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Median-mean value-based underwater hybrid noise rapid filtering technology

A filtering technology and mixed noise technology, which is applied in image data processing, instruments, calculations, etc., can solve the problems of noise pollution, time-consuming, unsatisfactory filtering effect, etc., and achieve the effect of improving real-time performance and suppressing mixed noise

Inactive Publication Date: 2019-02-12
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing filtering methods still have the defects of long time consumption and unsatisfactory filtering effect when the noise pollution is serious.

Method used

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  • Median-mean value-based underwater hybrid noise rapid filtering technology
  • Median-mean value-based underwater hybrid noise rapid filtering technology
  • Median-mean value-based underwater hybrid noise rapid filtering technology

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Embodiment 1

[0044] The purpose of the present invention is to provide a median-mean based rapid filtering technology of underwater mixed noise, which can effectively suppress underwater mixed noise and improve the real-time performance of filtering.

[0045]Median filtering and mean filtering are the two most commonly used and practical methods in digital image processing, which are used to deal with impulse noise and Gaussian noise respectively. However, underwater optical images often contain these two types of noise at the same time. When the noise pollution is serious, the interaction between the noises will lead to a single filtering method that cannot effectively eliminate the noise, resulting in filtering failure. The invention discloses a median-mean-based rapid filtering technology of underwater mixed noise, the purpose of which is to effectively combine the median filter and the mean filter while quickly suppressing these two types of noise and improve the real-time performance o...

Embodiment 2

[0052] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

[0053] Step 1: Acquire underwater visible light images;

[0054] The underwater visible light image of the present invention is completed by shooting the analog camera on the AUV at a distance of 3m from the real object at the bottom of the pool.

[0055] Step 2: Set decomposition speeds up the median calculation process;

[0056] Such as figure 2 As shown, the set decomposition accelerated median calculation process is divided into the following steps:

[0057] Step1: First assign a status flag status to each pixel of the image to be processed, initialized to 1, and the status flag is used to determine whether a pixel is successfully filtered during program execution. Determine an initial filter window W, the default window size is 3*3...

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Abstract

The invention discloses a median-mean value-based underwater hybrid noise rapid filtering technology, belonging to the field of image filtering preprocessing technology. The purpose of the technologyis to combine the median filtering. and the mean filtering. effectively and suppress these two kinds of noises quickly, so as to improve the real-time performance of filtering. The technology is advantageous to the real-time target tracking. The median-mean value-based underwater hybrid noise rapid filtering technology includes the following steps of acquiring an underwater visible light image; determining the selection rules of initial filtering windows and adaptive filtering windows; carrying out the set decomposition accelerated median filtering; carrying out the median-mean joint filteringto obtain the image finally processed. This filtering technology can effectively suppress the hybrid noise of the underwater optical images and is time-consuming and real-time, especially when the hybrid noise is serious, this filtering technology is obviously superior to the traditional single filtering technique, which is conducive to the real-time tracking of underwater targets.

Description

technical field [0001] The invention relates to the technical field of underwater image filtering preprocessing, in particular to a median-mean-based fast filtering technology of underwater mixed noise. Background technique [0002] In today's society, various video cameras and cameras emerge in an endless stream, so there are more and more various images. However, due to the noise interference of the shooting environment and the problems of the equipment itself, some noise will be mixed into the image, so the image quality will be degraded. , because the underwater environment has significant low-contrast and high-noise characteristics, the underwater image degradation is more obvious. When the noise pollution is serious, some underwater optical images even appear seriously distorted, losing the inherent attributes and values ​​of the image. Therefore, underwater optical images generally require image preprocessing before use to restore the inherent information of the imag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00
CPCG06T2207/20004G06T2207/20032G06T2207/20024G06T5/70
Inventor 杜雪廖泓舟张勋张伟李娟陈涛张宏瀚
Owner HARBIN ENG UNIV