Fast image recognition method of insulator contour

A technology for image recognition and insulators, which is applied in character and pattern recognition, instruments, overhead lines/cable equipment, etc., and can solve the problems of rare image recognition methods for insulators

Active Publication Date: 2010-01-06
STATE GRID ZHEJIANG ELECTRIC POWER +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] At present, there are very few researches on insulator image recognition methods at home and abroad. Through comprehensive analysis of the characteristics of insulator

Method used

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  • Fast image recognition method of insulator contour
  • Fast image recognition method of insulator contour
  • Fast image recognition method of insulator contour

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The insulator image recognition method proposed by the present invention is developed based on the image features of the above-mentioned insulators, and the algorithm flow is shown in figure 1 . The details are as follows:

[0043] (1) Image reading, grayscale and edge contour extraction

[0044] The image recognition algorithm of the insulator is developed based on the Visual C++ platform, figure 2It is the interface diagram of the console to run the program, where the base class of the image package is CImage. The reading and processing of the image is realized by the functions encapsulated in CImage. CImage is a DIB image encapsulation class library developed by Microsoft, and it is also a base class often used in image processing. The source image that embodiment 1 collects sees image 3 shown. For a color image pixel with three components of R, G, and B, the brightness of the point is calculated according to the following formula:

[0045] I=0.3B+0.59G+0.11...

Embodiment 2

[0081] The insulator image recognition method proposed by the present invention is developed based on the image features of the above-mentioned insulators, and the algorithm flow is shown in figure 1 . The details are as follows:

[0082] (1) Image reading, grayscale and edge contour extraction

[0083] The image recognition algorithm of the insulator is developed based on the Visual C++ platform, figure 2 It is the interface diagram of the console to run the program, where the base class of the image package is CImage. The reading and processing of the image is realized by the functions encapsulated in CImage. CImage is a DIB image encapsulation class library developed by Microsoft, and it is also a base class often used in image processing. For the source image collected in embodiment 2, see Figure 5 shown.

[0084] For a color image pixel with three components of R, G, and B, the brightness of the point is calculated according to the following formula:

[0085] I=0....

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Abstract

The invention discloses a fast image recognition method of an insulator contour, comprising the following steps: (1) transforming a taken color image to a gray image through brightness calculation and extracting the edge contour of the image, and obtaining the shape of a known region after the extraction; (2) carrying out ellipse fitting on the edge contour of the known region, utilizing hough transform to detect a boundary curve and obtain each parameter of a prolate axis, a minor axis and a central point of an ellipse; (3) carrying out threshold processing on contour area, and setting a proper area threshold according to the contour area; (4) carrying out linear fitting on the center of the ellipse, and fitting a line through a two-dimensional point set by seeking sumi rho(ri); and (5) demarcating and outputting insulator pixels. The invention aims at specific requirements of patrol and examination of a helicopter or a robot to an electric transmission line, realizes real-time and precise extraction of the insulator, provides solid foundation for realizing close shot and part defect diagnosis of a follow-up camera, and has favorable theory and application prospect.

Description

technical field [0001] The invention relates to a fast image recognition method for the outline of an insulator. Background technique [0002] For a long time, due to the limitation of geographical environment and other factors, the work of transmission line inspection mainly relies on manual visual observation. This traditional working method can only find some defects on the ground, the bottom of the tower, and some relatively simple and easy-to-see problems such as the self-explosion of glass insulators. defects, lower work efficiency. With the emergence of high-voltage, high-power, and long-distance transmission lines, the geographical environment traversed by transmission lines has become increasingly complex, which has brought many difficulties to line inspections. Automatic inspections of transmission lines using helicopters or robots have become an important part of power development. the trend of. [0003] Helicopter or robot inspections generally record infrared ...

Claims

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Application Information

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IPC IPC(8): G06K9/00G06K9/46H02G1/02
Inventor 韦爱平黄宵宁张亮成剑英张弛徐雄
Owner STATE GRID ZHEJIANG ELECTRIC POWER
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