Screen image processing method

A screen image and processing method technology, applied in image data processing, image enhancement, image analysis, etc., can solve the problem of low contrast of instrument screen image

Pending Publication Date: 2022-01-21
北京中恒博瑞数字电力科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention proposes a method for processing screen images, which solves the problem of low contrast of screen images of instruments and meters in substations in the related art

Method used

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Experimental program
Comparison scheme
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Embodiment 1

[0060]The implementation of the screen image processing method specifically includes the following steps:

[0061] Step S1, get the input original image f(x,y)

[0062] Step S2, preprocessing the original image f(x,y) to obtain the screen image g(x,y), the main steps are as follows:

[0063] Perform a power function transformation on the input image to improve image contrast

[0064] g(x,y)=pf(x,y) q

[0065] Among them, p is a constant, q is a power transformation coefficient, and f(x,y) is the value before transformation. This method will automatically determine the light conditions when the photo was taken according to the source of the photo and the weather, and automatically set the appropriate γ parameter. Among them, the source of the photos is distinguished according to the number of the shooting equipment, and the weather collection device is installed in the substation, which can judge the weather category. By storing the coefficient table in advance, the q in im...

Embodiment 2

[0105] The screen image processing device of this embodiment includes:

[0106] The first obtaining unit is used to obtain the screen image g(x,y);

[0107] The first conversion unit is used to convert the screen image g(x, y) to the frequency domain to obtain the frequency domain image g(u, v);

[0108] The first filtering unit is used to filter the frequency-domain image g(u,v) by using the improved homomorphic filtering formula H(u,v) to obtain the frequency-domain denoising image s(u,v), wherein, s(u,v)=H(u,v)g(u,v);

[0109] The improved homomorphic filtering formula specifically includes:

[0110]

[0111] Among them, γ H , γ L 、D H 、D L and c are constants, D(u,v) represents the frequency difference between the frequency of any pixel (U,V) in the frequency domain image g(u,v) and the center frequency;

[0112] The second conversion unit is configured to restore the frequency-domain noise-reduced image s(u, v) to the space domain to obtain the first noise-reduc...

Embodiment 3

[0119] Based on the same inventive concept as the first embodiment above, this embodiment proposes a computer-readable storage medium, wherein a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, the above-mentioned The steps of the screen image processing method.

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Abstract

The invention relates to the technical field of power distribution automation, and provides a screen image processing method, which comprises an image noise reduction step and specifically comprises the following steps of: obtaining a screen image g(x, y); converting the screen image g (x, y) to a frequency domain to obtain a frequency domain image g(u, v); determining the cut-off frequency DH of a high-frequency component and the cut-off frequency DL of a low-frequency component; adopting an improved homomorphic filtering formula H(u, v) to perform filter processing of the frequency domain image g(u, v) to obtain a frequency domain noise reduction image s (u, v), wherein s(u, v) = H(u, v)g(u, v); and restoring the frequency domain noise reduction image s(u, v) to a spatial domain to obtain a first noise reduction image. According to the technical scheme, the problem that in the prior art, the screen image contrast of instruments and meters in a transformer substation is low is solved.

Description

technical field [0001] The invention relates to the technical field of power distribution automation, and in particular, to a screen image processing method. Background technique [0002] In recent years, with the rapid development of the national economy and power system, the requirements for the safe and reliable operation of power equipment (such as power instruments and meters) have been continuously improved, and online status monitoring of power systems has become an important scientific research and engineering application direction. [0003] The image recognition and analysis system is used in the online status monitoring system of the power system to automatically identify the display data of power instruments and meters. The existing image recognition and analysis system has a better recognition effect for high-quality images with higher imaging quality and better visual effects. Strong reflection phenomenon, the visual effect of the imaging is poor, especially in...

Claims

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Application Information

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IPC IPC(8): G06T5/00G06T5/10G06T5/20
CPCG06T5/10G06T5/20G06T2207/20028G06T2207/20056G06T5/90G06T5/70
Inventor 黄辉付龙明周兴华仇向东周庆捷张永浩
Owner 北京中恒博瑞数字电力科技有限公司
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