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Protection pressing plate state identification method based on image processing shadow removal optimization

A technology for protecting the pressure plate and image processing, which is applied in the directions of image data processing, image enhancement, image analysis, etc., can solve the problems of large changes in the light source environment in the control room of the substation, the impact of operating status identification, and the impact of identification results, etc., to achieve image quality Not demanding, reducing shadow interference, eliminating the effect of shadow areas

Pending Publication Date: 2020-11-10
CHINA THREE GORGES UNIV
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Problems solved by technology

This method has a better identification effect, but if the shooting angle deviates when taking the image of the platen, then misjudgment will occur
[0004] It can be seen that most of the current research methods on the state of the pressure plate have their own applicability, but the light source environment in the control room of the substation changes greatly, and the identification of the operating state will be affected by natural light and multi-point lighting. Environmental factors will affect the identification results

Method used

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  • Protection pressing plate state identification method based on image processing shadow removal optimization
  • Protection pressing plate state identification method based on image processing shadow removal optimization
  • Protection pressing plate state identification method based on image processing shadow removal optimization

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Embodiment

[0075] see figure 1 , in order to preprocess the collected images of the platen so as to facilitate subsequent identification of the state of the platen, the specific contents include:

[0076] Step 1: Grayscale processing. The collected original platen image is described in the RGB color space in numerical form, and then the grayscale processing of the image is completed through the grayscale conversion formula. Here, the average value method is used to grayscale, and the grayscale processing formula is as follows: (1);

[0077] Step 2: Contrast enhancement. Enhanced platen grayscale image contrast. The linear function is used to linearly expand the gray image of the platen, and the pixels are enlarged for gray scale stretching. Its mathematical formula is as formula (2);

[0078] Step 3: Neighborhood mean segmentation based on OTSU algorithm to remove uneven illumination. By improving the OTSU algorithm, the gray value of the collected image is analyzed, combined with ...

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Abstract

The invention discloses a protection pressing plate state identification method based on image processing shadow removal optimization, and the method comprises the steps: carrying out the graying of aprotection pressing plate color image, converting the protection pressing plate color image into a gray-scale image, carrying out the contrast enhancement and binarization of the gray-scale image, and eliminating a shadow region; obtaining a convex hull of each protection pressing plate switch through a Graham algorithm principle, then connecting the convex hulls into a rectangle through a minimum enclosing rectangle principle, and obtaining the rectangular area. setting a threshold value for the rectangular area; if the rectangular area is greater than the threshold value, determining that throwing-out is performed, otherwise, determining that throwing-in is performed. According to the method, the influence of shadow interference can be effectively reduced, the requirement on the qualityof the acquired image is not high, and the robustness is high; the influence of shadow interference can be effectively reduced, and the operation state of the pressing plate in the image can be accurately identified.

Description

technical field [0001] The invention relates to the technical field of power grid intelligent inspection, in particular to a state identification method of a protection pressure plate based on image processing and shadow removal optimization. Background technique [0002] With the rapid development of my country's economy and society, the operation and maintenance mode of the power system is gradually changing to automation and intelligence. Relay protection equipment is an important part of the power system, and its operating state needs to match the operation mode of the primary equipment. Therefore, real-time checking of the operating status of protection devices has always been a key technology to ensure the safe and stable operation of the power grid. With the popularization and application of automation and intelligent technology in substations, it has laid a foundation for intelligent inspection. However, at present, most of the protection hard plate of secondary equ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00G06T5/40G06T7/00G06T7/11G06T7/136G06T7/62G06T7/90
CPCG06T5/40G06T7/0004G06T7/11G06T7/136G06T7/62G06T7/90G06T2207/10004G06T2207/30164G06T5/94Y04S10/50
Inventor 舒征宇高健汪俊许欣慧李镇翰姚景岩许布哲沈佶源胡尧马聚超李浩张洋
Owner CHINA THREE GORGES UNIV
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