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Insulator crack detection method based on maximum entropy threshold optimization of Canny operator

A technology for crack detection and threshold optimization, applied in computing, image data processing, instruments, etc., can solve the problems of low accuracy of visual detection, high labor intensity of maintenance personnel, and inconvenient maintenance work, etc., to achieve easy programming and fast implementation The effect of detecting and improving accuracy

Inactive Publication Date: 2020-06-05
YICHANG POWER SUPPLY CO OF STATE GRID HUBEI ELECTRIC POWER CO LTD
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Problems solved by technology

[0005] The technical problem of the present invention is that in the existing insulator crack detection method, the accuracy rate of visual detection is not high. Whether it is visual inspection or instrument test method, the maintenance personnel need to be close to the insulator, which brings inconvenience to the maintenance work. High labor intensity and low efficiency

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  • Insulator crack detection method based on maximum entropy threshold optimization of Canny operator
  • Insulator crack detection method based on maximum entropy threshold optimization of Canny operator
  • Insulator crack detection method based on maximum entropy threshold optimization of Canny operator

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Embodiment Construction

[0046] Such as Figure 1-3 As shown, the insulator crack detection method based on the maximum entropy threshold optimization of the Canny operator includes the following steps:

[0047] Step 1: Use the UAV to collect the insulator image, preprocess the insulator image, and rotate and transform the insulator image so that the center line of the insulator in the image is in the vertical direction, and then grayscale the image, enhance the contrast, and denoise;

[0048] Step 1.1: Grayscale the insulator image;

[0049] Step 1.2: Enhance the contrast of the insulator image;

[0050] Step 1.3: Denoise the insulator image;

[0051] Step 2: Calculate the maximum entropy of the gray value of the insulator image;

[0052] Step 3: Perform Gaussian filtering on the insulator image;

[0053] Step 4: Calculate the gradient magnitude and direction of the insulator image, and perform non-maximum suppression on the gradient magnitude;

[0054] Step 5: Set a high threshold and a low thr...

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Abstract

The invention discloses an insulator crack detection method based on maximum entropy threshold optimization of a Canny operator. The method comprises the steps of: collecting an insulator image, and carrying out the preprocessing of the insulator image, calculating the maximum entropy of the gray value of the insulator image, performing Gaussian filtering on the insulator image, calculating the gradient amplitude and the direction of the insulator image, carrying out non-maximum suppression on the gradient amplitude of the insulator image, setting a high threshold value and a low threshold value for the insulator image, taking the maximum entropy of the gray value of the insulator image as the high threshold value, and extracting an insulator edge image by adopting a Canny operator, and carrying out crack detection on the insulator edge image containing the cracks. According to the method, the insulator can be monitored in real time, manpower and material resources are reduced, the working efficiency is improved, the probability that the insulator breaks down due to cracks is greatly reduced, and safety and stability of a power grid are guaranteed.

Description

technical field [0001] The invention belongs to the field of insulator detection, and in particular relates to an insulator crack detection method based on the maximum entropy threshold optimization of a Canny operator. Background technique [0002] With the continuous acceleration of my country's industrialization process, the continuous improvement of the economic level, and the continuous strengthening of power grid construction, the power network is becoming more and more complex. Correspondingly, the work intensity of power grid maintenance is also increasing, and quickly and accurately judging the health status of insulators brings difficulty to power grid maintenance. [0003] Insulators are exposed to the atmosphere and work in harsh environments such as strong electric field, strong mechanical stress, sudden cooling and sudden heat, wind, rain, snow, fog, and chemical corrosion for a long time. Cracks will inevitably occur in the insulator. At present, the existing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T7/13G06T7/11G06T7/136G06T7/194G06T5/00
CPCG06T7/0004G06T7/13G06T7/11G06T7/136G06T7/194G06T2207/10004G06T2207/20024G06T2207/30108G06T5/70
Inventor 李黄强姚钦杨世勇杜杨李镇翰李宇宸李阳李百川饶晨辰曹威杨政
Owner YICHANG POWER SUPPLY CO OF STATE GRID HUBEI ELECTRIC POWER CO LTD
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