the second certain portions on the targets are unobvious. The method has the advantage that the targets can be stably tracked under the condition of violent posture change.

Description

technical field [0001] The invention relates to a method for tracking a maneuvering extended target, in particular to a method for tracking a maneuvering extended target by using Hough transformation and extracting feature points from a skeleton, which is mainly used in image processing and computer vision. The invention belongs to the technical field of target detection and tracking in a photoelectric measurement system. Background technique [0002] In the photoelectric measurement system, in order to improve the tracking accuracy, the field of view of the detector is relatively small, and the target size is too large. In the detector, therefore, the object takes on an expanded form. For long-distance target imaging, due to degrading factors such as atmospheric turbulence, system jitter, and optical system aberrations, the imaging of the target in the system is very blurred and the contrast is poor; in addition, the target has no texture information, has various shapes, a...

Claims

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Application Information

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IPC IPC(8): G06T7/20G06T5/00G06K9/46
Inventor 胡锦龙彭先蓉魏宇星李红川
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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