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Denoising system and method for ultrasonic image speckle noise

A technology of ultrasonic image and speckle noise, which is applied in image enhancement, image analysis, image data processing, etc. It can solve the problem that filtering methods are difficult to isolate, distinguish and eliminate, and achieve the effect of eliminating messy spots and image uniformity

Pending Publication Date: 2017-05-31
CHENGDU YOUTU TECH
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Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art, and provide a denoising system and denoising method for ultrasonic image speckle noise, so as to solve the problem that the existing filtering method is difficult to isolate and eliminate speckle noise in ultrasonic images

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  • Denoising system and method for ultrasonic image speckle noise
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  • Denoising system and method for ultrasonic image speckle noise

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[0040] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and corresponding drawings.

[0041] refer to figure 1 , 2 , 3 and 4, all kinds of macro and micro phenomena are based on the universal laws of nature, and noise is no exception. In particular, speckle noise, which comes from the interior, is different from the noise from the outside, and can be processed through internal statistical laws. This involves the evolution of free energy. The invention considers that the evolution of speckle noise can be regarded as a dynamic process, which conforms to the Ginzburg-Landau free energy theory. In this way, we can introduce the free energy functional, with certain boundary conditions, and specifically describe the denoising process of speckle noise through nonlinear parti...

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Abstract

The invention discloses a denoising system for ultrasonic image speckle noise. The denoising system comprises a phase field loading module, a normalization processing module, a partial differential processing module, a free energy noise reduction module, a threshold value detection module and an image display module. The denoising method comprises steps as follows: S1, ultrasonic image loading; S2, normalization processing; S3, partial differential processing; S4, free energy noise reduction; S5, threshold value detection; S6, image display. Denoising is performed according to the statistical rule of minimization of free energy, and through analysis of noise attributes, speckle noise with the average value being zero can be weakened and even counteracted through iterative computation by an established proper nonlinear partial differential equation. In a flat area, the main purpose of denoising is to eliminate scrambled speckles, and an image becomes more uniform. In a boundary area, accurate recognition is firstly made to the boundary, details are reserved, and noise and boundary change are separated in the evolution process.

Description

technical field [0001] The invention specifically relates to a denoising system and a denoising method for ultrasonic image speckle noise. Background technique [0002] The reflected and scattered waves formed after the ultrasonic wave enters the human tissue are received by the ultrasonic probe and analyzed and displayed by the back-end instrument to generate an ultrasonic image. In the actual clinical ultrasonic testing process, due to the inhomogeneity of the acoustic impedance of human soft tissue and the randomness of spatial distribution, a large number of randomly distributed scattering particles will be formed, and the scattering particles will generate scattered waves related to each other. When scattered waves meet at a certain point in space, constructive interference and destructive interference occur. The echo signal generated by the mutual interference between the scattering particles and the scattering of the ultrasonic wave are superimposed, making the signa...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00
CPCG06T2207/20182G06T2207/10132G06T5/70
Inventor 吴哲王权泳王文平
Owner CHENGDU YOUTU TECH
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