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Enhanced Median Filtering Method and System Based on Polynomial Regression Smoothing Correction

A polynomial regression and smoothing filtering technology, applied in pulse technology, pulse processing, electrical components, etc., can solve the problems of the decrease of random impulse noise filtering effect, the destruction of local information of random impulse noise, the inability to effectively filter the residual of random impulse noise, etc. To achieve the effect of enhancing the filtering ability

Active Publication Date: 2020-10-02
SHANDONG UNIV
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Problems solved by technology

However, when the measurement data changes rapidly, the filtering effect of the median filter on random impulse noise decreases, specifically showing that it cannot effectively filter random impulse noise and generates a filter residue higher than the background noise near it, destroying the local area near the random impulse noise. information

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  • Enhanced Median Filtering Method and System Based on Polynomial Regression Smoothing Correction
  • Enhanced Median Filtering Method and System Based on Polynomial Regression Smoothing Correction
  • Enhanced Median Filtering Method and System Based on Polynomial Regression Smoothing Correction

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[0030] The present disclosure will be further described below in conjunction with the accompanying drawings and embodiments.

[0031] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0032] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinati...

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Abstract

The invention provides an enhanced median filtering method and system based on polynomial regression smoothing correction, and the method comprises the steps: obtaining a sampling data sequence, carrying out the median filtering, and calculating the filtering residue; Judging whether random pulse noise and a potential position thereof exist or not according to the random pulse noise threshold value and the filtering residue; And if so, determining a certain data in the potential position as a center, determining a local data sequence, calculating a polynomial regression smoothing filtering matrix, correcting the local data sequence by using the polynomial regression smoothing filtering matrix, and replacing an element at the corresponding position of the original local sequence with the corrected sequence to obtain a background noise part. According to the invention, self-adaptive detection of random pulse noise can be realized.

Description

technical field [0001] The present disclosure relates to an enhanced median filtering method and system based on polynomial regression smoothing correction. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] The analysis and control system based on real-time measurement data such as power, voltage / current amplitude, frequency, and phase is an indispensable part of the safe and stable operation of modern power systems, such as data acquisition and monitoring control systems (SCADA systems), wide-area monitoring systems (WAMS system). However, the measurement data is often interfered by background noise and impulse noise, which affects the analysis results and even causes wrong control instructions. The impact of impulse interference is the most serious. Impulse noise is random, with low occurrence but high amplitude. The random switching o...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K5/1252H03H17/02
Inventor 张恒旭靳宗帅刘伟生石访
Owner SHANDONG UNIV
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