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Rapid extraction method and system for target central point

A technology of target center and extraction method, applied in the field of image processing, can solve the problems of easy detection of a large number of false targets, time-consuming, etc., and achieve the effects of good adaptability, improved accuracy and little impact

Inactive Publication Date: 2016-04-06
SUZHOU INST OF BIOMEDICAL ENG & TECH CHINESE ACADEMY OF SCI
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Problems solved by technology

If the exact range of key parameters (such as radius) cannot be given, the transformation process will be very time-consuming, and it is easy to detect a large number of false targets (such as circles)

Method used

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  • Rapid extraction method and system for target central point
  • Rapid extraction method and system for target central point

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Embodiment Construction

[0053] In order to make the purpose, technical solution and beneficial technical effects of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific implementations described in this specification are only for explaining the present invention, not for limiting the present invention.

[0054] see figure 1 , an embodiment of the present invention provides a method 100 for quickly extracting a target central point, comprising the following steps:

[0055] Step S110: Obtain a binarized image;

[0056] In this embodiment, binarization processing is performed on the input image. In practical applications, in order to improve the processing speed of image binarization, the threshold needs to be given an empirical value. The empirical value of the threshold can be calculated in advance by a threshold calculation algorithm (such as t...

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Abstract

The invention provides a rapid extraction method and system for a target central point. All connecting areas in an obtained binary image are marked; a target connecting area is detected according to the marked connecting areas; an external rectangular area is determined based on the target connecting area; and thus a target central point coordinate in the external rectangular area is obtained. In the prior art, the multiplication and division operation load for the employed edge detection, Hessian matrix, Hough conversion, and fitting algorithms is heavy. However, according to the provided method, the most operation of the image binaryzation, connecting area marking and center of mass method belongs to the logic operation and adding and subtraction operation, so that the execution efficiency is high.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a method and system for quickly extracting a center point of a target. Background technique [0002] The feature point of the target refers to the point that is convenient to obtain the coordinates by the method of image processing. The feature points have the same motion characteristics as the target, so the extraction of target feature points is a key step in target tracking and positioning. The target has different feature points due to different geometric shapes. For example, the feature point of the circle is the center point, the feature point of the line and bar shape is the center point, and the feature point of the checkerboard is the corner point, etc. Targets used for optical positioning often use the center point as a feature point, so center point extraction is the most common feature point extraction method. [0003] There are many target center point ext...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/20
CPCG06V10/23
Inventor 刘仰川高欣
Owner SUZHOU INST OF BIOMEDICAL ENG & TECH CHINESE ACADEMY OF SCI
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