Cable porcelain shell terminal infrared image de-noising method considering inter-scale correlation

An infrared image and correlation technology, applied in image enhancement, image analysis, image data processing and other directions, can solve the problems of unsatisfactory denoising effect and neglect of correlation, etc., and achieve the effect of effectively removing noise.

Inactive Publication Date: 2017-11-14
ZHUHAI POWER SUPPLY BUREAU GUANGDONG POWER GIRD CO
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  • Abstract
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Problems solved by technology

However, the soft threshold function denoising method ignores the inter-scale correlation of wavelet coefficients, and the denoising effect is not ideal.

Method used

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  • Cable porcelain shell terminal infrared image de-noising method considering inter-scale correlation
  • Cable porcelain shell terminal infrared image de-noising method considering inter-scale correlation
  • Cable porcelain shell terminal infrared image de-noising method considering inter-scale correlation

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Embodiment Construction

[0032] The accompanying drawings are for illustrative purposes only, and should not be construed as limitations on this patent; in order to better illustrate this embodiment, certain components in the accompanying drawings will be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art It is understandable that some well-known structures and descriptions thereof may be omitted in the drawings. The positional relationship described in the drawings is for illustrative purposes only, and should not be construed as a limitation on this patent.

[0033] This embodiment mainly includes the following steps:

[0034] 1. The base wavelet is determined to be sym4, and the number of wavelet decomposition layers is 5;

[0035] 2. Perform two-dimensional wavelet decomposition on the infrared image to obtain the scale coefficient on the highest decomposition layer and the wavelet coefficients in three directions on different decomposi...

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Abstract

The invention relates to a cable porcelain shell terminal infrared image de-noising method considering the inter-scale correlation, which includes the following steps: (1) inputting a cable porcelain shell terminal infrared image to be de-noised; (2) carrying out two-dimensional wavelet decomposition on the infrared image to get a scale coefficient of the highest decomposition layer and wavelet coefficients in three directions of different decomposition layers; (3) calculating the absolute value of the inter-scale correlation coefficient of the wavelet coefficients; (4) using a means clustering method to divide the absolute value of the correlation coefficient obtained in step (3) into a correlation coefficient of effective wavelet coefficients and a correlation coefficient of non-effective wavelet coefficients; (5) directly setting the non-effective wavelet coefficients obtained in step (4) to zero, and retaining the effective wavelet coefficients obtained in step (4); and (6) using the scale coefficient of the highest decomposition layer obtained in step (2) and the processed wavelet coefficients obtained in step (5) to carry out two-dimensional wavelet reconstruction to get a de-noised infrared image. Through the de-noising method of the invention, noise can be removed, and the details of the image can be all retained.

Description

technical field [0001] The invention relates to the technical field of infrared image processing, and more particularly, to a method for denoising an infrared image of a cable sleeve terminal considering the correlation between scales. Background technique [0002] Infrared diagnostic technology based on infrared images has been successfully applied to the state detection and fault monitoring of electrical equipment, and has achieved remarkable results in generator fault diagnosis and equipment insulation diagnosis. The infrared image detection method of the cable porcelain sleeve terminal has been widely concerned in recent years because of its safety, accuracy, economy and practicality. Whether the infrared image of the cable sleeve terminal is clear, whether the details of the image are complete, and whether the features are obvious are the keys to a correct diagnosis. Infrared images are affected by detector noise and various electronic device noises during the generati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00G06K9/62
CPCG06T5/002G06T2207/30108G06T2207/10048G06T2207/20064G06F18/23
Inventor 吴炬卓
Owner ZHUHAI POWER SUPPLY BUREAU GUANGDONG POWER GIRD CO
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