Non-local mean filter method for three-dimensional ultrasonic images

A non-local average and three-dimensional ultrasound technology, which is applied in ultrasound/sonic/infrasonic diagnosis, image enhancement, sound wave diagnosis, etc., can solve the problems of poor filtering effect and loss of detailed information, shorten the filtering time, reduce speckle noise, image smoothing effect

Active Publication Date: 2014-01-29
维视医学影像有限公司
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Problems solved by technology

[0004] Aiming at the above defects or improvement needs of the prior art, the present invention provides a non-local mean filtering method for 3D ultrasound im

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  • Non-local mean filter method for three-dimensional ultrasonic images
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  • Non-local mean filter method for three-dimensional ultrasonic images

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[0029] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0030] For a given three-dimensional image, especially three-dimensional ultrasound images, such as figure 1 As shown, the specific steps of the non-local mean filtering method provided by the present invention are as follows:

[0031] (1) Load the three-dimensional image information of size W×H×F.

[0032] (2) Determine the distance between the side length of the reference block and the center of adjacen...

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Abstract

The invention discloses a filter method for three-dimensional ultrasonic images, and belongs to the field of three-dimensional image processing. The filter method includes loading a to-be-filtered three-dimensional ultrasonic image, splitting the to-be-filtered target three-dimensional ultrasonic image into reference blocks, and specifying a search area for each reference block; using all image blocks with the sizes identical to the size of each reference block in the corresponding search area as similar blocks and computing a similarity degree of each similar block and the corresponding reference block; using a weighted mean value of the corresponding similar blocks as a filter result of each reference block and a weight of the corresponding weighted mean value as a similarity degree of each reference block; integrating the filter results of the reference blocks to obtain a final filter result of the three-dimensional ultrasonic image. Compared with the prior art, the filter method has the advantages that the three-dimensional image can be directly filtered without being split into two-dimensional image frames to be filtered, and gray information among frames can be utilized, so that a filter effect can be obviously improved, and detail information of the image can be effectively preserved; the filter method is applicable to accelerating a GPU (graphics processing unit), so that the filter time can be greatly shortened.

Description

Technical field [0001] The invention belongs to the field of three-dimensional image processing, and more specifically, relates to a non-local mean filtering method for three-dimensional ultrasound images. Background technique [0002] Three-dimensional ultrasound imaging has achieved research results in many aspects including basic theories, imaging techniques, clinical experiments, etc., and it has received more and more attention in clinical diagnosis. Three-dimensional ultrasound imaging technology can provide three-dimensional structure images of tissues and organs. Compared with traditional two-dimensional ultrasound, the image display is intuitive, which facilitates accurate measurement of medical diagnostic parameters. However, due to the coherent characteristics of ultrasound imaging, speckle noise exists in the image, and during the process of acquiring, converting, and transmitting three-dimensional ultrasound images, it is susceptible to interference from imaging equi...

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Application Information

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IPC IPC(8): G06T5/00A61B8/00
Inventor 侯文广李柳王学文翁飞张旭明丁明跃
Owner 维视医学影像有限公司
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