Image noise level estimation method and device and computer storage medium

A technology of image noise and noise level, applied in the field of image processing, can solve the problem of inability to accurately estimate the noise level of various noise images

Pending Publication Date: 2021-08-24
WUHAN INSTITUTE OF TECHNOLOGY
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Problems solved by technology

[0004] In order to solve the problem that the existing image noise level estimation method cannot accurately estimate the noise level of various noisy images, the present invention provides an image noise level estimation method, device and computer storage medium

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  • Image noise level estimation method and device and computer storage medium
  • Image noise level estimation method and device and computer storage medium
  • Image noise level estimation method and device and computer storage medium

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Embodiment Construction

[0040] The following examples are further explanations and supplements to the present invention, and do not constitute any limitation to the present invention.

[0041] A method for estimating an image noise level according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0042] refer to figure 1 As shown, the present invention provides a method for estimating image noise level, comprising:

[0043] S1. Obtain an initial estimated value of the noise level of the noisy image, and obtain an image flat block set of the noisy image according to the initial estimated value;

[0044] S2. According to the image flat block set, calculate an estimated value of the noise level of the noisy image based on chi-square distribution, reacquire the image flat block set according to the estimated value, and calculate the noise level of the noisy image Estimated value until the estimated value of the noise level obtained by two consec...

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Abstract

The invention relates to an image noise level estimation method and device and a computer storage medium, and the method comprises the steps: obtaining an initial estimation value of the noise level of a noise-containing image, and obtaining an image flat block set of the noise-containing image according to the initial estimation value; according to the image flat block set, calculating an estimated value of the noise level of the noisy image based on chi-square distribution, and according to the estimated value, obtaining the image flat block set again and calculating the estimated value of the noise level of the noisy image, and stopping iteration until the estimated value of the noise level obtained by continuous two times of calculation is kept unchanged or iteration reaches a preset number of times, and obtaining a final estimated value of the noise level of the noisy image. By means of the method, on the basis of the chi-square distribution principle, the image flat blocks are repeatedly screened to conduct loop iteration to estimate the noise level, and the accuracy of noise level estimation of various noise images can be greatly improved.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to an image noise level estimation method, device and computer storage medium. Background technique [0002] Noise is often introduced in the process of image acquisition and transmission, so noise level estimation of noisy images has become a very important research topic in the field of image processing technology. The quality of noise level estimation affects the difficulty of other image processing technologies. ease and accuracy, such as image denoising, image segmentation, image recognition, etc. [0003] The most common image noise is additive white Gaussian noise. Most of the early image denoising algorithms solve the problem by simply assuming that the real noise level is known. Provide the noise level in advance to effectively carry out subsequent image processing; so far, image noise level estimation algorithms are mainly divided into two categories: one...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T5/00G06N3/04G06N3/08
CPCG06T7/0002G06T5/002G06N3/08G06T2207/10004G06T2207/20081G06T2207/20084G06N3/045
Inventor 黄正华王志成朱子凡
Owner WUHAN INSTITUTE OF TECHNOLOGY
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