A method and device for realizing wavelet denoising

A technology of wavelet denoising and wavelet coefficient, which is applied in the field of image processing, can solve the problems that the noise does not completely conform to the Gaussian distribution and the denoising effect is not good, so as to optimize the denoising effect and improve the denoising effect

Active Publication Date: 2021-10-08
ZTE CORP
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Problems solved by technology

[0004] In the existing denoising methods, since wavelet denoising is only applicable to Gaussian distribution noise, when the noise completely conforms to Gaussian distribution, the noise variance of the image is calculated according to the high-frequency part of the wavelet coefficient of the first layer, while In fact, the noise does not completely follow the Gaussian distribution in the image, so the denoising effect is not good

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  • A method and device for realizing wavelet denoising
  • A method and device for realizing wavelet denoising

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[0071] In order to facilitate the understanding of those skilled in the art, the present invention will be further described below in conjunction with the accompanying drawings, which cannot be used to limit the protection scope of the present invention. It should be noted that, in the case of no conflict, the embodiments in the present application and various manners in the embodiments can be combined with each other.

[0072] see figure 1 , the present invention proposes a method for realizing wavelet denoising, comprising:

[0073] Step 100: Perform down-sampling on the image, and perform wavelet denoising on images of each channel of each down-sampled image respectively to obtain a denoised image of each channel of each down-sampled image.

[0074] In this step, wavelet denoising is performed on the images of each channel of each image after downsampling to obtain the denoising image of each channel of each image after downsampling, including:

[0075]The images of each ...

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Abstract

The invention discloses a method and device for realizing wavelet denoising, comprising: performing down-sampling on an image, respectively performing wavelet de-noising on images of each channel of each down-sampled image to obtain each channel of each down-sampled image The denoised image; the obtained denoised images are synthesized into a complete denoised image. The invention improves the denoising effect.

Description

technical field [0001] The invention relates to image processing technology, in particular to a method and device for realizing wavelet denoising. Background technique [0002] Existing methods for implementing wavelet denoising roughly include: [0003] Perform dual continuation on the image; perform wavelet transformation on the image after dual continuation to obtain the first layer of wavelet coefficients; calculate the noise variance of the image according to the high frequency part of the first layer of wavelet coefficients, and calculate according to the noise variance of the image and the variance of the image The wavelet coefficients of the first layer image; perform wavelet transformation on the low-frequency part of the i-th layer wavelet coefficients to obtain the (i+1) layer wavelet coefficients; calculate the (i+1)th layer according to the noise variance of the image and the low-frequency part of the i-th layer wavelet coefficients ) layer image wavelet coeffi...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00
CPCG06T5/00
Inventor 路小波卓俊伟胡文迪曾维理韩雪伍学惠刘春雪
Owner ZTE CORP
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