Adaptive denoising method for ultrasonic image

An ultrasonic image, self-adaptive technology, applied in image enhancement, image data processing, instruments, etc., can solve problems such as large amount of calculation, loss of image information, and difficulty in application

Inactive Publication Date: 2015-06-03
WUHAN BEBEL HEALTH BIOTECH
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Problems solved by technology

However, this method simply divides the pixels into edge areas and non-edge areas according to the mathematical statistical characteristics of pixels in a certain ne...

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  • Adaptive denoising method for ultrasonic image
  • Adaptive denoising method for ultrasonic image
  • Adaptive denoising method for ultrasonic image

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Embodiment Construction

[0048] Embodiments of the present invention will now be described with reference to the drawings, in which like reference numerals represent like elements.

[0049] like figure 1 As shown, the adaptive denoising method of the ultrasonic image of the present embodiment includes the following steps:

[0050] Step S1: acquiring an ultrasound image;

[0051] Step S2: Decompose the ultrasound image to obtain Gaussian layers at different scales:

[0052] Gaussian 0 =I 0 , (1-1)

[0053] Gaussian i =Reduce(Gaussian i-1 )(i is a natural number), (1-2)

[0054] In the formula, I 0 For the acquired ultrasound images, Gaussian 0 For the first layer of Gaussian layer, Gaussian i is the i-th Gaussian layer, and the Gaussian smoothing operator of the Reduce function is a 5×5 matrix 1 256 1 4 6 4 ...

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Abstract

The invention discloses an adaptive denoising method for an ultrasonic image. The adaptive denoising method comprises the following steps: (1) obtaining the ultrasonic image; (2) performing Gaussian-Laplacian pyramid decomposition on the ultrasonic image and obtaining Gaussian layers and Laplacian layers at different scales; (3) calculating a structure tensor and a diffusion tensor of the Gaussian layer at each scale and performing anisotropic diffusion filtering treatment on the Gaussian layer at the scale; (4) according to a characteristic value of the structure tensor of the Gaussian layer, designing a grey mapping curve, and performing grey mapping on the Gaussian layer at the scale according to the grey mapping curve; (5) repeating the steps (3) and (4) for multiple times and performing the same treatment on the Gaussian layer and the Laplacian layer at each scale; (6) performing reverse reconstruction on the treated Gaussian layer and Laplacian layer and obtaining a denoised ultrasonic image; (7) outputting the denoised ultrasonic image. The adaptive denoising method can inhibit edge enhancement and spots of the image and is simple in algorithm and strong in adaptability.

Description

technical field [0001] The invention relates to the technical field of data processing in ultrasonic imaging, in particular to an adaptive denoising method for ultrasonic images. Background technique [0002] In medical ultrasound imaging, due to the inhomogeneity of the imaging organ or tissue structure, the interference phenomenon of the acoustic signal and the artifacts caused by the tissue movement, when some small tissue structures are smaller than the wavelength of the emitted ultrasound, the ultrasonic image forms characteristic multiplicative speckle, which degrades image quality. [0003] At present, there are mainly three kinds of denoising algorithms commonly used in ultrasonic images, namely, resolution enhancement method, superposition averaging method and post-processing method. [0004] The resolution enhancement method mainly enhances the resolution of the ultrasound system from the front end of the whole system, so as to achieve the purpose of noise reducti...

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Application Information

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IPC IPC(8): G06T5/00
Inventor 詹鑫伟
Owner WUHAN BEBEL HEALTH BIOTECH
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