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Magnetic resonance image denoising method

A magnetic resonance image and image technology, applied in the field of image processing, can solve the problems of increased processing time and increased processing complexity, and achieve the effects of reducing blur, improving processing speed, and improving denoising effect.

Inactive Publication Date: 2018-03-27
CHENGDU UNIV OF INFORMATION TECH
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Problems solved by technology

The improved method of non-local mean algorithm using collaborative filtering of two or more algorithms improves the performance of denoising and increases the complexity of processing, thus increasing the processing time

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Embodiment Construction

[0054]In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0055] Such as figure 1 As shown, a magnetic resonance image denoising method, comprising the following steps:

[0056] Step 1: tensor decomposition;

[0057] Step 11: Find the tensor matrix of the noise image;

[0058] Use the CP decomposition method in the tensor decomposition to calculate the partial derivatives Ix and Iy in the X and Y directions respectively, and calculate the partial derivatives in the two directions respectively:

[0059] Ix2=Ix.^2;

[0060] Iy2=Iy.^2;

[0061] Ixy=Ix.*Iy;

[0062] Three values ​​constitute the tensor matrix ST=[Ix2, Ixy; Ixy, Iy2] of the noise image. The basic method of tensor decomposition is as figure 2 As shown, the original image matrix is ​​estimated with the smaller two matrices, while the main stru...

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Abstract

The invention discloses a magnetic resonance image denoising method which comprises the following steps: performing tensor decomposition; splitting image blocks; calculating the similarity weight; estimating the pixel value; and performing deviation correction. The magnetic resonance image denoising method disclosed by the invention has the advantages that the magnetic resonance image denoising effect is improved, so that more original image information can be saved, and blurring of the image edge part is reduced. The magnetic resonance image processing speed is improved. The method can be combined with other improved non-local mean denoising algorithms and is used for improving the image processing speed, and the denoising result can be ensured.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a magnetic resonance image denoising method. Background technique [0002] The proportion of medical images in clinical diagnosis and research is getting higher and higher, and their status is becoming more and more important. It can provide doctors with complete and accurate image information of relevant parts inside the human body in a non-invasive manner, and provides a very important reference for doctors' examination and diagnosis. There are many imaging technologies, including: X-ray, tomography, ultrasound, nuclear imaging, magnetic resonance imaging and other technical means. Among them, magnetic resonance imaging (MRI) technology can provide very clear images of organs and tissues of the human body, so it is widely used in medical treatment. Due to limited conditions, the signal-to-noise ratio of the acquired magnetic resonance images is usually relatively low...

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Application Information

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IPC IPC(8): G06T5/00
CPCG06T2207/10088G06T5/70
Inventor 吴涛谢磊陈曦
Owner CHENGDU UNIV OF INFORMATION TECH
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