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Machine vision-based twisted pair pitch measuring method

A measurement method and machine vision technology, applied in measurement devices, instruments, optical devices, etc., can solve the problems of high labor intensity, inability to real-time automatic detection of twisted pairs, and large detection errors.

Active Publication Date: 2015-09-09
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

At this stage, the pitch measurement method of twisted pair is through manual measurement. The staff manually measures the pitch of the twisted pair at the industrial site, which leads to the fact that the pitch of the twisted pair cannot be automatically detected in real time. During the detection process There are disadvantages of slow detection speed, large detection error and high labor intensity

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  • Machine vision-based twisted pair pitch measuring method
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Embodiment Construction

[0038] Below in conjunction with accompanying drawing, the twisted pair pitch measuring method based on machine vision of the present invention is described in detail:

[0039] Step 1: Use the camera to collect twisted pair images;

[0040] Step 2: Perform anti-shake processing on the video in step 1. The algorithm is based on feature matching and affine transformation to obtain each frame of image after anti-shake processing;

[0041] Step 2-1: read the previous frame image as the reference image, and extract scale-invariant feature points;

[0042] Step 2-2: Read the current frame and calculate the feature points, use the affine transformation model to register with the reference image, and use the registered image as the new current frame.

[0043] Step 3: Binarize the image obtained in step 2 according to the set gray threshold to obtain a binary image;

[0044] Step 3-1: Set the gray threshold in the binarization process to be the gray threshold obtained by using the ma...

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Abstract

The invention belongs to the digital image processing technical field and discloses a machine vision-based twisted pair pitch measuring method, in particular, a pitch measuring method for a twisted pair in an image. The method includes the following steps that: graying and binarization processing is performed on the image; the edge of the twisted pair image is searched; recessed point detection is performed on the edge of the twisted pair image; and finally, pitch points can be found, and the pitch of the twisted pair can be calculated. Thus, with the method adopted, high automation degree and high measuring speed can be realized in a twisted pair pitch measuring process.

Description

technical field [0001] The invention belongs to the technical field of digital image processing, in particular to a method for measuring twisted pair pitch in an image. Background technique [0002] Twisted pair is a transmission medium made of two mutually insulated wires twisted together according to certain specifications. The length of a twisted period of a twisted pair is called the pitch. It determines the quality of the wire and cable, and the smaller lay length can form the opposite direction of the electromagnetic field to effectively cancel each other's influence, thereby reducing the external radiation of the line. To improve the quality of products, different types of twisted wires require different lay lengths. At this stage, the pitch measurement method of twisted pair is through manual measurement. The staff manually measures the pitch of the twisted pair at the industrial site, which leads to the fact that the pitch of the twisted pair cannot be automatical...

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Application Information

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IPC IPC(8): G01B11/14
Inventor 刘娟秀袁阳张静倪光明叶溯谢煜刘霖叶玉堂刘永
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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